Application Guide

1903038
©2019 Robert Bosch LLC, USA. All rights reserved. BOSCH is a registered
trademark of Robert Bosch GmbH and/or its affiliated entities.
Why do I need to replace my oxygen sensor?
It is important to replace your oxygen sensors at the
manufacturer’s suggested intervals or upon failure, whichever
occurs first. Prompt replacement will save you money in the
long term. Here’s how:
f If an oxygen sensor is not functioning properly, it may not
accurately measure the amount of fuel being consumed and
cannot efficiently regulate the consumption. This results in
lower MPG.
f A faulty oxygen sensor can cause your catalytic converter to fail
prematurely. The catalytic converter is responsible for
removing the harmful emissions from your exhaust gas.
Replacing a catalytic converter can cost thousands of dollars,
significantly more than most oxygen sensor replacements.
When to replace an oxygen sensor
Exposure to carbon, soot, harmful gases, antifreeze, chemicals
and thermal and physical shock will shorten the life of an oxygen
sensor. A worn sensor can result in reduced gas mileage, poor
engine performance and/or emissions test failure.
That’s why checking and — if
needed — replacing a worn-out
oxygen sensor with a Bosch
Premium Oxygen Sensor is an
important part of every
routine tune-up.
Side effects of a worn-out
oxygen sensor
f Produces excessive harmful exhaust emissions
f Wastes fuel
f Causes engine performance problems, such as
surging and hesitating
f Accelerates catalytic converter damage
Benefits of replacing an
oxygen sensor
f Reduces harmful emissions
f Saves money in fuel costs
f Improves engine performance
f Prevents premature failure of the
catalytic converter
What is the difference
between Wideband and
Air-Fuel sensors?
f A Bosch Air-Fuel Oxygen Sensor detects if your
engine is running rich or lean.
f A Bosch Wideband Oxygen Sensor measures the
precise amount of oxygen in the exhaust to tell
your ECU exactly how much fuel your engine needs
to operate at optimal combustion.
f Technical advances like the Bosch Wideband
Oxygen Sensor have allowed vehicle
manufacturers to increase fuel economy as well
as engine performance.
Trust the experience of Bosch
Since 1976 Bosch has produced over 1 billion oxygen
sensors. In addition to being the originator of this
important technology, Bosch is the leader and global
aftermarket supplier of oxygen sensors.