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Details
| Specification | Value |
|---|---|
| Brand | CORTECO |
| Category | Filter, interior air |
| Length [mm] | 310 mm |
| Width [mm] | 194 mm |
| Height [mm] | 30 mm |
| Weight [kg] | 0,224 kg |
OE/OEM numbers (3)
Search by this OE number to find compatible parts
- AUDI—4A0 819 430 A
- AUDI—4B0 091 800
- AUDI—4B0 819 439 A
Where this part fits
Original-fit position for OE 4B0819439A. The red ring marks where this part installs on the vehicle.
About this product
CORTECO Filter, interior air (21651957) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Length [mm]: 310 mm, Width [mm]: 194 mm, Height [mm]: 30 mm, Weight [kg]: 0, 224 kg, Filter type: Carbon — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with AUDI vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 0 986 BF0 708, 108412, 1123200010, 17796 and 35 more. Matching these numbers confirms a like-for-like replacement with no loss of function. CORTECO is a recognised supplier of automotive filtration components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
About CORTECO
Corteco, part of the Freudenberg Group founded in 1849 in Weinheim, Germany, is a specialist manufacturer of sealing and vibration control components. Corteco specialises in oil seals, gaskets, engine mounts, transmission mounts, and shaft seals for all vehicle systems. As an OE supplier through Freudenberg's partnerships with major car manufacturers, Corteco components maintain the same quality standards as original parts. With Freudenberg's 170+ years of materials science expertise, Corteco delivers precision-engineered sealing and damping solutions trusted in millions of vehicles worldwide.
Suitable cars
Equivalent products (41)
Show all 41 OE numbers
Filter, interior air CORTECO 21651957 — compatible car models
| Car models | AUDI: 100 C4 Avant (4A5), 100 C4 Saloon (4A2), A6 C4 (4A2), A6 C4 Avant (4A5), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6) |
|---|---|
| Engines | 2.0 E; 2.0; 1.8 |
| Year of manufacture | 1990-2006 |
| Manufacturer article number (MPN) | 21651957 |
| OE part numbers | 4A0 819 430 A, 4B0 091 800, 4B0 819 439 A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
CORTECO 21651957 Filter, interior air. Filter type: 8. Height [mm]: 30 mm. Length [mm]: 310 mm. Weight [kg]: 0,224 kg. Width [mm]: 194 mm
- 1x Filter, interior air
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Filter, interior air compatible with my car?
This Filter, interior air fits AUDI vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this CORTECO Filter, interior air have?
This CORTECO Filter, interior air has the following specifications: Length [mm]: 310 mm; Width [mm]: 194 mm; Height [mm]: 30 mm; Weight [kg]: 0,224 kg; Filter type: 8. Check the full specifications table above for complete details.
What OE part numbers does this Filter, interior air replace?
This Filter, interior air replaces OE part numbers: 4A0 819 430 A, 4B0 091 800, 4B0 819 439 A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Filter, interior air cost?
This CORTECO Filter, interior air is available for £20.99. Filter, interior air prices vary depending on brand, specifications, and vehicle compatibility. CORTECO parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Filter, interior air?
Replace when you notice reduced airflow from the HVAC system, persistent musty odours, increased noise when the fan is running, or fogging windows. Most cabin filters should be changed every 15,000-25,000 miles.
What tools do I need to replace a Filter, interior air?
Tools needed: flat-head screwdriver or 8mm socket may be required to remove the glove box (location and access varies by model -- check the vehicle handbook). Difficulty: Easy DIY. Safety warning: Wear a dust mask when removing a heavily contaminated cabin filter -- it traps fine particulates, allergens, and bacteria.
Can I use this part as a replacement for OE 4A0 819 430 A?
Yes, this CORTECO Filter, interior air is a direct replacement for OE part number 4A0 819 430 A. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
