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Details
| Specification | Value |
|---|---|
| Brand | JAPKO |
| MPN | 21by00 |
| Category | Filter, interior air |
| Length [mm] | 810 mm |
| Length [mm] | 830 mm |
| Width [mm] | 130 mm |
| Height [mm] | 20 mm |
OE/OEM numbers (7)
Search by this OE number to find compatible parts
- BMW—64 31 6 803 970
- BMW—64 31 6 925 981
- BMW—64 31 6 946 629
- BMW—64 31 6 962 548
- BMW—64 31 6 962 551
- BMW—64 31 9 142 114
- BMW—64 31 9 313 517
Where this part fits
Original-fit position for OE 64319313517. The red ring marks where this part installs on the vehicle.
About this product
Sourced from JAPKO, this filter, interior air (21BY00) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — for OE number: 64316803970, Length [mm]: 810 mm, Length [mm]: 830 mm, Width [mm]: 130 mm, Height [mm]: 20 mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit ALPINA, BMW, BYD models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 0 986 628 508, 0 986 628 608, 1602, 1686236980 and 72 more. Matching these numbers confirms a like-for-like replacement with no loss of function. JAPKO 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.
Suitable cars
Equivalent products (70)
Show all 70 OE numbers
Filter, interior air JAPKO 21BY00 — compatible car models
| Car models | ALPINA: B3 Convertible (E93), B3 Coupe (E92), B3 (E90), B3 Touring (E91), D3 Coupe (E92), D3 (E90), D3 Estate (E91); BMW: 1 Convertible (E88), 1 Coupe (E82), 1 (E81), 1 (E87), 3 Convertible (E93), 3 Coupe (E92), 3 (E90), 3 (F30, F80), 3 Touring (E91), 3 Touring (F31) (+1 more); BYD: S6 |
|---|---|
| Engines | BiTurbo; Bi-Turbo; 2.0 Bi-Turbo; 2.0; 118 d; 116 d; 318 i; 316 i; 316 d; 328 i; sDrive 16 d |
| Year of manufacture | 2003-2019 |
| Manufacturer article number (MPN) | 21BY00 |
| OE part numbers | 64 31 6 803 970, 64 31 6 925 981, 64 31 6 946 629, 64 31 6 962 548, 64 31 6 962 551, 64 31 9 142 114, 64 31 9 313 517 |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
JAPKO 21by00 Filter, interior air. Filter type: 12. for OE number: 64316803970. Height [mm]: 20 mm. Length [mm]: 810 mm. Length [mm]: 830 mm. Width [mm]: 130 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 ALPINA, BMW, BYD 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 JAPKO Filter, interior air have?
This JAPKO Filter, interior air has the following specifications: for OE number: 64316803970; Length [mm]: 810 mm; Length [mm]: 830 mm; Width [mm]: 130 mm; Height [mm]: 20 mm; Filter type: 12. 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: 64 31 6 803 970, 64 31 6 925 981, 64 31 6 946 629, 64 31 6 962 548, 64 31 6 962 551, 64 31 9 142 114, 64 31 9 313 517. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Filter, interior air cost?
This JAPKO Filter, interior air is available for £12.99. Filter, interior air prices vary depending on brand, specifications, and vehicle compatibility. JAPKO 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 64 31 6 803 970?
Yes, this JAPKO Filter, interior air is a direct replacement for OE part number 64 31 6 803 970. 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.
