Review on Audi R8 Coolant & Oil Expansion Tank Cap Lid Retrofit - VW Scirocco Passat cc Golf GTI Golf R Tigan - 420121321 / 420103485B (Coolant Cap) - Enhanced SEO by Brent Cole

Under heavy load, the coolant cap will NOT do its job. On a long, steep climb (I-5, Southbound, Grapevine), ALL the coolant drained out of the cap and I was stuck on the side of the road. but never as tight as the original. Like the other one here I've been having some trouble with the EPC backlight since I put these caps on my car. I cannot recommend them for any situation.