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Details
| Specification | Value |
|---|---|
| Brand | FTE |
| Connecting thread | M16x1.5 / M14x1.5 |
| Piston Rod Length [mm] | 85 mm |
| Piston Rod Thread | M12x1.5 |
| Operating Mode | PH |
| Bore Diameter 1 [mm] | 25.4 mm |
| Bore Diameter 2 [mm] | 95 mm |
| Piston Rod Diameter [mm] | 18 mm |
| for manufacturer number | KV25003A1 |
OE numbers (7)
About this product
Sourced from FTE, this clutch booster (3300125) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Connecting thread: M16x1, 5 / M14x1, Rubber, Piston Rod Length [mm]: 85 mm, Piston Rod Thread: M12x1, Rubber, Operating Mode: PH, Bore Diameter 1 [mm]: 25, Copper mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 1521371, 1655435, 16554354, 1668501 and 23 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FTE 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
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (20)
Clutch Booster FTE 3300125 — compatible car models
| Manufacturer article number (MPN) | 3300125 |
|---|---|
| OE part numbers | 1521371, 1655435, 16554354, 1668501, 16685018, 1671953, 21257218 |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
FTE 3300125 . Bore Diameter 1 [mm]: 25,4 mm. Bore Diameter 2 [mm]: 95 mm. Connecting thread: M16x1,5 / M14x1,5. for manufacturer number: KV25003A1. Operating Mode: PH. Piston Rod Diameter [mm]: 18 mm. Piston Rod Length [mm]: 85 mm. Piston Rod Thread: M12x1,5
- 1x Clutch Booster
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 Clutch Booster 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 Clutch Booster fits. All fitment data is verified through TecDoc.
What specifications does this FTE Clutch Booster have?
This FTE Clutch Booster has the following specifications: Connecting thread: M16x1,5 / M14x1,5; Piston Rod Length [mm]: 85 mm; Piston Rod Thread: M12x1,5; Operating Mode: PH; Bore Diameter 1 [mm]: 25,4 mm; Bore Diameter 2 [mm]: 95 mm. Check the full specifications table above for complete details.
What OE part numbers does this Clutch Booster replace?
This Clutch Booster replaces OE part numbers: 1521371, 1655435, 16554354, 1668501, 16685018, 1671953, 21257218. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Clutch Booster cost?
This FTE Clutch Booster is available for £295.99. Clutch Booster prices vary depending on brand, specifications, and vehicle compatibility. FTE parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Clutch Booster?
Regular inspection of your Clutch Booster 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 Clutch Booster?
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 Clutch Booster fitted by a professional mechanic.
Can I use this part as a replacement for OE 1521371?
Yes, this FTE Clutch Booster is a direct replacement for OE part number 1521371. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
