{"product_id":"for-1999-2005-vw-golf-jetta-bora-mk4-audi-a3-1-8t-aum-auq-silicone-crankcase-breather-hose-kit","title":"VW Golf MK4 \/ Jetta MK4 \/ Bora \u0026 Audi A3 8L 1.8T AUM \/ AUQ Silicone Crankcase Breather Hose Kit 1998 - 2006 (5-Piece Set)","description":"\u003cp\u003e\nReplace your aged, cracked, and leaking factory crankcase breather hoses with this premium 5-piece silicone breather hose kit, hand-crafted from multi-ply silicone and nylon-reinforced construction for permanent durability and superior heat resistance. Factory rubber breather hoses on the 1.8T AUM and AUQ engines are notorious for hardening, splitting, and developing vacuum leaks after years of underhood heat exposure — leading to rough idling, oil leaks, increased oil consumption, check engine lights, and persistent vacuum leak codes that frustrate VAG enthusiasts. This silicone replacement kit permanently eliminates the recurring breather hose failure problem with bursting pressure of 245 PSI, temperature tolerance from -60°C to +260°C, and visual presentation that elevates the engine bay aesthetic while delivering genuine functional reliability.\n\u003c\/p\u003e\n\n\u003ch6\u003eFeatures:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003ePremium silicone \u0026amp; nylon-reinforced construction – multi-ply hand-crafted hoses deliver superior heat resistance, pressure handling, and long-term durability compared to factory rubber alternatives\u003c\/li\u003e\n\u003cli\u003e3-ply 4.5mm wall thickness – overbuilt construction ensures structural strength and resistance to deformation under sustained crankcase pressure cycling\u003c\/li\u003e\n\u003cli\u003eDirect factory replacement design – manufactured to exacting OE dimensional specifications for clean, modification-free installation\u003c\/li\u003e\n\u003cli\u003eWide color selection – available in matte black, gloss black, blue, red, green, white, yellow, pink, purple, grey, and orange to match any engine bay aesthetic\u003c\/li\u003e\n\u003cli\u003eExtreme temperature tolerance – rated for -60°C (-76°F) to +260°C (+500°F) operation, far exceeding factory rubber breather hose limits\u003c\/li\u003e\n\u003cli\u003eHigh pressure handling – 245 PSI bursting pressure rating with 0.3-0.9 MPa working pressure range provides significant safety margin over factory specifications\u003c\/li\u003e\n\u003cli\u003ePermanent vacuum leak fix – addresses the recurring crankcase ventilation failures that plague aged 1.8T engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eCondition: 100% Brand New\u003c\/li\u003e\n\u003cli\u003eType: Crankcase Breather Hose Kit\u003c\/li\u003e\n\u003cli\u003eMaterial: Premium Silicone with Nylon Reinforcement\u003c\/li\u003e\n\u003cli\u003eConstruction: 3-Ply (4.5mm) \/ 4-Ply (5.4mm) Multi-Ply\u003c\/li\u003e\n\u003cli\u003eWall Thickness: 4.5mm (3-Ply Standard)\u003c\/li\u003e\n\u003cli\u003eBursting Pressure: 245 PSI\u003c\/li\u003e\n\u003cli\u003eWorking Pressure: 0.3 – 0.9 MPa\u003c\/li\u003e\n\u003cli\u003eTemperature Range: -60°C to +260°C (-76°F to +500°F)\u003c\/li\u003e\n\u003cli\u003eSize Tolerance: ±0.5 mm\u003c\/li\u003e\n\u003cli\u003eQuantity: 5 hoses per set\u003c\/li\u003e\n\u003cli\u003eAvailable Colors: Matte Black \/ Black \/ Blue \/ Red \/ Green \/ White \/ Yellow \/ Pink \/ Purple \/ Grey \/ Orange\u003c\/li\u003e\n\u003cli\u003ePosition: Crankcase Ventilation System\u003c\/li\u003e\n\u003cli\u003ePurpose: Performance Upgrade \/ OE Replacement \/ Vacuum Leak Repair\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eOE \/ Replacement Part Numbers:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e06A 103 213 F \/ 06A103213F\u003c\/li\u003e\n\u003cli\u003e06A 103 221 AF \/ 06A103221AF\u003c\/li\u003e\n\u003cli\u003e06A 103 221 AH \/ 06A103221AH\u003c\/li\u003e\n\u003cli\u003e06A 103 247 \/ 06A103247\u003c\/li\u003e\n\u003cli\u003e035 103 245 G \/ 035103245G\u003c\/li\u003e\n\u003cli\u003e035 103 245 A \/ 035103245A\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eFitment:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVW Golf MK4 1.8T:\u003c\/strong\u003e AUM \/ AUQ engines (1998 – 2006)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVW Jetta MK4 1.8T:\u003c\/strong\u003e AUM \/ AUQ engines (1999 – 2005)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVW Bora 1.8T:\u003c\/strong\u003e AUM \/ AUQ engines (1999 – 2005)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudi A3 8L 1.8T:\u003c\/strong\u003e AUM \/ AUQ \/ ARX \/ ARY engines (2001 – 2003)\u003c\/li\u003e\n\u003cli\u003eCompatible with 1.8T AUM \/ AUQ \/ ARX \/ ARY engine codes only – not compatible with 2.0L, 1.6L, 1.9 TDI, or other engine variants\u003c\/li\u003e\n\u003cli\u003eConfirm vehicle model, engine code, and factory breather hose part numbers before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eContents:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e5x Silicone Crankcase Breather Hoses (Complete Set)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eBenefits:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eSilicone construction permanently eliminates the cracking, hardening, and vacuum leak failures that plague factory rubber breather hoses on aged 1.8T engines after 15+ years of underhood heat exposure\u003c\/li\u003e\n\u003cli\u003eResolves persistent rough idle, vacuum leak codes (P0171 lean fault), oil consumption, and oil weeping issues associated with failed factory PCV breather hoses\u003c\/li\u003e\n\u003cli\u003eHigher pressure rating (245 PSI bursting pressure) provides significant safety margin for crankcase pressure cycling under all driving conditions\u003c\/li\u003e\n\u003cli\u003eWide temperature tolerance (-60°C to +260°C) maintains hose integrity in extreme cold starts, prolonged hot-climate driving, and sustained high-load operation\u003c\/li\u003e\n\u003cli\u003eMulti-ply nylon-reinforced construction prevents hose collapse under crankcase vacuum cycling – a common failure mode of aged single-ply rubber hoses\u003c\/li\u003e\n\u003cli\u003eLong-term durability eliminates the recurring expense and downtime of repeated breather hose replacement service intervals\u003c\/li\u003e\n\u003cli\u003eSignificant engine bay aesthetic upgrade – wide color selection allows engine bay theming to match your vehicle's exterior or build aesthetic\u003c\/li\u003e\n\u003cli\u003eSignificant cost savings compared to genuine VAG dealer rubber hoses, with substantially better long-term performance and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eInstallation Notes:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eAllow the engine to fully cool before beginning hose replacement to avoid burns from hot engine components\u003c\/li\u003e\n\u003cli\u003eNote the original routing and orientation of each factory breather hose during removal – take photos before disassembly to ensure correct reassembly\u003c\/li\u003e\n\u003cli\u003eInspect the PCV valve, breather assembly, and intake manifold connections during installation – replace any aged or damaged components to ensure long-term leak-free operation\u003c\/li\u003e\n\u003cli\u003eUse stainless steel T-bolt or worm-drive hose clamps appropriate for silicone hose – silicone requires properly sized clamps to seal effectively\u003c\/li\u003e\n\u003cli\u003eEnsure all connections are fully seated and clamped before starting the engine – improperly seated breather connections will cause vacuum leaks and rough running\u003c\/li\u003e\n\u003cli\u003eAfter installation, scan for stored fault codes and clear any historical vacuum leak codes (commonly P0171, P2187, or P0507) related to the previous failed breather hoses\u003c\/li\u003e\n\u003cli\u003eTest for vacuum leaks using a smoke test or carb cleaner spray method to verify proper sealing across all connections\u003c\/li\u003e\n\u003cli\u003eInstallation instructions are not included with the kit – professional installation is recommended unless you are familiar with VAG 1.8T crankcase ventilation system service procedures\u003c\/li\u003e\n\u003cli\u003eIf unsure about compatibility with your specific VW or Audi variant, contact our team with your year, model, and engine code (AUM \/ AUQ \/ ARX \/ ARY) before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eWarranty:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e12-month standard warranty from date of purchase\u003c\/li\u003e\n\u003cli\u003eContact our support team for assistance with any issues\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K2 Industries","offers":[{"title":"Purple","offer_id":46015463850218,"sku":"1005006126268651-Purple","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Orange","offer_id":46015463882986,"sku":"1005006126268651-Orange","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Pink","offer_id":46015463915754,"sku":"1005006126268651-Pink","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Green","offer_id":46015463948522,"sku":"1005006126268651-Green","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":46015463981290,"sku":"1005006126268651-Black","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":46015464014058,"sku":"1005006126268651-Blue","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":46015464046826,"sku":"1005006126268651-Red","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Grey","offer_id":46015464079594,"sku":"1005006126268651-Grey","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Matt Black","offer_id":46015464112362,"sku":"1005006126268651-Matt Black","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Yellow","offer_id":46015464145130,"sku":"1005006126268651-Yellow","price":149.99,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":46015464177898,"sku":"1005006126268651-White","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0477\/0427\/7142\/files\/Sd8869bfa788d4c47bb7a9699a2374eb30.webp?v=1777543843","url":"https:\/\/www.k2-industries.com\/en-ca\/products\/for-1999-2005-vw-golf-jetta-bora-mk4-audi-a3-1-8t-aum-auq-silicone-crankcase-breather-hose-kit","provider":"K2 Industries","version":"1.0","type":"link"}