BOSCH 13477 Premium Original Equipment Oxygen Sensor - Single

OEM bmw and actual Bosch O2 sensors. So if you were curious, they're indeed real. included image of STFT and LTFT *note*-LTFT were both setting at 11.75% and stft bank 1 was "in spec (+/-5%) while bank 2 was hitting 17-25% without throwing any CEL. since installing the two new O2 sensors *was a pain installing these on catless headers btw* my trims have came back to normal (as i had no vac leaks anywhere) and the car runs better than ever. -sure 7% LTFT on bank 2 might seem a bit higher than it should. but its under 10% and im OK WITH THAT!

The pre-cat sensors are pretty easy to replace on an E53 X5 with the M54 engine. I thought they would be really hard to break free but I also ordered the special tool to remove them. Hit them (cold) with some PB Blaster and let them sit an hour or two.The post-cat sensors require getting under the car so I have some lift time booked for next week.I was getting rich fuel trim codes for a long time; initially I removed and cleaned the AAC valve which made them go away for almost a year but they started coming back last month. So far I've put maybe 20 miles on it since replacing these and no codes. But time will tell.These are the same sensors you'd pay big bucks for at a BMW dealer. Bosch makes them for BMW. I usually buy my parts from FCP Euro having been burned by counterfeit/crappy parts, so I was happy to see these here for a really good price. These are for all BMW M52/M54 engines, but double check your part number at FCP before ordering here.

Exact fit for a 2001 BMW 530i. No more lean code for bank 1. Boxed in manufactures box and shipped well. Strongly suggest getting a O2 socket. On this model engine it makes it very easy to get to.

Looked to be genuine and worked perfectly.

I own a 2000 BMW 328Ci. The time came to replace the Pre Cat oxygen sensors. These have worked very well. A good decision over the generic brand names at much cheaper cost.

Same quality, cheaper, works as expected. My O2 sensor codes are gone away.

Bought my car used with no records so I had no idea when these were changed. My car was not giving me any problems or codes but as preventative maintenance I decided to change them.It was quite easy but time consuming for me. The reason for this is I was using a Crows Foot (22mm) rather than an O2 sensor socket. If you decided to get an O2 sensor socket, make sure it is thick because if the O2 sensor is stuck on really hard then the socket may bend.The O2 sensor is located on the passenger side of the vehicle on the exhaust. Nothing needs to be removed to get to them. You can see one close to the positive cable nut (refer to picture) and the other near the secondary air pump, both along the side of the engine.Remove the wires that go to the O2 sensors from the brackets that are on the engine. Then disconnect one O2 sensor. Remove and install one at a time so you don't confuse the wires. Use a pick or a similar tool to remove the wires from the O2 sensors.My O2 sensor was stuck on really hard. I used PB Blaster to loosen the hold on both O2 sensors and let them sit for a day. Next day I went at it and it came off with ease. Only problem with using a Crows Foot is that you have to take it off at each turn. What makes it time consuming is that due to the wire, it will try to twist back into it's original position. My advice is to twist it with the Crows Foot, hold the O2 sensor with your spare hand and then reposition the Crows Foot on the O2 sensor and turn. Repeat. Keep doing this and it will eventually come off. Or you can just buy a good O2 sensor socket and get it off in less than 10 seconds.The new O2 sensor already comes with anti seize on the threads so you do not need to buy that. Leave the plastic caps on the thread on until you are ready to install so that you don't remove the anti seize.You need to push in while turning to get the sensor to thread in.

Why did you pick this product vs others?:Fit perfectly and works

Perfect OEM replacement for my 330CI. All issues resolved after replacing the oxygen sensors.

Works as advertised. Obd2 code went away. Threads came pre coated with anti seize.

Parfait tout fonctionne correctement

Nice to know some parts still fit as advertised.

Had a bad o2 sensor on my 2002 BMW 530i (code p0134). Found that the original sensor is Bosch. Purchased this as a replacement and my check engine light hasn't come back since.