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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Fitting Position | Driver Side |
| Length [mm] | 333 mm |
| Weight [kg] | 0,198 kg |
| Stroke [mm] | 100 mm |
| Extention Force [N] | 680 N |
| Housing Diameter [mm] | 19 mm |
| Piston Rod Diameter [mm] | 8 mm |
| Mounting points diameter [mm] | 16.5 mm |
| Housing length [mm] | 170.5 mm |
OE numbers (1)
Search by this OE number to find compatible parts
- BMW—51 23 8 174 866
Where this part fits
Original-fit position for OE 51238174866. The red ring marks where this part installs on the vehicle.
About this product
When gas spring bonnet performance matters, the FEBI BILSTEIN 12640 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Fitting Position: FB, Length [mm]: 333 mm, Weight [kg]: 0, 198 kg, Stroke [mm]: 100 mm, Extention Force [N]: 680 N. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. 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: 0244HW, 09010477, 101-00-408, 11-10426-SX and 85 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
Equivalent products (93)
Show all 93 OE numbers
Gas Spring Bonnet FEBI BILSTEIN 12640 — compatible car models
| Car models | BMW: 5 (E39), 5 Touring (E39) |
|---|---|
| Engines | 520 d |
| Year of manufacture | 1995-2004 |
| Manufacturer article number (MPN) | 12640 |
| OE part numbers | 51 23 8 174 866 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 12640 . Extention Force [N]: 680 N. Fitting Position: FB. Housing Diameter [mm]: 19 mm. Housing length [mm]: 170,5 mm. Length [mm]: 333 mm. Mounting points diameter [mm]: 16,5 mm. Piston Rod Diameter [mm]: 8 mm. Stroke [mm]: 100 mm
- 1x Gas Spring Bonnet
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 Gas Spring Bonnet compatible with my car?
This Gas Spring Bonnet 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 FEBI BILSTEIN Gas Spring Bonnet have?
This FEBI BILSTEIN Gas Spring Bonnet has the following specifications: Fitting Position: FB; Length [mm]: 333 mm; Weight [kg]: 0,198 kg; Stroke [mm]: 100 mm; Extention Force [N]: 680 N; Housing Diameter [mm]: 19 mm. Check the full specifications table above for complete details.
What OE part numbers does this Gas Spring Bonnet replace?
This Gas Spring Bonnet replaces OE part numbers: 51 23 8 174 866. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Gas Spring Bonnet cost?
This FEBI BILSTEIN Gas Spring Bonnet is available for £20.99. Gas Spring Bonnet 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 Gas Spring Bonnet?
Regular inspection of your Gas Spring Bonnet 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 Gas Spring Bonnet?
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 Gas Spring Bonnet fitted by a professional mechanic.
Can I use this part as a replacement for OE 51 23 8 174 866?
Yes, this FEBI BILSTEIN Gas Spring Bonnet is a direct replacement for OE part number 51 23 8 174 866. 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 12640 the same as the FEBI BILSTEIN 01783?
No, while both are Gas Spring Bonnet parts, they are different products. The FEBI BILSTEIN 12640 has Fitting Position: FB, Length [mm]: 333 mm, Weight [kg]: 0,198 kg. The FEBI BILSTEIN 01783 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.
