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N52 Engine Throttle Body Replacing
 
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Pelican Technical Article:

N52 Engine Throttle Body Replacing

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

****

Tools:

Set of sockets, Flatblade screwdriver, 10mm socket

Applicable Models:

X3 E83 (N/A-A)
X3 E83 facelift (2007-10)

Parts Required:

Throttle body, sealing O-ring

Hot Tip:

Work with a cool engine.

Performance Gain:

Remedy fault codes and restore engine performance

Complementary Modification:

Replace air filter.

A faulty throttle housing can cause a number of problems, from a check engine light to a rough or surging idle. Before you condemn your throttle housing, be sure to inspect all the intake air ducts. They should be well sealed and free from cracks or tears. Check function of your crankcase breather valve and inspect all breather hoses. If a breather hose cracks or fails, the air leak can cause a rough idle or engine stalling. You may have to remove the throttle housing to access other components such as the crankcase breather valve and crankcase breather hoses.

In this article, I'll go over the steps involved with replacing the throttle body on BMW X3 N52 engine equipped models. Make sure your engine looks like the ones in the pictures before beginning work. Be sure to work with a cool engine.

Remember your car may have been serviced before and parts 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. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve as they grow older. 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.

Remove engine covers. See our tech article on engine cover removal.

The throttle housing (body) is located on the left side of the engine (red arrow).
Figure 1

The throttle housing (body) is located on the left side of the engine (red arrow). You will have to remove the intake air housing and ducts to access it.

Remove the air filter housing and the intake air ducts (red arrow).
Figure 2

Remove the air filter housing and the intake air ducts (red arrow). See our tech article on intake duct removal.

The final duct at the throttle housing can be left on and removed once the throttle housing is out.
Figure 3

The final duct at the throttle housing can be left on and removed once the throttle housing is out. If you want to remove it, loosen the flathead clamp screw and remove the duct (red arrow).

Working at the throttle housing (blue arrow), remove the electrical connector (red arrow) by pressing the release tab and pulling it straight off.
Figure 4

Working at the throttle housing (blue arrow), remove the electrical connector (red arrow) by pressing the release tab and pulling it straight off.

Remove four 10mm throttle body fasteners (green arrows).
Figure 5

Remove four 10mm throttle body fasteners (green arrows).

Once you have removed throttle body fasteners, remove throttle body from engine.
Figure 6

Once you have removed throttle body fasteners, remove throttle body from engine. Be sure to replace throttle body sealing O-ring (green arrow). Install throttle housing in reverse order of removing. Be sure electrical connector is properly engaged, listen for audible click. It is a good idea to allow the throttle body to perform its initial checks prior to starting the vehicle. Simply turn key on and wait 30-60 seconds until you her the throttle body make a click clack sound, then start the vehicle.



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Page last updated: Mon 7/24/2017 03:27:45 AM