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Boost Pressure Sensor Replacement
 
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Pelican Technical Article:

Boost Pressure Sensor Replacement

Jared Fenton

Time:

2 hours2 hrs

Tab:

$50

Talent:

**

Tools:

5mm hex driver, 8mm socket, flathead screwdriver

Applicable Models:

Audi A6 Quattro (2000-04)

Parts Required:

Boost Pressure Sensor

Hot Tip:

Inspect the rubber intake boot for cracks

Performance Gain:

Better running engine

Complementary Modification:

Replace intake boot

The boost pressure sensor is used to determine the pressure inside the intake manifold and send a signal to the vehicle's ECU. Over time, the boost pressure sensor can begin to fail, resulting in drivability issues. Replacing the sensor is relatively easy and should take no more than a few hours.

You'll also want to inspect the rubber intake boot the sensor seats inside. It's common for cracks to develop over time. Accessing the sensor requires you to remove the engine cover. See our article on Engine Cover Removal for more information.

The boost pressure sensor (BPS) sits at the front of the engine as shown here.
Figure 1

The boost pressure sensor (BPS) sits at the front of the engine as shown here. Press the tab on the electrical connector (green arrow) and pull it off the BPS.

Now loosen and remove the two 8mm nuts (green arrows) and the 5mm hex screws (purple arrow).
Figure 2

Now loosen and remove the two 8mm nuts (green arrows) and the 5mm hex screws (purple arrow). Pull the retaining plate off the BPS. Be sure to grab the washers behind the nuts.

On our project car, the BPS was secured to the rubber intake boot with a generic hose clamp (green arrow).
Figure 3

On our project car, the BPS was secured to the rubber intake boot with a generic hose clamp (green arrow). Loosen or cut the hose clamp (where applicable) and pull the BPS out of the intake boot. Be sure to grab the threaded backing plate (purple arrows) under the BPS. At this point, you should inspect the intake boot for any cracks or rips. Replace the boot if you come across this. See our article on Throttle Body Cleaning for more information.

And here's the finished result with the BPS removed from the engine.
Figure 4

And here's the finished result with the BPS removed from the engine. Installing the new BPS is the reverse order of removal. Be sure to replace or reuse the hose clamp securing the BPS in place.

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