Are all Subaru O2 sensors the same?

Are all Subaru O2 sensors the same?
No, not all Subaru O2 sensors are the same. OEM oxygen sensors are made by the same manufacturer as your vehicle. They are the original equipment that your vehicle came with, and the materials, fitment, and quality are all identical to the part you are replacing. On the other hand, aftermarket oxygen sensors are produced by private companies, and they design their parts on their own and select materials at their discretion, which can affect the quality and fitment.
It’s important to note that there are different options for replacement O2 sensors for Subaru vehicles, including genuine OEM sensors and aftermarket sensors. Some users have reported issues with aftermarket sensors, while others have had success with them. For example, one user mentioned that they had better luck with Denso’s aftermarket sensors than with Bosch, while another user reported that they had to go through three aftermarket O2 sensors before having the Subaru dealership install a fourth, suggesting that the Bosch replacements weren’t good enough.
In summary, while there are aftermarket options available, it’s generally recommended to use OEM oxygen sensors for Subaru vehicles due to the assurance of quality, fitment, and materials that come with OEM parts.

Are all the oxygen sensors the same?

Each oxygen sensor has its own unique characteristics specific to its application. One generic oxygen sensor that may appear to be the same cannot be used to replace a range of these specific oxygen sensors.

Are aftermarket O2 sensors as good as OEM?

OEM Oxygen Sensors are Cheaper in the Long Run
Aftermarket parts are usually not covered by a warranty. If an aftermarket oxygen sensor fails prematurely, you have no choice but to buy a new one. The costs can add up over time. All in all, OEM is a safer bet than aftermarket when it comes to oxygen sensors.

Should you buy aftermarket O2 sensors?

Overall, buying an OEM oxygen sensor is a better and safer investment than an aftermarket one. It is less likely to fail, designed to work on your vehicle specifically, and is backed by the manufacturer’s warranty.

Do I have to replace all 4 O2 sensors?

Do I need to replace all of the sensors at once? It is best to replace O2 sensors in pairs. For example, if you replace the downstream left sensor, you should also replace the downstream right.

How many O2 sensors does a Subaru have?

Oxygen sensors are a critical component of the fuel and emissions systems on your vehicle. This tubular device is usually found connected to the exhaust manifold or to the catalytic converters. Subaru vehicles generally have two to five oxygen sensors.

Are the upstream and downstream O2 sensors the same?

The upstream O2 sensor is found before the catalytic converter, while the downstream O2 sensor is located after the catalytic converter. The upstream O2 sensor helps identify the vehicle’s fuel trim, which helps the engine computer calculate the ideal air-fuel ratio.

Who makes Subaru OEM O2 sensors?

Denso brand
The Denso brand is what Subaru uses as OEM.

Should I replace all O2 sensors at once?

Manufacturers recommend replacing O2 sensors in pairs (both Upstream or both Downstream). An older, slower sensor can cause an imbalance in the engine management system, leading to poor fuel economy and possible damage to the catalytic converter.

Should I replace both upstream oxygen sensors?

Manufacturers recommend replacing O2 sensors in pairs (both Upstream or both Downstream). An older, slower sensor can cause an imbalance in the engine management system, leading to poor fuel economy and possible damage to the catalytic converter.

Are oxygen sensor 1 and 2 the same?

What is Sensor 1 & 2? The sensor number is telling us where on the exhaust system the O2 sensor or Exhaust temperature sensor is mounted. The 1st sensor is located closest to the engine and the last is located at the rear of the exhaust system.