Sourced from FAST, this spring (FT01946) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Fitting Position: Front Axle, Length [mm]: 365 mm, Spring Design: Brass, Outer Diameter [mm]: 155 mm, Wire Diameter [mm]: Zinc, Carbon mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit OPEL models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 10-21807K-SX, 10-21807-SX, 13172586, 13178145 and 41 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FAST 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.