Stant Radiator Cap, black

Just like Oem, had a very slow loss of coolant. I replaced everything less than a year ago so I knew there was no leaks. There wasn’t any trace of coolant anywhere. On a whim I replaced the cap before I took it to the shop. Old cap was >15 years old, guess it was time. This one is perfect in its place.

I think this may be better than oem, correct me if I'm wrong. The center piece actually spins. My own one cracked causing major leakage. Hopefully nothing blew. I take my cap off at least twice a month to check my coolant level.

2004 BMW 325i e46, fits perfectly on factory radiator. I was hesitant to put anything beside a BMW oem cap on, but the Stant is very high quality and fits perfectly. I think I will order another just to have one on hand. This is the correct double o-ring as well.

My OEM expansion tank cap on my 2003 BMW E46 325i was slightly leaking due to weathered O-ring. Just replaced the whole thing. Quick and easy. So far so good. No more leaks. I will def buy again if needed. Thanks!!

Fit perfectly! It is just as the OEM cap was. My old cap was broken and literally falling to pieces to the point where I had to pry it out of the well whenever I needed to add coolant. That will no longer be a problem for my BMW E46 project car.

This fit my 92 BMW 325i ;)Tried three before this one at different parts stores :(This cap fits snug as a bug in a rug ;)(noted that I did purchase a new expansion tank before using the new cap)(some BMWs have recalls like most any other vehicle, I was unable to drive all of the way to the recall so I ordered the cap myself)(Some BMWs, the water pumps propeller is made of plastic and will melt showing no signs of breakage except overheating, it is best to replace them with a cast-iron​ propeller is what I read)(when filling the BMW coolant, at least on my BMW make sure to BLEED IT, or the temperature will never lower)Thanks for the great cap, worked after many had failed, and from the research I did, this is most likely one of the only caps that will work, even if it looks just like the other ones.

Coolant had leaked and my old radiator cap was wasted so I bought this new one and fits perfectly and no more coolant leaks !

Purchased for the overflow coolant bottle on a 2003 BMW 530i. Perfect replacement for the original part. Have not had any issues since I put it on the car. Part was delivered promptly and as described.