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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-22-2012, 10:05 AM   #1
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Join Date: Jun 2011
Location: North Hollywood
Posts: 82
My Ride: E46 M3
Sequential M Gearbox indicator light

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Hello Everyone,
Does anyone know some of the basic issues that happen when this light turns on. I read the Owners Manuel and it says it is my Sequential M Gearbox with Drivelogic. My car drives well still but this light came on and stays on while driving. What are some of the basic issues that occur with this? IS it a big problem $$$$? has anyone had this happen. its a E46 M3 smg

Please help guys,
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Old 05-22-2012, 09:17 PM   #2
SL Blak Soldier
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Join Date: Oct 2006
Location: Woodland Hills < SFV < LA < SoCal
Posts: 14,633
My Ride: 3 Pedal SG S54B32
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I can't say i know what the problem is, but i see you're in NoHo, give Mini Corsa a call and they'll be able to read the codes and tell you whats up. let them know Raj sent you.
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Old 05-24-2012, 01:12 AM   #3
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Join Date: Oct 2009
Location: Oakdale, MN
Posts: 778
My Ride: 02' M3 SMG, 02' 330i
Only time I ever saw that light on mine was after about 20 minutes on the track. Gave it some time to cool down, and bam I W's good. So no real help there. Just go to a good Indy and get the code read from the smg software, that'll tell you what the problem is.
330i - AA Tuned, Headers, UUC Stage I LW FW, e36 M3 Clutch, UUC SS Clutch line, BMW Performance Intake, Evo Sport Pulleys, BMW Performance Cross-Drilled Rotors, Hawk HPS, BW SS Brake Lines, BW Solid Guide Bushings, BMW Performance CF Strut Brace, H&R Sways, H&R Sport Springs, Bilstein Sport Shocks, Powerflex Bushings, LED Tails, Clear Sides/Turns, Black Grill, Mtech 2, CF Splitters

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Old 05-24-2012, 10:05 AM   #4
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Join Date: Jun 2011
Location: North Hollywood
Posts: 82
My Ride: E46 M3
thank you very much for all the posts guy!!
I went to the mechanic and had the code read and it said 15-21 and when we looked it up it said something about a relay. then he dismissed the code and never turned on again. The mechanic thinks there might have been a shortage of power from my battery and it probably tripped the indicator on. I'm going to drive it a bit more and see if anything happens. but the car drives perfect still with/without indicator on.

I truly appreciate everyone for helping me out and being so cool!!
Thanks guys
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Old 02-11-2014, 01:41 AM   #5
M3 rebel
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Join Date: Dec 2012
Location: Walnut creek
Posts: 5
My Ride: M3
Hi everyone, this light went on in my car but it still drives good - I tried resetting driving at 50 mph. Shift to neutral and pull both paddles but it didn't do anything. I disconnected the battery for about 10 minutes and it didn't reset. I also read about the relay, but I'm not sure where it is- can someone help me with this?
Thank you!

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Old 03-19-2014, 10:36 PM   #6
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Join Date: Jul 2013
Location: Fort McMurray
Posts: 29
My Ride: 2005 E46 M3
Yeah sounds like the relay man. I just went through this with my car. If no codes are coming up for SMG pump pressure or anything its the relay. Super easy fix. Got mine sent to me in 2 days basically plug and play and Viola. Here's the relay you need. It installs in the drug bin.

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