Reviews of DORMAN expansion tank

You Should be using BMW only brand , as a Dorman brand will leave you stranded every couple years .

I purchased a new expansion tank for my BMW e46. Initially, I opted for a Dorman expansion tank from AutoZone, but I wasn’t entirely convinced by my choice. Unfortunately, I observed that the AutoZone tank was leaking from the top, which left me puzzled. I wondered if this issue was due to it being an aftermarket part. This year alone, I’ve had to replace the tank five times, which has been quite frustrating.

i’m still rolling with a dorman expansion tank just because it was the only thing available on hand when the original one failed, no leaks yet