OPTIMAL Gas Spring Bonnet (AG-51153) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Length [mm]: 548 mm, Weight [kg]: 0, 197 kg, Stroke [mm]: 214 mm, Extention Force [N]: 225 N, Housing Diameter [mm]: EPDM mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with SAAB 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: 11-30422-SX, 128856, 157341, 2110354 and 16 more. Matching these numbers confirms a like-for-like replacement with no loss of function. OPTIMAL 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.

OPTIMAL, founded in Germany, is a well-regarded aftermarket brand specialising in steering, suspension, and wheel bearing components. OPTIMAL produces ball joints, tie rod ends, control arm bushings, wheel bearings, and stabiliser links for European, Asian, and American vehicle applications. Manufactured to stringent quality standards with comprehensive testing protocols, OPTIMAL parts deliver OE-matching fit and performance. Known for excellent value and wide vehicle coverage, OPTIMAL is a popular choice among professional workshops across Europe.