Upstream Oxygen Sensor Replacement for BMW X4, X5, X6, 335i, 335i, 435i, 535i, 640i, 740i, 740Li, GT, Gran Coupe, xDrive, ActiveHybrid 3 5 7, M2, M235i

As a temporary solution, fitment correct, however does not conform to BMW programming. Therefore check engine light remains however the device does work

Waste of money, spend a bit more on better quality product.The unit reported CEL for heating element within few months. Could not believe that brand new sensor failed in less then 5,000 miles. After period of time CEL code disappeared and vehicle drove fine without any signal from the sensor. Tried swapping plugs between upstream and downstream sensors and than back to their original plus, somehow sensor began to work but heating element continue not to work without any any codes. Once sensor began to send signal the vehicle gradually began to shake and than worsened where it galloped like a horse forward and back only at 800-1500 RPM and no error codes.Used special tools to verify signal from this upstream oxygen sensor and refer to attached screenshots, oscillating wave is when fuel and Air mixture is out of wack causing the whole car to shake when accelerating and steady signal when car is coasting on the highway.After more diagnostics confirmed if driving slow and coasting engine codes were not detected due to slow response from the sensor and if accelerating fast or until redline instantly get CEL code.Customer service is not any better, reported issues with sensor and asked for technical

Part meets DME adoption, and works great.

The trouble I went through replacing it, this thing stopped working about 3 months later will never buy it again and I definitely wanna my money back.

Imagine going through all the trouble of manufacturing oxygen sensors and then attaching plugs that don't plug into anything for diddlysquat. Of course most "after market parts," are reverse engineered and the plug on this was just off enough that it does NOT fit snugly, so I don't yet know if it'll work at all. I will probably try replacing it with the original plug, to find out if the sensor itself is also shite.

This thing kept throwing the heater error. Not worth the trouble.

I put this onto my bmw and yet I am still getting error and car is driving pretty bad.

Sold me a bad part