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M62 8-Cylinder Engine Mass Air Flow Sensor Replacement
 
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Pelican Technical Article:

M62 8-Cylinder Engine Mass Air Flow Sensor Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$150

Talent:

**

Tools:

flathead screwdriver, 10mm socket and ratchet

Applicable Models:

BMW X5 Sport Utility (2000-06)

Parts Required:

Mass air flow sensor, engine air filter

Hot Tip:

Work with a cool engine; lear engine fault codes when done

Performance Gain:

Car will run well

Complementary Modification:

Replace engine air filter, inspect intake air ducts for cracks or dry rot

The mass air flow sensor monitors air flow into the engine and creates a digital signal for the DME. Mass air flow sensors accuracy skews over time and can lead to fault codes or drivability problems. When replacing, inspect the rubber intake air ducts for cracks or dry rot. If the intake air ducts are faulty, replace them first and see if the problem you are having is remedied. Note: An un-metered air leak downstream of the mass air flow sensor will set codes similar to a faulty mass air flow sensor.

In this article, I'll go over the steps involved with replacing and testing the engine mass air flow sensor on the BMW X5 with an M62 8-cylinder engine.
Figure 1

In this article, I'll go over the steps involved with replacing and testing the engine mass air flow sensor on the BMW X5 with an M62 8-cylinder engine. Be sure to work with a cool engine. The mass air flow sensor is located at the right side of the engine compartment (green arrow).

Working at the fresh air intake, remove the four plastic rivets (green arrows).
Figure 2

Working at the fresh air intake, remove the four plastic rivets (green arrows). Use a pair of pliers (inset) to remove the center rivet. Once all the center rivets have been removed, pull the duct up to detach it from the vehicle.

Then lift the duct up on the left side while detaching it from the duct (green arrow) on the right side.
Figure 3

Then lift the duct up on the left side while detaching it from the duct (green arrow) on the right side.

Working at the mass air flow sensor, loosen the hose clamp using a flathead screwdriver (green arrow).
Figure 4

Working at the mass air flow sensor, loosen the hose clamp using a flathead screwdriver (green arrow).

Disconnect the mass air flow electrical connector by squeezing the retaining tabs and pulling the connector straight off the sensor.
Figure 5

Disconnect the mass air flow electrical connector by squeezing the retaining tabs and pulling the connector straight off the sensor.

Using a flathead screwdriver, unclip the top spring clip (green arrow) that holds the mass air flow sensor into the air filter housing lid.
Figure 6

Using a flathead screwdriver, unclip the top spring clip (green arrow) that holds the mass air flow sensor into the air filter housing lid. Then, unclip the lower spring clip that holds the mass air flow sensor into the air filter housing lid.

Working at the throttle housing duct, loosen the hose clamp using a flathead screwdriver (green arrow).
Figure 7

Working at the throttle housing duct, loosen the hose clamp using a flathead screwdriver (green arrow).

Next you will have to rotate the throttle housing duct up toward the left side of the vehicle in the direction of the green arrow.
Figure 8

Next you will have to rotate the throttle housing duct up toward the left side of the vehicle in the direction of the green arrow. This will detach it from the mass air flow sensor. You can leave the duct in the up position, connected to the throttle housing for the remainder of the procedure.

Remove the mass air flow meter from the air filter housing by sliding it in the direction of the green arrow.
Figure 9

Remove the mass air flow meter from the air filter housing by sliding it in the direction of the green arrow. Be careful not to lose the sealing O-ring (yellow arrow).

Once the mass air flow meter is removed, check that the O-ring is in good shape and not worn or swollen.
Figure 10

Once the mass air flow meter is removed, check that the O-ring is in good shape and not worn or swollen. Replace if needed. Install the sealing O-ring into the air filter housing. Be sure the O-ring is properly seated behind the retaining tabs (green arrows). Install the new mass air flow sensor into the air filter housing. If the O-ring gives you a hard time going in, apply a small amount of dish soap to the O-ring. It will slide right in and the soap will not damage the O-ring. Install the ducts in the reverse order of removal. Take the vehicle for a test drive. Then recheck your intake air duct connections.

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Page last updated: Mon 12/5/2016 02:23:31 AM