Pre-Cat Oxygen Sensor, Bosch - E90 335d, F10 535d, E70 X5 35d, F15 X5 35d
Genuine Bosch O2 sensor to keep your emissions system running smoothly. OEM replacement for BMW part #13627801158
Pre-cat oxygen sensor for Diesel models E90 335d, F10 535d, E70 X5 35d, F15 X5 35d.
The pre-cat O2 sensors, also known as Lambda probes, on the 335d, 535d, and X5 35d are some of the most important sensors on the M57 and N57 engines. The pre-cat sensors installed ahead of the DPF tell the engine computer how well the engine is working (note: not how clean it is, that's the post-cat sensor). The pre-cat sensors give the ECU feedback on the engine tuning - if it's running lean or rich - and the ECU makes adjustments based on their data. The ECU adjusts fuel injection based on the data so the sensors also affect fuel economy in addition to performance. An integrated heater circuit helps prolong the life of the sensor but can also fail and give a check engine light.
Signs of an O2 sensor failure include worse fuel economy, lack of torque, and fault codes for the sensor. It is a good idea to replace the O2 sensors at regular intervals rather than waiting for a failure. Since their performance degrades over time you may not even notice the loss in performance or economy. Since the complete O2 sensor is part of the emissions system, a bad sensor may not set multiple OBD Readiness flags.
This is an OEM pre-cat O2 sensor manufactured by Bosch - the original supplier to BMW for this part, as well as many other sensors (Bosch also invented the oxygen sensor). As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.
E90 / E91 / E92 / E93 (06-13) > 335d
F10 / F11 (11-16) > 535d xDrive
E70 X5 (07-13) > X5 xDrive35d
F15 X5 (2014+) > X5 xDrive35d