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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jan-03-2019, 06:12:44 PM   #1
rbg
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Default Aluminum steering coupler

As there is a CMP GB going on I am really considering getting their alu steering coupler. I donít care much for NVH, but people say about accident safety and etc. I was really wondering if it that bad? If you look into steering column it should collapse itself and I would not imagine that that piece of rubber compare to the solid part will make any difference.
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Old Thu, Jan-03-2019, 06:46:32 PM   #2
hbalzanya69
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Default Re: Aluminum steering coupler

It will eventually break your steering column. If you want to delete the rubber steering bushing purchase a Z4M coupler, it's a U joint instead of a rubber coupler.
Z4M Steering Coupler

Last edited by hbalzanya69; Thu, Jan-03-2019 at 06:52:24 PM.
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Old Thu, Jan-03-2019, 06:58:31 PM   #3
Obioban
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Default Re: Aluminum steering coupler

Has anyone tried using the e28/e35 M5 U joint with the M3 telescoping shaft?

If it fits, same result as the Z4M at 1/3 the price, with an easier install to boot.

M3: http://www.realoem.com/bmw/enUS/show...diagId=32_0645

Z4: http://www.realoem.com/bmw/enUS/show...diagId=32_1382

e28: http://www.realoem.com/bmw/enUS/show...diagId=32_0399
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Old Thu, Jan-03-2019, 08:20:17 PM   #4
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Default Re: Aluminum steering coupler

Quote:
Originally Posted by Obioban View Post
Has anyone tried using the e28/e35 M5 U joint with the M3 telescoping shaft?

If it fits, same result as the Z4M at 1/3 the price, with an easier install to boot.

M3: http://www.realoem.com/bmw/enUS/show...diagId=32_0645

Z4: http://www.realoem.com/bmw/enUS/show...diagId=32_1382

e28: http://www.realoem.com/bmw/enUS/show...diagId=32_0399
Update: the e28/e34 joint does not fit.
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Old Thu, Jan-03-2019, 08:30:08 PM   #5
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Default Re: Aluminum steering coupler

Does it not fit because a chamfer has not been added for the securing bolt? I recall reading about something like this recently.
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Old Thu, Jan-03-2019, 08:37:16 PM   #6
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Default Re: Aluminum steering coupler

I bought an aluminum coupler with the intent of testing it someday, but I agree with the other comments that a U-joint is the right way to go if you want to eliminate the rubber guibo. Condor sells one.

Aside from losing brakes, losing steering is about the worst thing that can happen in a car, especially on a racetrack. I'm not convinced that the increased risk is outweighed by what is likely a nominal improvement in steering response.
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Old Thu, Jan-03-2019, 08:44:19 PM   #7
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Default Re: Aluminum steering coupler

Does the Z4M then not come with any type of steering dampening stock?
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Old Thu, Jan-03-2019, 08:47:34 PM   #8
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Default Re: Aluminum steering coupler

I may have been mistaken about the safety aspect (I misunderstood what bmw was emphasizing in various docs), but I do think a u joint would be a better solution than a disc.

However, it’s also important to retain that lower steering shaft - that does indeed play a safety role.

Edit: Looks like the condor piece would work well - seems to retain the stock lower shaft unlike their solutions for other models
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Last edited by terraphantm; Thu, Jan-03-2019 at 11:28:11 PM.
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Old Thu, Jan-03-2019, 09:48:25 PM   #9
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Default Re: Aluminum steering coupler

So z4M U-joint can be used or not? Looking on the realOEM I just can understand what part and how to install on our cars.
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Old Fri, Jan-04-2019, 12:38:07 AM   #10
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Default Re: Aluminum steering coupler

Quote:
Originally Posted by terraphantm View Post
I may have been mistaken about the safety aspect (I misunderstood what bmw was emphasizing in various docs), but I do think a u joint would be a better solution than a disc.

However, itís also important to retain that lower steering shaft - that does indeed play a safety role.

Edit: Looks like the condor piece would work well - seems to retain the stock lower shaft unlike their solutions for other models
I think it does serve a safety purpose. A crumple zone and airbag wouldn't do much good if the steering column turned into a 4 foot spear that would end up in the back seat in a crash.
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Discussing Aluminum steering coupler in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)