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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 Wed, Oct-10-2018, 12:39:22 PM   #61
Obioban
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

Yep. Once I saw Chicago, I was going to suggest going to Performance Eurowerks, as well.

I don't think this issue has anything to do with your tire sizes.
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Old Wed, Oct-10-2018, 01:16:34 PM   #62
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

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Originally Posted by TheGenius46M View Post
No problem.

I donít want to sound like a dick, but throw out everything in this thread up until now. In this post you just gave me key info that is the root of your problem. This has nothing to do with your wheel or tire setup. Itís a geometry issue.

The fact that you just said the wheel is not straight, Iím now certain that is causing the dsc issues. I never read the codes to confirm this because when I did my tie rods and had the light, I already knew why it was on so I didnít care to read the codes, but this is my guess...

Given that the dsc system relies on a number of inputs including wheel speed sensors, pressure sensors, steering angle sensor, yaw, and a number of other things, if any of these are out of calibration, the dsc module doesnít know whatís going on to make accurate corrections so it goes into a limp mode or disables itself so it doesnít start making inadvertent corrections out of nowhere causing you to crash.

Now the fact that the wheel is crooked, the steering angle sensor thinks the wheel is turned but the yaw is zero so it thinks youíre understeering. Steering angle sensor drives the front wheels and speed sensors, so Iím not surprised they both are throwing codes.

Hereís what I recommend...

1) Get an alignment first and foremost. This will fix that problem in itself, but doing so will also allow the steering angle sensor to be reset and turn off the abs codes up front for the wheel speed sensors.

2) Are your wheel adapters 20mm or greater? I know a guy who ran a similar setup years ago without issues, but theyíre probably exaggerating your problem because theyíre directly affecting the scrub radius which messes up the steering and braking geometry. Iíve done a lot of research on this topic and played with it first hand to know effects good and bad. This has nothing to do with the wheel and tire setup. Youíre just thinking it is because itís the only variable youíre changing. In reality itís a small part of the larger issue being the alignment.

Not sure on the smg issue but have you tried the smg relay fix? Thatís typically the popping out of gear issue iirc.

Since youíre in Chicago I highly recommend taking the car to Alex Roy at Performance Eurowerks in Buffalo Grove. Heís a friend of mine and visited him and got to see some of his work when I was out there last year.

Alex is one of the best in the business with extreme attention to detail, and is one of the most knowledge individuals in the E46 community. I donít let many people work on my car, but Alex would easily be of the few Iíd trust. He will figure out your issue. Tell him a Corey sent you.


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Im a fool for not assuming they were all related to begin with. But If were being honest here, you have helped me understand this problem 100x more. I think it is clear what I have to do now, rather than sit here and scratch my head. Im going to get a hold of my alignment guy and start there. Ill put back on my wheels and limp car over there, or bring them and install there. The adapters are 20 mm up and 15mm rear. Offsets on tes are 40. Im running out of time here in Chicago before a nasty thing called winter hits so thats why Iíve been troubleshooting myself in an effort to figure it out fast rather than wait on a shop.

This all started with me thinking my smg unit took a sh*t. So we have come a long way since. I believe 100% that weird gear issue is a direct result of everything else dsc related. (Car isnít actually going into neutral such as when gear indicator shows it actually goes to 0). It doesnt realize its in neutral. I guess sort of similar to when smg knows a door is open so car is actually in neutral but stays in gear. Regardless Im positive its because of all these other things.

So gents alignment as soon as I can. And i hope to report back good news.
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Old Wed, Oct-10-2018, 05:56:42 PM   #63
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

Actually lucky enough to get in for an alignment tomorrow morning. Not my usual guy so I donít think Iíll be able to go into the shop and what not. So I think Iíll just drive with the teís on. Its about 40 minutes. As long as I stay on gas a little car shouldnít have any problems.
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Old Thu, Oct-11-2018, 05:42:27 PM   #64
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

Just got alignment. Straight wheel. But will angle sensor reset itself or do I need to reset?


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Old Thu, Oct-11-2018, 06:13:23 PM   #65
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

Nevermind, all lights went out! Issue went away! Im running my new Te37s and the car feels great. Alignment was all she needed. I truly cannot thank you guys enough. Next time youíre in Chicago Iíll buy you all some beers!!
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Old Fri, Oct-12-2018, 06:09:05 AM   #66
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

Great news. It's nice when it's a simple fix and not a thousand dollar parts chasing adventure...

Was your car ever in limp mode when everything was lit up? Or could you rev it hard and accelerate quickly... as long as it was in gear?
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Old Fri, Oct-12-2018, 06:16:44 AM   #67
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

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Great news. It's nice when it's a simple fix and not a thousand dollar parts chasing adventure...

Was your car ever in limp mode when everything was lit up? Or could you rev it hard and accelerate quickly... as long as it was in gear?


Tell me about it! But with all lights on car drove 100%. No limp mode at all. Issues only began after trying to run my new wheels. Lights and a crooked wheel were only thing that pointed to an issue.
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Old Fri, Oct-12-2018, 11:21:01 PM   #68
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

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Originally Posted by Joshe46 View Post
Nevermind, all lights went out! Issue went away! Im running my new Te37s and the car feels great. Alignment was all she needed. I truly cannot thank you guys enough. Next time youíre in Chicago Iíll buy you all some beers!!


Iíll take you up on that! Haha.

Had a feeling that was it once you said the alignment was off. Everything made sense.


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Old Sat, Oct-13-2018, 01:29:03 AM   #69
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

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Guys on facebook seem set that my tire sizes are out of the 1% rolling diameter difference allowance, is that possible?
Most likely explanation imo.
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Old Sat, Oct-13-2018, 04:34:13 AM   #70
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Default Re: Will the e46 dsc not accept a 275/35 rear and 265/35 front?!?

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Originally Posted by terraphantm View Post
Most likely explanation imo.


Yes but normally tpms will re adapt for that. With mine being disabled it wouldnít readapt. Just glad it resolved itself with alignment
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Discussing Will the e46 dsc not accept a 275/35 rear and 265/35 front?!? 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)