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Details
| Specification | Value |
|---|---|
| Brand | BOSCH |
| MPN | f026400278 |
| Height [mm] | 534 mm |
| Outer Diameter [mm] | 180 mm |
OE numbers (16)
Search by this OE number to find compatible parts
About this product
The BOSCH Secondary Air Filter (F 026 400 278) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Height [mm]: 534 mm, Outer Diameter [mm]: 180 mm, Filter type: Stainless Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 0 986 626 790, 1514580, 1541435, 1564832 and 46 more. Matching these numbers confirms a like-for-like replacement with no loss of function. BOSCH 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.
About BOSCH
Robert Bosch GmbH, founded in 1886 in Stuttgart, Germany, is one of the world's largest automotive parts suppliers. Bosch specialises in braking systems, fuel injection, spark plugs, alternators, and electronic engine management. As an OE supplier to virtually every major car manufacturer, Bosch parts meet or exceed original equipment specifications. With over 130 years of engineering innovation, choosing Bosch means choosing proven reliability backed by extensive research and development.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (34)
Show all 34 OE numbers
Secondary Air Filter BOSCH F 026 400 278 — compatible car models
| Manufacturer article number (MPN) | F 026 400 278 |
|---|---|
| OE part numbers | 1N 8164, 20732734, 423217C1, 427202, 45928, 4881175, 48811756, 4N 9164, 50 01 268 584, 50 10 269 584, 503136933, 736 13 54, 8L 5897, 942625C1, N1950526, Z0850539 |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
BOSCH f026400278 . Filter type: 9. Height [mm]: 534 mm. Outer Diameter [mm]: 180 mm
- 1x Secondary Air Filter
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 Secondary Air Filter compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Secondary Air Filter fits. All fitment data is verified through TecDoc.
What specifications does this BOSCH Secondary Air Filter have?
This BOSCH Secondary Air Filter has the following specifications: Height [mm]: 534 mm; Outer Diameter [mm]: 180 mm; Filter type: 9. Check the full specifications table above for complete details.
What OE part numbers does this Secondary Air Filter replace?
This Secondary Air Filter replaces OE part numbers: 1N 8164, 20732734, 423217C1, 427202, 45928, 4881175, 48811756, 4N 9164 and 8 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Secondary Air Filter cost?
This BOSCH Secondary Air Filter is available for £34.99. Secondary Air Filter prices vary depending on brand, specifications, and vehicle compatibility. BOSCH parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Secondary Air Filter?
Regular inspection of your Secondary Air Filter is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Secondary Air Filter?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Secondary Air Filter fitted by a professional mechanic.
Can I use this part as a replacement for OE 1N 8164?
Yes, this BOSCH Secondary Air Filter is a direct replacement for OE part number 1N 8164. 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 BOSCH F 026 400 278 the same as the BOSCH F 026 400 241?
No, while both are Secondary Air Filter parts, they are different products. The BOSCH F 026 400 278 has Height [mm]: 534 mm, Outer Diameter [mm]: 180 mm, Filter type: 9. The BOSCH F 026 400 241 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.
