BOSCH 15109 Premium Original Equipment Oxygen Sensor - Compatible with Select BMW 320i, 323Ci, 323i, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, 330xi, 525i, 528i, 530i, X3, X5, Z3, Z4; Range Rover

Quality is better than the OEM. Installation and fit was easy perfect replacement part(s). Functions perfectly. My o2 sensor light gone. We'll worth the price.

Fits perfectly on my BMW X5. Extremely easy to install do it yourself and save 300 to 400 from the mechanic.

I did a double take when I saw the price for this part for my 2002 BMW 525I. The regular BMW website I usually shop from had it priced at twice the cost. Installed them and they are working perfectly, even more in love with Amazon for finding this deal and saving the money. When your oxygen sensors look like the picture posted, you know that they are due to be changed. These were 22 years old with 165,000 miles on them.

Good quality product

Fit perfect and works. Getting it through the passage way and secured is definitely tedious, but not the parts fault.

This Borsch brand works on the BMW e39 as an oem replacement. I had the Secondary Air Sensor (SAS) monitor not ready status, so I cannot get the car to smog. Replaced these downstream sensors and upstream sensors fixed the SAS issue. Tip: Once installed, you need to reset any codes on the ODB2 and perform an engine cycle run to get all the monitors ready. Search on bimmerforums.com/forum/showthread.php?890715-OBDII-Evaporative-System-Monitoring-not-complete

BMW E46 M54 engine Code P1155 Bank2 sensor 2 code Resolved. IF YOU WANT TO FIX IT ONCE.. AND DONE... Always go with BOSCHE

Did not fit connections on my 2003 bmw E46 325i M54 sedan Made on April 2003. THESE O2 SENSORS ARE FOR 325I's MADE BEFORE AND UP TO THE DATE OF 3/2003. I guess there is a year split for the 325i's in 2003. The others, like mine were made after this date and use different O2 sensors and other different engine parts too I found out. For BMW's made after 3/03 the downstreams you want are the bosch 15680 and 15681 (either one of these will fit both downstreams). And for the upstream you want the bosch 17215 and 17216 (either one of these will fit both upstreams). The only difference is the color of rubber that covers the wires, and the price. So just buy 2 of the cheaper downstream sensors and 2 of the cheaper upstream sensors. I do not know if the sensors that fit my M54 engine will fit the M56. I just hope this helps someone. GOOD LUCK.