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Details
| Specification | Value |
|---|---|
| Brand | KNECHT |
| MPN | la51-s |
| Category | Filter, interior air |
| Length [mm] | 280.0 mm |
| Width [mm] | 203 mm |
| Height [mm] | 28.0 mm |
| Packaging length [cm] | 21.0 cm |
| Packaging width [cm] | 6.00 cm |
| Packaging height [cm] | 29.00 cm |
| Net Weight [g] | 163 g |
OE numbers (5)
Search by this OE number to find compatible parts
- AUDI / CUPRA / VW—4D0819439
- AUDI / VW—4D0819439A
- AUDI / CUPRA / VW—4D0819647
- AUDI / CUPRA / VW—4D0898438
- AUDI / CUPRA / VW—4D0898438A
Where this part fits
Original-fit position for OE 4D0898438.
About this product
When filter, interior air performance matters, the KNECHT LA 51/S delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Length [mm]: 280, 0 mm, Width [mm]: 203 mm, Height [mm]: 28, 0 mm, Filter type: 21, Packaging length [cm]: 21, 0 cm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. 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: 09450, 10301031, 10311031, 1123190006/S and 53 more. Matching these numbers confirms a like-for-like replacement with no loss of function. KNECHT 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (55)
Show all 55 OE numbers
Filter, interior air KNECHT LA 51/S — compatible car models
| Car models | AUDI: A8 D2 (4D2, 4D8) |
|---|---|
| Engines | 2.5 TDI |
| Year of manufacture | 1994-2005 |
| Manufacturer article number (MPN) | LA 51/S |
| OE part numbers | 4D0819439, 4D0819439A, 4D0819647, 4D0898438, 4D0898438A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
KNECHT la51-s Filter, interior air. Filter type: 21. Height [mm]: 28,0 mm. Length [mm]: 280,0 mm. Net Weight [g]: 163 g. Packaging height [cm]: 29,00 cm. Packaging length [cm]: 21,0 cm. Packaging width [cm]: 6,00 cm. Width [mm]: 203 mm
- 1x Filter, interior air
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- 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 KNECHT Filter, interior air have?
This KNECHT Filter, interior air has the following specifications: Length [mm]: 280,0 mm; Width [mm]: 203 mm; Height [mm]: 28,0 mm; Filter type: 21; Packaging length [cm]: 21,0 cm; Packaging width [cm]: 6,00 cm. 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: 4D0819439, 4D0819439A, 4D0819647, 4D0898438, 4D0898438A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Filter, interior air cost?
This KNECHT Filter, interior air is available for £64.99. Filter, interior air prices vary depending on brand, specifications, and vehicle compatibility. KNECHT 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 4D0819439?
Yes, this KNECHT Filter, interior air is a direct replacement for OE part number 4D0819439. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the KNECHT LA 51/S the same as the KNECHT LA 100?
No, while both are Filter, interior air parts, they are different products. The KNECHT LA 51/S has Length [mm]: 280,0 mm, Width [mm]: 203 mm, Height [mm]: 28,0 mm. The KNECHT LA 100 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
