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Intake Air Temperature Sensor Replacement
 
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Pelican Technical Article:

Intake Air Temperature Sensor Replacement

Steve Vernon

Time:

30 minutes30 mins

Tab:

$25

Talent:

*

Tools:

5mm Allen

Applicable Models:

VW Golf GTI (2000)
VW Golf GTI 1.8T (2002-05)
VW Golf GTI 20th Anniversary (2003)
VW Golf GTI 337 (2002)
VW Golf GTI GLS (2001)

Parts Required:

New Sensor

Hot Tip:

Work on a cold engine

Performance Gain:

Car runs like normal again

Complementary Modification:

Replace MAF Sensor

If you are starting to have trouble with your idle there is a good chance the Intake Air Temperature Sensor is starting to go bad. If you are getting an error code indicating the IAT then it is time to clean or replace the sensor. The sensor is located just behind the throttle body in the intake manifold and sees a lot of oil and junk get deposited on it. It is possible to clean the sensor with MAF cleaner or simply replace it. The sensor is not expensive and many people just swap in a new one rather than buy a can of MAF cleaner and hope it does the trick.

Begin by locating the intake air temperature sensor just behind the throttle body.

Disconnect the wiring harness by squeezing in on the clips and pulling the harness off.

Next use a 5mm Allen wrench and unscrew the single bolt holding the sensor to the intake manifold and pull the sensor straight out from the manifold.

You can now attempt to clean the sensor or replace it with a new one. The sensors develop an amber looking coating on them and over time with can harden to a glass like coating. Carefully use the MAF cleaner and some Q-tips to clean both wires. If you break any of the wires you will need to replace the sensor.

Installation is the reverse of removal.

Begin by locating the intake air temperature sensor (yellow arrow) just behind the throttle body.
Figure 1

Begin by locating the intake air temperature sensor (yellow arrow) just behind the throttle body.

Disconnect the wiring harness by squeezing in on the clips (yellow arrows) and pulling the harness off.
Figure 2

Disconnect the wiring harness by squeezing in on the clips (yellow arrows) and pulling the harness off.

Next use a 5mm Allen wrench and unscrew the single bolt (yellow arrow) holding the sensor to the intake manifold and pull the sensor straight out from the manifold.
Figure 3

Next use a 5mm Allen wrench and unscrew the single bolt (yellow arrow) holding the sensor to the intake manifold and pull the sensor straight out from the manifold.

You can now attempt to clean the sensor or replace it with a new one.
Figure 4

You can now attempt to clean the sensor or replace it with a new one. The sensors develop an amber looking coating on them and over time with can harden to a glass like coating. Carefully use the MAF cleaner and some Q-tips to clean both wires. If you break any of the wires you will need to replace the sensor.

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Page last updated: Fri 1/20/2017 02:37:43 AM