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Intake Air Ducts Replacement N52 Engine
 
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Pelican Technical Article:

Intake Air Ducts Replacement N52 Engine

Nick Czerula

Time:

1 hour1 hr

Tab:

$60

Talent:

**

Tools:

Set of sockets (10mm), wrenches, flathead screwdriver, 6mm nut driver

Applicable Models:

BMW X3 Sport Utility (2007-10)

Parts Required:

Intake air ducts, hose clamps

Hot Tip:

Work with a cool engine

Performance Gain:

Car will run well

Complementary Modification:

Change engine air filter

When an intake air duct cracks or tears, engine drivability suffers. You may have a rough idle, hard start or a check engine light that is on with fuel trim faults. The air entering through the tear in the duct is unmeasured and the engine management system cannot calculate fuel injection based on it. Therefore the engine drivability suffers.

When replacing your E83 X3 (N52 engine) intake air ducts, replace them with high quality parts. I have seen some imitation boots dry rot and crack open in less than a year after replacing.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

This tech article will show you how to replace the, fresh air intake, the intake air housing (blue arrow) and the intake air duct (yellow arrow).
Figure 1

This tech article will show you how to replace the, fresh air intake, the intake air housing (blue arrow) and the intake air duct (yellow arrow).

Start by removing the four T30 Torx fasteners (red arrows) for the fresh air plenum.
Figure 2

Start by removing the four T30 Torx fasteners (red arrows) for the fresh air plenum.

Lift the intake plenum up and remove from the radiator support in direction of red arrow.
Figure 3

Lift the intake plenum up and remove from the radiator support in direction of red arrow.

Then, remove the four T30 Torx fasteners (red arrows) for the intake air duct.
Figure 4

Then, remove the four T30 Torx fasteners (red arrows) for the intake air duct.

Push the fresh air plenum toward the firewall (red arrow) to remove from the radiator support.
Figure 5

Push the fresh air plenum toward the firewall (red arrow) to remove from the radiator support.

Lift the plenum up and detach the duct at the intake air housing as you lift.
Figure 6

Lift the plenum up and detach the duct at the intake air housing as you lift. 

Unclip the four air filter housing retaining clips (red arrows).
Figure 7

Unclip the four air filter housing retaining clips (red arrows). Use a small flathead screwdriver to lever them open

Loosen the air duct clamp (red arrow).
Figure 8

Loosen the air duct clamp (red arrow).

Disconnect the mass air flow sensor electrical connector by gently levering the release tab open using a flathead screwdriver (inset) and pulling it straight out.
Figure 9

Disconnect the mass air flow sensor electrical connector by gently levering the release tab open using a flathead screwdriver (inset) and pulling it straight out.

Once you release all the clips, lift the intake air housing lid and pull it out of the air duct (red arrow).
Figure 10

Once you release all the clips, lift the intake air housing lid and pull it out of the air duct (red arrow).

Lift the intake air housing and remove it from the engine compartment (red arrow).
Figure 11

Lift the intake air housing and remove it from the engine compartment (red arrow). Wiggle as you pull up to detach the two rubber mounts. When installing, be sure the half-round rubber insulator (blue arrow) is in place on the frame rail.

Next remove the intake air duct from the throttle housing duct.
Figure 12

Next remove the intake air duct from the throttle housing duct. Use a 6mm nut driver (I prefer a flexible one) and loosen the clamp (red arrow).

Pull the duct off to remove.
Figure 13

Pull the duct off to remove. When installing, be sure to align the tab on the throttle housing duct (red arrow) and the slot in the intake air duct (blue arrow). 

Next remove the intake air duct from throttle housing.
Figure 14

Next remove the intake air duct from throttle housing. Loosen the clamp (red arrow) almost all the way. Once loose, remove the duct from the engine. Install the new duct in the same position as the old one, be sure it is evenly installed over the lip of the throttle housing. Then reassemble the intake air duct and air filter housing in reverse order of removal. Check that the ducts, hoses and the electrical harnesses are routed as they were before and check that the air ducts are properly sealed.

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Page last updated: Sat 4/29/2017 03:18:01 AM