Denso 234-4018 Oxygen Sensor for GM Downstream with 4-Wire Female Plug

Been working great for a few months now.

I purchased these for my 2002 Chevrolet Avalanche. I bought all four. I installed them five months ago. So far all is working well, no more warning light.

good part

Wished they lasted longer than they do on my 01 suburban but these are not expensive and somewhat easy to install if ramps available. Large crescent wrench needed and be sure to apply thread lock included.

Installed on Passenger Side and work so far as with all products time will tell. But they fit just like originals and initially worked. I also installed both Oxygen Sensors on Passenger side and both worked.

Purchased these on advice from auto mechanic after six months of engine code faults for O2 sensors fault. Previously replaced individual sensors of other manufacturers with limited or short success. Purchased all 4 from another company, caused my catalytic converters too go bad! Cost $1000.00 to replace. Still had O2 sensor faults, mechanic suggested I get new ones under warranty. I ordered 4 new Bosch brand sensors, installed and still had fault after reset. Mechanic stated Denso brand was the manufacturers suggested brand. Installed all 4 new Denso sensors and problems solved so far. I suggest you only buy Denso! What a nightmare thinking that other brands were of high quality and correct for my vehicle as there description stated. Only installed Bosch for a couple of days while diagnostic testing, faults keep coming back after reset. Sent back for refund after new Denso were installed and resolved issue immediately. Costly mistake using other brands for short period while looking for other issues, like broken wires,computer, replacement with no positive results. Totally destroyed converters, chunks of catalyst material blowing out tailpipe. What an expensive lesson learned 😪!

Fits perfectly as described excellent seller

These were ordered for an 2002 Tahoe 5.3. Am!@*n stated (and still states) they will fit this truck. They do not. The factory female plug on the OEM harness has provisions for two alignment slots. These O2 sensors have one alignment slot which is too wide to fit in just one of the slots on the harness plug. I discovered these have a black plug on them and the correct ones have the grayish white plastic plug.Additionally, if your factory sensors and harness have the grayish-white square plug on all four sensors, then your truck was probably assembled in Canada. The same truck built in the US uses a square four-prong plug (like these) on one set of sensors and a flat four-prong plug on the other two sensors. This is the difference to pay attention to when ordering these sensors. Amazon does not have provisions to recognize the difference between US vs. Canadian-assembled trucks and unfortunately, when it comes to these trucks and sensors there is a difference.The correct Denso part number for these 4 square plug sensors is 234-4650. They have the grayish-white plug ends and the correct two-slot alignment pieces to fit the harness plug. These are the best quality and are plug-and-play for the Canadian built harness. Hope this helps future users!