Bmw e46 throttle housing replacement bmw 325i (2001-2005), bmw 325xi (2001-2005), bmw 325ci (2001-2006), bmw 325ti (2001-2004) pelican technical article gas x strips ingredients


• M54 and M56 engine (2001-2005 models) are equipped with an electronic throttle (drive-by-wire). There is no throttle cable. Instead, potentiometers in the accelerator pedal module (PWG) communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. Based on pedal position and movement, the ECM communicates throttle opening to the throttle housing at the intake manifold.

A faulty throttle housing can cause a number of problems for the engine, 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 the function of your crankcase breather valve and inspect all the breather hoses. If a breather hose cracks or fails, the air leak can cause a rough idle or engine stalling. On electronic throttle vehicles, inspect the throttle housing electrical connector condition; the pins have a tendency to lose tension. The best way to check pin tension is with a pin fit kit. However, this may not be available to you so you can visually inspect the pins and see if they are spread open or bent.

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 you are 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.

I pulled the upper intake hose and can see the actual throttle blade. With key in the ON position, throttle does not respond to input on the accelerator pedal – is it supposed to? Are there any troubleshooting procedures for the throttle assembly? I would like to know if it is bad before just randomly replacing parts.

Followup from the Pelican Staff: You can check throttle angle via scan tool and using a scope. You can also scope the throttle motor H-bridge circuit. Here’s some info I found on the H-bridge:

Comments: Need help please, on my e46 m52 drive by cable. Its giving my a code p1580 saying it’s mechanically stuck, but I cleaned it twice and there’s an adjustment screw that was missing so I put 1 in can that be the cause of it rough idling from 1k-13rpm its bouncing

Comments: Hi, I have a 1999 328i with cable. I have replaced the cable as the old one was stretched. The new cable’s nipple has popped out of the housing on the throttle body even though it was tensioned correctly. Is this a common fault on this model or is there something else I should be considering? Regards Robin

Comments: Ok so I have a 1994 318i. I’ve pulled the motor and dropping in a motor from a 2001 330i. I realize I need a new pedal with electronic potonsiometer. Will the pedal assembly from the e46 plug and play.?i also realize I will have to do some wire spicing from old harness to new harness. And driveshaft will need customizing. Exhaust etc. Anything else you might think of would be a big help.

Followup from the Pelican Staff: I would try to adapt the 330i engine to an earlier throttle cable type engine management system, then adapt the E30 cable to connect to the throttle body, you will lose a little bit in diameter but in that car power should not be a big issue! I will create a post in our forums and hopefully another member can help out. Sounds like a very cool project! – Casey at Pelican Parts

Followup from the Pelican Staff: I would disconnect the cable from the throttle housing, then check if the pedal is still jammed. You have to determine what part of the system is hung up. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.

Comments: SOLVED.E46328i M52TU throttle body gasket changed.Engine starts idols fine but when REV Up engine rough won’t rev up. P0120,P0220 code thrown.I reconnected electrical connector by first pushing it in then turning outer collar to match white arrow marks.Car idles but wont rev up!Solution I did throttleadaption KEYON pos2 for 10 secs keyoff 5secs keyon 10secs turnoff then start engine. Also did pedal down key on pos 2 for 10secs then keyoff then started and i could rev the engine to 3000RPM.Codes P0120,P0220 cleared and not returned.

after several days of occasional stall/surge and then the pending P1638 I had a catastrophic stall with CEL and EML/traction/brake, limp mode?]…..restart would clear EML/traction/brake lights but upon trying to drive on, the stall would come back and EML/traction/brake and limp mode would return…nursed it home and codes are P1638/P1639

I have pulled and cleaned a not very dirty ICV but there is no carbon on the throttle body, closes perfectly, no hangups and previously was running flawlessly, no codes or idle/performance issues, driven 110+ miles a day for commute to/from work 1925xx miles total

Followup from the Pelican Staff: Not necessarily. It depends on how it fails as to what code is set. I t does sound like you throttle housing or electrical harness is faulty. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.

Comments: Thanks Nic for great articles.On E46 328i M52TU with throttle cable took out throttle body to change gasket removed cable too.Reinstalled throttle and reconnected cable to TB and to ICV bracket. Engine starts idols fine but when open throttle engine rough doesnt want to rev up. P0120,P0220 code thrown. The electrical connector to TB really didnt seem to connect tightly.Any advice?

Followup from the Pelican Staff: The faults are for throttle position and accelerator position. I would check the electrical connector on the throttle body. Inspect the rubber seal inside the connector, it may out of place, preventing a solid connection. – Nick at Pelican Parts

Comments: I have the early model m52 with the ms42.0 cable throttle. The throttle Lever pictured in pic # 15 had broken, no longer able to hold the throttle cable ball. Can just the throttle lever be replaced? Or must I replace the throttle body. Thanks

Comments: After doing this for the Cvv my car goes into limp mode as soon as I touch the accelerator. It’s giving me an error code for the valve being mechanically stuck, yet I removed the boot to look and I can see the valve opening when I press the gas. Could this be my icv or did something go wrong when I adjusted the throttle cable?

Comments: I have 01 325I Auto/steptronic. You say I have MS43, If I am only replacing the Throttle Housing Gasket, do I need to complete step/figure 21? Is it safe to drive the car to a Bmw dealer to perform or do I have to have it towed? I do not have a Scan Tool.

Comments: im trying to find out if the error code i got from my peake scanner tool has to do anything with the intake boot? i read that most of the time if the intake boot has a small leak or a hairline crack it could trigger limp mode when flooring the throttle. is that true? cuz i cant seem to find any problem on it. the error code i got from my peake tool is 2882, 2883, and 28A2. hope you could help me with my problem. i dont know whats the common problem with e46 to go into limp mode. lastly i heard having both o2 sensors break down is not likely to happen so both error code 2882 and 2883 saying bank 1 and bank 2 could not mean to replace both precat o2 sensors right? or am i wrong? please explain or let me know what i should do.