BMW E81 / E82 / E87 / E88 1 Series & E90 / E91 / E92 / E93 3 Series Billet Aluminium Rear Differential Mount Insert Kit 2005 - 2013 (Excludes 1M / M3)
Eliminate rear differential movement and tighten up power delivery on your BMW E8X / E9X chassis with this premium billet aluminium rear differential mount insert kit, precision CNC-machined from 6061 billet aluminium for permanent durability and dramatically improved drivetrain response. Factory rubber differential bushings on the E8X / E9X chassis are notorious for deforming under load — particularly when applying or releasing throttle in spirited driving — resulting in vague feedback from the rear axle, clunky shifts, and unstable handling characteristics that frustrate enthusiasts. Commercially available polyurethane and solid differential bushings address the deformation issue but introduce significant NVH penalties and complicated installation procedures. This insert kit takes a smarter approach — precision-fit aluminium inserts fill the voids in the factory differential bracket, suppressing differential displacement and optimizing drivetrain response without the harsh NVH increase of full bushing replacement. The result is sharper throttle response, smoother shifts, and more consistent rear-end behavior with minimal impact on daily driveability.
Features:
- Sturdy and durable construction – 6061 billet aluminium material delivers exceptional strength while keeping weight low
- CNC machined precision – ensures high dimensional accuracy for a perfect fit to factory differential mounting bracket geometry
- Anodized surface finish – delivers rust-proof and anti-corrosion protection for sustained underbody and weather exposure
- Precision reinforcement design – factory-positioned inserts fill the voids in the differential bracket perfectly, suppressing rubber compliance without replacing the entire bushing
- Dynamic performance enhancement – suppresses differential displacement under load, optimizes shift smoothness, and maintains linear throttle response
- Low NVH improvement design – delivers performance benefits with minimal noise, vibration, and harshness increase compared to full polyurethane or solid bushing alternatives
- Simpler installation than full bushing replacement – avoids the complicated extraction and pressing procedures required for complete differential bushing replacement
Specifications:
- Condition: 100% Brand New
- Type: Rear Differential Mount Insert Kit
- Material: 6061 Billet Aluminium
- Construction: CNC Machined
- Surface Finish: Anodized
- NVH Increase: Low
- Position: Rear Differential Mount Bracket
- Purpose: Performance Upgrade / Drivetrain Stabilization
Fitment:
Will NOT fit BMW 1M or M3 variants. Verify your model and trim before ordering.
- BMW 1 Series E81 / E82 / E87 / E88 (2005 – 2013) – Excludes 1M
- BMW 3 Series E90 / E91 / E92 / E93 (2005 – 2013) – Excludes M3
- Compatible with non-M variants only – not compatible with BMW 1M or M3 chassis which use different rear differential mounting geometry
- Confirm vehicle model, chassis code, and trim before ordering
Contents:
- Rear Differential Mount Insert Kit
Benefits:
- Eliminates the vague rear axle feedback caused by deformed factory rubber differential bushings – delivering sharper, more direct rear-end response under throttle
- Suppresses differential displacement under load – the rear differential stays positioned correctly during hard acceleration, deceleration, and gear changes
- Optimizes shift smoothness on both manual and automatic transmissions – reduced differential movement during shifts eliminates the clunky engagement common to aged factory bushings
- Maintains linear throttle response – particularly noticeable during transition phases (on/off throttle) where rubber bushing deformation typically introduces lag and inconsistency
- Smarter approach than full bushing replacement – the precision insert design delivers most of the performance benefits of solid bushings without the harsh NVH increase or complicated installation
- 6061 billet aluminium construction provides permanent dimensional stability – will not crack, deform, or degrade like rubber alternatives over time
- Anodized finish maintains the premium aluminium appearance and corrosion resistance for the lifetime of the vehicle
- Significant cost savings compared to high-end polyurethane or solid differential bushing kits while delivering equivalent performance benefits with better daily driveability
Installation Notes:
- Body / chassis fitment verification: This kit fits non-M E8X / E9X variants only. It will NOT fit 1M, M3, or other M-specific chassis which use different rear differential mounting geometry
- Properly support the rear of the vehicle on jack stands rated for the vehicle weight before beginning installation – never work under a vehicle supported only by a jack
- Inserts are designed to fill voids in the existing factory differential bracket – they complement rather than replace the factory rubber bushings
- Inspect the surrounding rear differential mounting hardware during installation – worn or damaged factory bushings should be replaced before installing the inserts for optimal performance
- Ensure inserts are properly seated in their factory-designed positions before final assembly – improper seating will compromise the precision reinforcement benefit
- Apply manufacturer-specified torque values to all rear differential mounting hardware after installation
- Test rear-end response and drivetrain behavior at low speeds before aggressive driving – the difference is typically immediately noticeable in throttle response and rear-end stability
- Professional installation recommended if you are unfamiliar with rear differential and subframe service procedures
- If unsure about compatibility with your specific BMW variant or chassis code, contact our team with your year, model, and chassis code (E81 / E82 / E87 / E88 / E90 / E91 / E92 / E93) before ordering
Warranty:
- 12-month standard warranty from date of purchase
- Contact our support team for assistance with any issues
Eliminate rear differential movement and tighten up power delivery on your BMW E8X / E9X chassis with this premium billet aluminium rear differential mount insert kit, precision CNC-machined from 6061 billet aluminium for permanent durability and dramatically improved drivetrain response. Factory rubber differential bushings on the E8X / E9X chassis are notorious for deforming under load — particularly when applying or releasing throttle in spirited driving — resulting in vague feedback from the rear axle, clunky shifts, and unstable handling characteristics that frustrate enthusiasts. Commercially available polyurethane and solid differential bushings address the deformation issue but introduce significant NVH penalties and complicated installation procedures. This insert kit takes a smarter approach — precision-fit aluminium inserts fill the voids in the factory differential bracket, suppressing differential displacement and optimizing drivetrain response without the harsh NVH increase of full bushing replacement. The result is sharper throttle response, smoother shifts, and more consistent rear-end behavior with minimal impact on daily driveability.
Features:
- Sturdy and durable construction – 6061 billet aluminium material delivers exceptional strength while keeping weight low
- CNC machined precision – ensures high dimensional accuracy for a perfect fit to factory differential mounting bracket geometry
- Anodized surface finish – delivers rust-proof and anti-corrosion protection for sustained underbody and weather exposure
- Precision reinforcement design – factory-positioned inserts fill the voids in the differential bracket perfectly, suppressing rubber compliance without replacing the entire bushing
- Dynamic performance enhancement – suppresses differential displacement under load, optimizes shift smoothness, and maintains linear throttle response
- Low NVH improvement design – delivers performance benefits with minimal noise, vibration, and harshness increase compared to full polyurethane or solid bushing alternatives
- Simpler installation than full bushing replacement – avoids the complicated extraction and pressing procedures required for complete differential bushing replacement
Specifications:
- Condition: 100% Brand New
- Type: Rear Differential Mount Insert Kit
- Material: 6061 Billet Aluminium
- Construction: CNC Machined
- Surface Finish: Anodized
- NVH Increase: Low
- Position: Rear Differential Mount Bracket
- Purpose: Performance Upgrade / Drivetrain Stabilization
Fitment:
Will NOT fit BMW 1M or M3 variants. Verify your model and trim before ordering.
- BMW 1 Series E81 / E82 / E87 / E88 (2005 – 2013) – Excludes 1M
- BMW 3 Series E90 / E91 / E92 / E93 (2005 – 2013) – Excludes M3
- Compatible with non-M variants only – not compatible with BMW 1M or M3 chassis which use different rear differential mounting geometry
- Confirm vehicle model, chassis code, and trim before ordering
Contents:
- Rear Differential Mount Insert Kit
Benefits:
- Eliminates the vague rear axle feedback caused by deformed factory rubber differential bushings – delivering sharper, more direct rear-end response under throttle
- Suppresses differential displacement under load – the rear differential stays positioned correctly during hard acceleration, deceleration, and gear changes
- Optimizes shift smoothness on both manual and automatic transmissions – reduced differential movement during shifts eliminates the clunky engagement common to aged factory bushings
- Maintains linear throttle response – particularly noticeable during transition phases (on/off throttle) where rubber bushing deformation typically introduces lag and inconsistency
- Smarter approach than full bushing replacement – the precision insert design delivers most of the performance benefits of solid bushings without the harsh NVH increase or complicated installation
- 6061 billet aluminium construction provides permanent dimensional stability – will not crack, deform, or degrade like rubber alternatives over time
- Anodized finish maintains the premium aluminium appearance and corrosion resistance for the lifetime of the vehicle
- Significant cost savings compared to high-end polyurethane or solid differential bushing kits while delivering equivalent performance benefits with better daily driveability
Installation Notes:
- Body / chassis fitment verification: This kit fits non-M E8X / E9X variants only. It will NOT fit 1M, M3, or other M-specific chassis which use different rear differential mounting geometry
- Properly support the rear of the vehicle on jack stands rated for the vehicle weight before beginning installation – never work under a vehicle supported only by a jack
- Inserts are designed to fill voids in the existing factory differential bracket – they complement rather than replace the factory rubber bushings
- Inspect the surrounding rear differential mounting hardware during installation – worn or damaged factory bushings should be replaced before installing the inserts for optimal performance
- Ensure inserts are properly seated in their factory-designed positions before final assembly – improper seating will compromise the precision reinforcement benefit
- Apply manufacturer-specified torque values to all rear differential mounting hardware after installation
- Test rear-end response and drivetrain behavior at low speeds before aggressive driving – the difference is typically immediately noticeable in throttle response and rear-end stability
- Professional installation recommended if you are unfamiliar with rear differential and subframe service procedures
- If unsure about compatibility with your specific BMW variant or chassis code, contact our team with your year, model, and chassis code (E81 / E82 / E87 / E88 / E90 / E91 / E92 / E93) before ordering
Warranty:
- 12-month standard warranty from date of purchase
- Contact our support team for assistance with any issues
- Fitment verified for YOUR exact year/model/trim
- Not sure? Call +1 772-277-2495 for a real specialist to help you order
- Got install questions? Text a tech who's actually installed this part before, even after it arrives
FREE Shipping
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BMW E81 / E82 / E87 / E88 1 Series & E90 / E91 / E92 / E93 3 Series Billet Aluminium Rear Differential Mount Insert Kit 2005 - 2013 (Excludes 1M / M3) is backordered and will ship as soon as it is back in stock.
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Wrong fit or arrives damaged? Free replacement or refund
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Details
Details
Eliminate rear differential movement and tighten up power delivery on your BMW E8X / E9X chassis with this premium billet aluminium rear differential mount insert kit, precision CNC-machined from 6061 billet aluminium for permanent durability and dramatically improved drivetrain response. Factory rubber differential bushings on the E8X / E9X chassis are notorious for deforming under load — particularly when applying or releasing throttle in spirited driving — resulting in vague feedback from the rear axle, clunky shifts, and unstable handling characteristics that frustrate enthusiasts. Commercially available polyurethane and solid differential bushings address the deformation issue but introduce significant NVH penalties and complicated installation procedures. This insert kit takes a smarter approach — precision-fit aluminium inserts fill the voids in the factory differential bracket, suppressing differential displacement and optimizing drivetrain response without the harsh NVH increase of full bushing replacement. The result is sharper throttle response, smoother shifts, and more consistent rear-end behavior with minimal impact on daily driveability.
Features:
- Sturdy and durable construction – 6061 billet aluminium material delivers exceptional strength while keeping weight low
- CNC machined precision – ensures high dimensional accuracy for a perfect fit to factory differential mounting bracket geometry
- Anodized surface finish – delivers rust-proof and anti-corrosion protection for sustained underbody and weather exposure
- Precision reinforcement design – factory-positioned inserts fill the voids in the differential bracket perfectly, suppressing rubber compliance without replacing the entire bushing
- Dynamic performance enhancement – suppresses differential displacement under load, optimizes shift smoothness, and maintains linear throttle response
- Low NVH improvement design – delivers performance benefits with minimal noise, vibration, and harshness increase compared to full polyurethane or solid bushing alternatives
- Simpler installation than full bushing replacement – avoids the complicated extraction and pressing procedures required for complete differential bushing replacement
Specifications:
- Condition: 100% Brand New
- Type: Rear Differential Mount Insert Kit
- Material: 6061 Billet Aluminium
- Construction: CNC Machined
- Surface Finish: Anodized
- NVH Increase: Low
- Position: Rear Differential Mount Bracket
- Purpose: Performance Upgrade / Drivetrain Stabilization
Fitment:
Will NOT fit BMW 1M or M3 variants. Verify your model and trim before ordering.
- BMW 1 Series E81 / E82 / E87 / E88 (2005 – 2013) – Excludes 1M
- BMW 3 Series E90 / E91 / E92 / E93 (2005 – 2013) – Excludes M3
- Compatible with non-M variants only – not compatible with BMW 1M or M3 chassis which use different rear differential mounting geometry
- Confirm vehicle model, chassis code, and trim before ordering
Contents:
- Rear Differential Mount Insert Kit
Benefits:
- Eliminates the vague rear axle feedback caused by deformed factory rubber differential bushings – delivering sharper, more direct rear-end response under throttle
- Suppresses differential displacement under load – the rear differential stays positioned correctly during hard acceleration, deceleration, and gear changes
- Optimizes shift smoothness on both manual and automatic transmissions – reduced differential movement during shifts eliminates the clunky engagement common to aged factory bushings
- Maintains linear throttle response – particularly noticeable during transition phases (on/off throttle) where rubber bushing deformation typically introduces lag and inconsistency
- Smarter approach than full bushing replacement – the precision insert design delivers most of the performance benefits of solid bushings without the harsh NVH increase or complicated installation
- 6061 billet aluminium construction provides permanent dimensional stability – will not crack, deform, or degrade like rubber alternatives over time
- Anodized finish maintains the premium aluminium appearance and corrosion resistance for the lifetime of the vehicle
- Significant cost savings compared to high-end polyurethane or solid differential bushing kits while delivering equivalent performance benefits with better daily driveability
Installation Notes:
- Body / chassis fitment verification: This kit fits non-M E8X / E9X variants only. It will NOT fit 1M, M3, or other M-specific chassis which use different rear differential mounting geometry
- Properly support the rear of the vehicle on jack stands rated for the vehicle weight before beginning installation – never work under a vehicle supported only by a jack
- Inserts are designed to fill voids in the existing factory differential bracket – they complement rather than replace the factory rubber bushings
- Inspect the surrounding rear differential mounting hardware during installation – worn or damaged factory bushings should be replaced before installing the inserts for optimal performance
- Ensure inserts are properly seated in their factory-designed positions before final assembly – improper seating will compromise the precision reinforcement benefit
- Apply manufacturer-specified torque values to all rear differential mounting hardware after installation
- Test rear-end response and drivetrain behavior at low speeds before aggressive driving – the difference is typically immediately noticeable in throttle response and rear-end stability
- Professional installation recommended if you are unfamiliar with rear differential and subframe service procedures
- If unsure about compatibility with your specific BMW variant or chassis code, contact our team with your year, model, and chassis code (E81 / E82 / E87 / E88 / E90 / E91 / E92 / E93) before ordering
Warranty:
- 12-month standard warranty from date of purchase
- Contact our support team for assistance with any issues
Fitment
Fitment
Our Guarantee
Our Guarantee
Warranty Assurance:
At K2 Industries, your satisfaction is our priority, and we stand behind the quality of our products. Here's a brief overview of our warranty:
Defect Coverage:
If you find a defect after receiving your order, get in touch with us. We're committed to resolving the issue, whether it involves a replacement, repair, or refund.
Installation Note:
Please inspect your purchase before installation. Unfortunately, damages post-installation are not covered, so ensure everything looks good beforehand.
Claims Made Simple:
Need to make a claim? Reach out to us at support@k2-industries.com. We're here to assist you. Just keep your original packaging and documentation handy.
Your Satisfaction Matters:
Your trust in K2 Industries is appreciated. We're dedicated to ensuring your satisfaction with our quality automotive parts.
Shipping & Returns
Shipping & Returns
Shipping Information:
At K2 Industries, we strive to provide a seamless and efficient shopping experience for automotive enthusiasts like you. Our commitment is to deliver high-quality parts to your doorstep with the utmost care.
Fast and Reliable Shipping:
Many of our products are stocked in our local warehouse, ensuring swift processing and delivery. Orders placed for these items typically ship within 2-5 business days, allowing you to get your parts in no time.
Extended Selection, Global Reach:
To offer you a broader range of automotive parts, some items are sourced from trusted suppliers around the world. While these products might have a slightly longer processing time, we assure you that the wait is worth it for the exceptional quality and value they bring.
Shipping Transparency:
For products shipped internationally, we provide estimated delivery times on the product page. Rest assured, we are continually working to optimize our supply chain and minimize any potential delays.
Combined Shipments:
To streamline your shopping experience, if your order includes items from both our local warehouse and international suppliers, they may be shipped separately. You will receive separate tracking information for each shipment.
Questions or Concerns?
If you have any questions about shipping or would like assistance tracking your order, our dedicated customer support team is here to help. Feel free to reach out to us at support@k2-industries.com.
You can also track your order here
Thank you for choosing K2 Industries for your automotive needs. We appreciate your trust in us.
FAQs
How do I confirm this part fits my vehicle?
Use the vehicle selector at the top of this page to verify fitment. If anything's unclear, send us your year/model/trim (or VIN) via live chat or email support@k2-industries.com — we'll confirm fitment for free, before you commit.
How long until I get my order?
In-stock items typically process in 3-5 business days, then ship — most domestic orders arrive within 3-7 business days after that. Larger freight items take 3-10 days in transit. Some items are made-to-order (carbon fiber, aero kits) and require 10-25 business days of production before shipping — these are marked on the product page.
What if it arrives damaged?
Inspect your shipment when it arrives, take photos of any damage to the box and part, and reach out via live chat or support@k2-industries.com. For freight deliveries, note visible damage on the paperwork before signing. We handle the carrier claim and get you a replacement.
What if I want to return it?
You have 30 days from delivery. As long as the part is uninstalled and in original condition, you can choose between an exchange, store credit (no fees, never expires — our most popular option), or a refund. Drop us a message and we'll walk you through the easiest path.
Can I install this myself, or do I need a shop?
Depends on the part. Some are straightforward DIY, others are body shop or specialist work. Each product page indicates the recommended install path. If you're unsure, message us with your build details and we'll give you a real assessment.
What's the fastest way to reach you?
Live chat and email — typical response time is a few business hours, and you can reach out anytime. Chat with us on the site or email support@k2-industries.com. We resolve issues directly far faster than going through your bank or card processor.
BMW E81 / E82 / E87 / E88 1 Series & E90 / E91 / E92 / E93 3 Se...
The K2 Difference
- • Built by enthusiasts who've made every fitment mistake you're afraid of. Now we verify parts for 30,000+ builds a year with zero wrong-part claims.
- • Real specialists answer your questions in minutes, not chatbots reading scripts. We've built the same cars you're building.
- • Freight damage, wrong parts, installation question, we handle it so you don't deal with suppliers or shipping companies.
Built By Someone Who's Been There
Max, the Owner, started in his garage making E36 M3 tail lights in his own oven.
- • Started modifying cars before he could legally drive them
- • Spent years hunting down parts that actually fit and don't suck
- • Made the same fitment mistakes you're afraid of
What You Get With Every Order
What Sets K2 Industries Apart?
Perfect fit guaranteedFrequently Asked Questions
How do I know this will actually fit my car?
How do I know this will actually fit my car?
Every part listing shows compatible years, models, and trims. But here's the thing—trim packages and factory options can be confusing. If you're not 100% certain, text us at 772-277-2495 with your VIN or photos of your car. We'll verify fitment before you order so you're not stuck with an $800 part that doesn't fit. We've done this for 30,000+ builds. We've seen every weird trim combo and factory option. Takes us 2 minutes to verify, saves you weeks of headaches.
What if the part arrives damaged or is the wrong item?
What if the part arrives damaged or is the wrong item?
We handle it. You don't fight with freight companies or file claims. Text us photos within 48 hours of delivery. If it's damaged or wrong, we ship a replacement immediately. You're not waiting 6 weeks for a freight claim to process. We eat the cost, not you. This is why we package everything like it's going to war. But if something slips through, we fix it ASAP. No forms, no back-and-forth, no "file a claim and wait." Just text us and we handle it.
Can I install this myself or do I need a shop?
Can I install this myself or do I need a shop?
Depends on the part. Emblems, front lips, some spoilers, bolt-on, DIY-friendly, you can do it in your driveway with basic tools. Full bumpers, hoods, wide-body kits, possible for experienced DIYers but most people take them to a shop for paint and install. Check the product description for installation difficulty. If you're unsure, text us. We'll be honest about whether you can handle it or if you should take it to a pro. We'd rather you know upfront than get frustrated halfway through.
What's your return policy if it doesn't fit or I don't like it?
What's your return policy if it doesn't fit or I don't like it?
30 days, unused parts in original packaging. You pay return shipping unless we sent the wrong part or it arrived defective. Once you install it, modify it, paint it, or mount it, we can't take it back. That's why we push so hard on verifying fitment BEFORE you order. We don't want you stuck with something you can't use. Text us before ordering if you're unsure. We'll confirm fitment so you never have to worry about returns.
Do you offer financing?
Do you offer financing?
Yes. Affirm and Shop Pay available at checkout for orders over $50. Split payments over 3-12 months depending on order size. No hard credit check to see your options. Most people use this for big-ticket items like body kits, suspension setups, or wheel/tire packages. Rates vary based on credit. You see the monthly payment before you commit. Makes it easier to build now instead of waiting months to save up.
What if I have questions after I receive the part?
What if I have questions after I receive the part?
Text 772-277-2495. We don't disappear after you buy. Fitment questions, installation issues, "does this bolt go here" questions... we'll walk you through it. We've installed these parts ourselves or helped hundreds of people install them. You're not getting transferred to a call center in the Philippines. You're texting someone who's actually installed your part before. If we can't help remotely, we'll recommend a local shop that knows these parts.
Why should I buy from K2 instead of eBay/Amazon/other sites?
Why should I buy from K2 instead of eBay/Amazon/other sites?
eBay and Amazon sellers don't answer fitment questions. They don't verify your VIN before shipping. They don't handle freight damage claims for you. If something goes wrong, you're filing disputes and waiting weeks. We're builders selling to builders. We verify fitment before you order. We handle damage claims same-day. We answer texts in minutes. We're not the cheapest, but you're not gambling $800 on whether a part fits. You're paying for support, verification, and someone who cares if your build goes sideways.
What does your warranty cover?
What does your warranty cover?
1 year against manufacturing defects: cracking, warping, paint peeling, hardware failure, fitment issues caused by the part being made wrong. Does NOT cover installation damage (you cracked it bolting it on), road damage (curb rash, rock chips), or normal wear. If it breaks because we made it wrong, we replace it free. If it breaks because you hit a parking block, that's on you. We're fair about it. Send photos and we'll tell you honestly if it's covered.
Shipping
Do you ship overseas?
Do you ship overseas?
Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.
How much does shipping cost and when will I see the total?
How much does shipping cost and when will I see the total?
Depending on where you're located, small parts can ship free. Large parts like bumpers, hoods, and body kits require freight shipping. Uou'll see the exact cost at checkout before you pay. Freight usually runs $150-$300 depending on size and your location. We know it's expensive. We negotiate the best rates we can. If you're ordering multiple large parts, text us. We can sometimes combine shipping and save you money. We're not hiding fees in the final step. What you see at checkout is what you pay.
How long will it take to receive my order?
How long will it take to receive my order?
It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.
