KARPAL Radiator Coolant Recovery Expansion Overflow Tank Reservoir + Sensor + Cap + Clip + Thermostat Compatible With E46 E83 E53 323i X3

I normally try to stay with OEM or the manufacturers of OEM parts especially on BMWs. But in this instance, it was an old car that my friend was trying to get a couple more months of use out of. Anyway, this part fit perfectly with no issues and the included sensor worked fine. I can't speak to longevity at this time but the part appeared to be made well. Overall, I am very happy with this expansion tank.

Great fit for my 2005 BMW Z4 2.5i ! The installation was easy to do ! I recommend buying the whole kit wit the expansion tank mount as that is another common flaw of BMW. The quality of the tank seems to be good I installed this 2 weeks ago and have had no issues already drove my car 140 miles and my car does not over heat or leak any coolant. I’m satisfied with my purchase of the expansion tank to far.. I like that it comes with the sensor too ! Exact math for my BMW Z4 2005 and I’m happy for the fair priced tank

The transmission sensor did not fit, a little to big to I left the other in there. I couldve tried to live the o ring and it might of fit but didnt want to force it in and break it

Installed on a 07 BMW x3. Perfect fit and had all the necessary components to complete the install. So far, no problems and appears to be quality construction. Time will tell. This is a common failure item on BMWs with age. Good to keep a spare kit on hand. Good value.

Haven't installed yet hope not to have any problems.