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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Fitting Position | Rear Left |
| Fitting Position | Rear Right |
| Thickness [mm] | 154 mm |
| Thickness [mm] | 260 mm |
| Weight [kg] | 9.4 kg |
| Outer Diameter [mm] | 220 mm |
| Outer Diameter [mm] | 155 mm |
| External Thread Size | M16 x 1.5 |
| External Thread Size | M24 x 1.5 |
OE numbers (4)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—942 320 37 21
- MERCEDES-BENZ—946 320 03 21
- MERCEDES-BENZ—A942 320 37 21
- MERCEDES-BENZ—A946 320 03 21
Where this part fits
Original-fit position for OE A9463200321.
About this product
The FEBI BILSTEIN Bellow Air Suspension (35878) 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: Fitting Position: Rear Left, Fitting Position: Rear Right, Thickness [mm]: 154 mm, Thickness [mm]: 260 mm, Weight [kg]: Stainless Steel, Copper kg. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 020.4737.C21, 04.010.6100.200, 04.060.6106.200, 04.060.6306.920 and 24 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FEBI BILSTEIN is a recognised supplier of automotive suspension 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 FEBI BILSTEIN
febi bilstein, founded in 1844 in Ennepetal, Germany, is one of the oldest and most comprehensive automotive parts suppliers in the independent aftermarket. febi bilstein offers over 40,000 parts spanning steering, suspension, engine, braking, cooling, and electrical systems. Certified to IATF 16949 and supplying OE-quality components, febi bilstein products undergo rigorous testing to match original equipment performance. With nearly 180 years of German engineering tradition, febi bilstein is the go-to brand for reliable, competitively priced replacement parts.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (25)
Show all 25 OE numbers
Bellow Air Suspension FEBI BILSTEIN 35878 — compatible car models
| Manufacturer article number (MPN) | 35878 |
|---|---|
| OE part numbers | 942 320 37 21, 946 320 03 21, A942 320 37 21, A946 320 03 21 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 35878 . External Thread Size: M16 x 1,5. External Thread Size: M24 x 1,5. Fitting Position: HL. Fitting Position: HR. Outer Diameter [mm]: 155 mm. Outer Diameter [mm]: 220 mm. Rolling piston material: 10. Supplementary Article/Supplementary Info: 39
- 1x Bellow Air Suspension
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 Bellow Air Suspension 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 Bellow Air Suspension fits. All fitment data is verified through TecDoc.
What specifications does this FEBI BILSTEIN Bellow Air Suspension have?
This FEBI BILSTEIN Bellow Air Suspension has the following specifications: Fitting Position: HL; Fitting Position: HR; Thickness [mm]: 154 mm; Thickness [mm]: 260 mm; Weight [kg]: 9,4 kg; Outer Diameter [mm]: 220 mm. Check the full specifications table above for complete details.
What OE part numbers does this Bellow Air Suspension replace?
This Bellow Air Suspension replaces OE part numbers: 942 320 37 21, 946 320 03 21, A942 320 37 21, A946 320 03 21. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Bellow Air Suspension cost?
This FEBI BILSTEIN Bellow Air Suspension is available for £119.99. Bellow Air Suspension prices vary depending on brand, specifications, and vehicle compatibility. FEBI BILSTEIN parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Bellow Air Suspension?
Regular inspection of your Bellow Air Suspension 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 Bellow Air Suspension?
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 Bellow Air Suspension fitted by a professional mechanic.
Can I use this part as a replacement for OE 942 320 37 21?
Yes, this FEBI BILSTEIN Bellow Air Suspension is a direct replacement for OE part number 942 320 37 21. 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 FEBI BILSTEIN 35878 the same as the FEBI BILSTEIN 101148?
No, while both are Bellow Air Suspension parts, they are different products. The FEBI BILSTEIN 35878 has Fitting Position: HL, Fitting Position: HR, Thickness [mm]: 154 mm. The FEBI BILSTEIN 101148 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.
