This Febi Bilstein retaining spring (part number 31799) is designed for coolant flanges and is compatible with a wide range of VW and Audi models. It is an OE matching quality part, ensuring reliable performance. The spring is made of steel and has a thickness of 1.98mm with a width of 32mm. It weighs 0.001kg. The TecDoc engine numbers it is compatible with include 13929, 13949, 4199, 15335, and many others. It is specifically designed for vehicles with Vehicle Identification Number (VIN) from 8D-V-205 001. It fits various VW models such as Golf IV, Golf V, Polo, Golf VII, Touran, Transporter V, Passat, Tiguan, Sharan, and more. It also fits AUDI models including A3, A4, A5, A6, A8, Q5, TT, and Allroad. Additionally, it is compatible with SKODA models like Octavia, Fabia, Superb, and Yeti, as well as SEAT models such as Ibiza, Leon, Altea, Alhambra, and Exeo. The product is shipped from the UK and offers a 60-day return policy.