DIY: Replacing throttle actuator motor with pics - BMW M5 Forum and M6 Forums
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post #1 of 147 Old 9th May 2012, 09:44 PM Thread Starter
vantaam5
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Replacing throttle actuator motor with pics

Failing throttle actuators are quite common on the S85,so here is a DIY.

I am NOT liable if you screw up your car or health in any way following this DIY!


It is necessary to carry out initializing of the new throttle motor using DIS or ISTA after the replacement.



First,disconnect battery.

I also removed the micro filters and the panels for easier access to the back of the air boxes(it is possible to remove the vacuum lines without removing the panels,but it is easier when they are removed).

Then remove the air filter boxes(open the clamps on the air filter boxes,disconnect the MAFs and open the clamps of the pipes going into the air boxes)




Then disconnect the hoses on the back sides of the air boxes,the breather hoses on the sides and the hoses for the idle air in the front.

Use a flexible screw driver with a 6mm socket to open the clamps that attach the air boxes to the throttle bodies and remove the air boxes.



Cover butterflies with a cloth to protect debris falling in them.


Remove the bolt in the front and nut in the rear that hold the wiring loom down(tightening torque 10NM)



In the pic above the two vacuum hoses connecting to the air boxes are also visible.

Next is removing the plus wire coming from the jump starting point on bank1 as well as the second plus wire on the terminal(plasitc nut,see pic below,17mm socket,25NM tightening torque) and the cover of the ionic current unit on bank 2(10mm socket,tightening torque 10NM).

Also remove the bolt for the wiring loom(see pic below,10mm socket,tightening torque 10 NM)



Next disconnect the two plugs on the bank2 wiring loom side(mark then to connect the right ones again)



Disconnect also the bank 1 connector




Disconnect the throttle linkage of the actuator you replace(pry gently with a screw driver between linkage and ball pin of actuator) and remove the electrical connector.



The actuator has 3 bolts that attach it to the engine(10mm socket,tightening torque 10NM).

By moving the wiring loom carefully,it is possible to remove the bolts.




It is a bit tricky to remove and install the new actuator as it is very tight between the throttle bodies and the wiring loom.

But being careful,it is possible without breaking anything.

New actuator:



Assemble in opposite order to removing.

I usually leave the air filter boxes and air boxes away when initializing the new actuator.
This way also it is possible to see if everything works.



After everything is done,get yourself a beer and call it a day.

I would estimate it takes about 3-4h for the first timer.

Last edited by vantaam5; 9th May 2012 at 09:46 PM.
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post #2 of 147 Old 9th May 2012, 09:49 PM
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Great! send it to DIY thread.

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Last edited by Miguex; 9th May 2012 at 11:06 PM.
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post #3 of 147 Old 9th May 2012, 10:45 PM
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+1. Post in DIY thread.

Retired: 2006 e46 ///M3 Silver-Gray SMG (sold)

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post #4 of 147 Old 10th May 2012, 12:04 AM
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will add. Good DIY (though slightly advanced for the novice).

vantaam5, can you host the pics here rather than imageshack?

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post #5 of 147 Old 10th May 2012, 07:01 AM Thread Starter
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Quote:
Originally Posted by petesamprs View Post
will add. Good DIY (though slightly advanced for the novice).

vantaam5, can you host the pics here rather than imageshack?

This is nothing really for the novice,but a bit mechanical inclined owner.
Am changing on the same car also the Vanos high pressure oil pump,write up follows.


Will try to host the pics here.
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post #6 of 147 Old 10th May 2012, 02:38 PM
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Thanks. I am looking forward to your writeup for the vanos pump. Mine is still working fine but I went ahead and brought a spare just in case. Hopefully I dont need to buy any special tool when it is time to change mine out.
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post #7 of 147 Old 1st June 2012, 07:35 AM
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Do you need to clear the error data after replacing? The stealer wants to charge me $1,000 for the labor of replacing, I plan to get another merchanic shop to do this for me.
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post #8 of 147 Old 1st June 2012, 10:57 AM
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Hmmm, that car looks strangely familiar...

2005 E60 M5. Black/Black. Work in progress. So far: H&R springs, CF emblems, kidneys and side gills. AC Schnitzer rear spoiler. Eisenmann Sport mufflers, secondary cats and resonator removed. Tinted windows. Angelibrights.

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post #9 of 147 Old 1st July 2012, 04:16 PM
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post #10 of 147 Old 1st July 2012, 05:58 PM
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Quote:
Originally Posted by Fuddy View Post
how do you initialize the actuator after install?

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