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Details
| Specification | Value |
|---|---|
| Brand | KNECHT |
| MPN | lx4084 |
| Category | Air cleaner |
| Length [mm] | 342.0 mm |
| Width [mm] | 113 mm |
| Height [mm] | 77.0 mm |
| Packaging length [cm] | 12.0 cm |
| Packaging width [cm] | 8.50 cm |
| Packaging height [cm] | 35.00 cm |
| Net Weight [g] | 250 g |
OE numbers (2)
Search by this OE number to find compatible parts
- BMW—13718570043
- BMW—8570043
Where this part fits
Original-fit position for OE 13718570043. The red ring marks where this part installs on the vehicle.
About this product
KNECHT Air cleaner (LX 4084) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Length [mm]: 342, 0 mm, Width [mm]: 113 mm, Height [mm]: 77, 0 mm, Filter type: Stainless Steel, Packaging length [cm]: Zinc, 0 cm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with BMW 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: 13718570043, 153071762362, 154072407930, 20948536 and 23 more. Matching these numbers confirms a like-for-like replacement with no loss of function. KNECHT is a recognised supplier of automotive replacement 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 (25)
Show all 25 OE numbers
Air cleaner KNECHT LX 4084 — compatible car models
| Car models | BMW: 5 (F10), 5 Touring (F11), X3 (F25), X4 (F26), X5 (F15, F85) |
|---|---|
| Engines | 518 d; sDrive 18 d; xDrive 20 d; sDrive 25 d |
| Year of manufacture | 2009-2018 |
| Manufacturer article number (MPN) | LX 4084 |
| OE part numbers | 13718570043, 8570043 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
KNECHT lx4084 Air cleaner. Filter type: 9. Height [mm]: 77,0 mm. Length [mm]: 342,0 mm. Net Weight [g]: 250 g. Packaging height [cm]: 35,00 cm. Packaging length [cm]: 12,0 cm. Packaging width [cm]: 8,50 cm. Seal Material: 234
- 1x Air cleaner
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 Air cleaner compatible with my car?
This Air cleaner fits BMW 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 Air cleaner have?
This KNECHT Air cleaner has the following specifications: Length [mm]: 342,0 mm; Width [mm]: 113 mm; Height [mm]: 77,0 mm; Filter type: 9; Packaging length [cm]: 12,0 cm; Packaging width [cm]: 8,50 cm. Check the full specifications table above for complete details.
What OE part numbers does this Air cleaner replace?
This Air cleaner replaces OE part numbers: 13718570043, 8570043. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Air cleaner cost?
This KNECHT Air cleaner is available for £35.99. Air cleaner 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 Air cleaner?
A dirty air filter can cause reduced fuel economy, engine misfires, unusual engine sounds, or reduced horsepower. Most manufacturers recommend replacement every 15,000-30,000 miles, or more frequently in dusty conditions.
What tools do I need to replace a Air cleaner?
Tools needed: none for most vehicles (airbox clips open by hand); some require a flat-head screwdriver or T20 Torx. Difficulty: Easy DIY. Safety warning: Ensure the airbox is fully sealed after fitting -- an air leak downstream of the mass airflow sensor will cause running problems and potential fuel mixture faults.
Can I use this part as a replacement for OE 13718570043?
Yes, this KNECHT Air cleaner is a direct replacement for OE part number 13718570043. 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 LX 4084 the same as the KNECHT LX 1000?
No, while both are Air cleaner parts, they are different products. The KNECHT LX 4084 has Length [mm]: 342,0 mm, Width [mm]: 113 mm, Height [mm]: 77,0 mm. The KNECHT LX 1000 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.
