Bosch 0281004221 Oxygen Sensor

Description

The Bosch 0281004221 Oxygen Sensor is a vital component in a vehicle's emissions control system. It monitors the amount of oxygen in the exhaust gases, sending this data to the engine control unit (ECU) to help maintain the correct air-fuel mixture for optimal engine performance and reduced emissions. This sensor is commonly used in a variety of gasoline-powered vehicles. This oxygen sensor offers precise readings, contributing to improved fuel efficiency, lower emissions, and enhanced engine durability. It is manufactured in Germany and measures 134 x 44 x 99 mm.

Key Features & Benefits

These little guys actually measure the amount of unburned oxygen in your exhaust. There’s one typically before the catalytic converter and sometimes one after. They send that information to your car’s computer – the engine control unit, or ECU. The ECU then uses that reading to adjust the air – fuel mixture going into the engine. It’s a feedback loop; the sensor tells the computer what’s happening, and the computer adjusts to keep things running smoothly. Think of it as a key part of keeping your engine happy and efficient. It’s constantly working to make sure your engine isn’t running too rich—too much fuel—or too lean—not enough fuel. It’s a crucial piece in the whole emissions control system, making sure your car isn’t polluting more than it should. It works closely with the catalytic converter to minimize harmful emissions.

Symptoms, Risks & Replacements

If this sensor goes bad, a lot of things can start to happen. You’ll likely see your check engine light come on, and your gas mileage will definitely take a hit because your engine isn’t running efficiently. It can even damage your catalytic converter over time if the mixture is consistently off. It acts like a shield for that more expensive part. You’ll notice if it’s failing because your car might run rough, hesitate when you accelerate, or just generally feel sluggish. If you’re looking to replace one, you can often find a good selection at places like Fixparts Online, and they’re usually not too difficult to swap out, but it depends on where it's located on your vehicle.

Warranty Information

Bosch Oxygen Sensor (MPN 0281004221) comes with a 1-year warranty.