Review on Replacement Mercedes Benz Upstream Postition 234 4672 by Michael Miner

Good value for money. Allowed me to replace all oxygen sensors (4) for less than the price of a single genuine BMW sensor. So far they've worked well. I'm using the Torque Pro app to monitor live data and so far the data looks ok. Fixed: Check engine lightbulb associated with a faulty heater circuit. The old sensors were 20 years old, mileage 100,000. A good result so far. ****** Be sure to apply COPPER ANTISEIZE to the sensor threads (threads only) ****** This will prevent damage to the threads from abrasion and allow for easy removal later.