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Oxygen Sensor

Bosch Oxygen Sensor 13723

BOSCH
Availability:
5+ in stock, ready to be shipped

Ships same or next business day

SKU 13723
$99.95 - $99.95
$99.95
$99.95 - $99.95
$99.95
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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BOSCH

Oxygen Sensor

This product also goes by these part numbers: 993 606 118 01, 99360611801, 13723

This part also goes by the following cross reference.

Cross Reference Part Number: 99360611801

Fits These Vehicles 15 applications
8L A3
Make Model Engine Years
AUDI A3 (8L1) 1.6 1996–2003
AUDI A3 (8L1) 1.8 1996–2003
AUDI A3 (8L1) 1.8 T 1996–2003
AUDI A3 (8L1) 1.8 T quattro 1996–2003
MK4 Golf
Make Model Engine Years
VW GOLF IV (1J1) 1.4 16V 1997–2004
VW GOLF IV (1J1) 1.8 1997–2005
VW GOLF IV (1J1) 1.8 T 1997–2005
VW GOLF IV (1J1) 1.6 1997–2004
Polo
Make Model Engine Years
VW POLO Variant (6V5) 1.6 1997–2001
Porsche
Make Model Engine Years
Porsche 911Carrera 3.6H6 1996–1998
Porsche 911Carrera 3.4H6 1999–1999
Porsche 911Carrera 4 3.6H6 1996–1999
Porsche 911Carrera S 3.6H6 1998–1998
Porsche 911Carrera 4S 3.6H6 1996–1998
Porsche 911Targa 3.6H6 1996–1998

Fitment data last updated: 2026-10-02

Fits 15 vehicle applications Check vehicle fitment before ordering View fitment

About this Oxygen Sensor

The BOSCH 13723 oxygen sensor measures the oxygen in the exhaust so the engine computer can keep the fuel mixture correct. Sensors before the catalytic converter control the mixture; sensors after it monitor the converter's efficiency.

Frequently asked questions

What does an oxygen sensor do?

It reports how rich or lean the exhaust is, and the engine computer adjusts fuel delivery in response. A faulty sensor can make the engine run too rich or too lean.

What are the signs of a failing oxygen sensor?

A check-engine light with oxygen-sensor or fuel-trim codes, poorer fuel economy, rough idle, or a failed emissions test. Exhaust leaks near the sensor can cause similar codes, so check for those too.

How do I know which sensor I need?

Sensors are specific to their position: upstream (before the catalytic converter) or downstream (after it), and on V engines, bank 1 or bank 2. The fault code usually identifies the position; check the product details for the position this sensor fits.

Can I replace an oxygen sensor myself?

Usually, yes, using an oxygen-sensor socket. Many new sensors come with anti-seize already on the threads; if not, use a sensor-safe compound only on the threads, and keep it off the sensor tip.

How do I make sure this oxygen sensor fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

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