Review on 🌡️ BMW Coolant Temperature Sensor for E87 E81 E46 E90 E91 E39 E60 F10 - Lower Radiator Hose Compatible by Andy Hearshman

Perfect product, just what I was looking for. For the price, the quality was exceptional, indistinguishable from OEM. I have a BMW Z4 and what usually happens with these coolant sensors is the o-ring around it starts to wear out and deform, causing it to force coolant through the sensor under pressure. . I pulled it out very quickly and after that there were no problems. Can't comment on durability, only wore it for a few hours but looks like it will last a while in my opinion. If you're wondering how to pressure test and find a cooling system leak, use a cooling system pressure gauge yourself (AutoZone usually has the tools for this). Apply as much pressure as you can without exceeding 10psi, which if you at least have it you still can't. And as you pump, watch and listen for coolant leaking from hoses, radiators, sensors or even the engine. If you have a coolant leak, you can't even build pressure. Unless you have a leak and/or want to verify that you've fixed it, you should maintain at least 5 or 10 psi of pressure without losing pressure. Just make sure you don't go over 10-15psi when testing as it's unnecessary and you could damage something. I hoped this helped someone