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The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 06-04-2017, 10:17 AM   #1
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Join Date: Jun 2017
Location: Malta
Posts: 2
My Ride: M3 SMG Convertible
Another Smg post

Hi to all, just read about 20 pages about Smg problems, but none like mine.
Gear change a bit slow to react
Was setting off in 2nd, but have been told I can change that
A few unusual knocks when changing gear, feels like from the rear diff
Yesterday after driving for 10 mins, I tried to change gear manually from the stick and it wouldn't change gear, tried from the paddles and still wouldn't change. Turned the car of and on and car got stuck in first gear, would only change in 0. Got engine management light and smg cog wheel light with exclamation. The car started to jerk, so I stopped to undo the battery terminals to reset the ecu. But the terminals back on and the ignition and lights on d dash came on with eml and smg cog but wouldn't start, turn d key and nothing.
Had the car towed home, disconnected both battery leads and tried again this morning. It started but when engaging reverse with foot on the brake it jerked and I tried driving round the block, but again both lights on and wouldn't come out of first and jerked a lot.
Read about the Salmon relay, checking fluid in the reservoir, gear position sensor, actuator, and smg pump.
I only bought the car yesterday.
It hadn't been used much in the last year, only has 56,600 kms on it.
What shud I do. Can't take it back.
Another question is how often does the cam belt need to be changed.

Thank you guys.
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Old 06-04-2017, 10:46 AM   #2
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Join Date: Sep 2004
Location: San Jose, N. California
Posts: 140
My Ride: E46 M3
If you bought it from a dealer yesterday, take it back to them right away to have them deal with it and make it right.

-1999 BMW M3 Convertible 6SP(Sold)
-2002 BMW M3 Coupe SMG(Current DD)
-2002 BMW M3 Convertible 6SP(Totaled by Red Light runner....that Bastard)
-2004 BMW 325CI Coupe (Sold)
-2003 CBR 600RR (Sold)
-1995 Acura Integra Turbo (Sold)
-1989 BMW E30 (Totaled by sis)

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Old 06-04-2017, 04:53 PM   #3
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Join Date: Jun 2017
Location: Malta
Posts: 2
My Ride: M3 SMG Convertible
No I didn't buy it from a dealer, bought it from someone I know. For a good price.
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Old 06-05-2017, 05:44 PM   #4
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Join Date: May 2006
Location: Texas
Posts: 433
My Ride: M3, X5
Sounds like you didn't test drive it and this person ripped you off.

You can only diagnose the problem by using INPA or ISTA-D software with an OBD cable. Don't bother with using generic OBD-II readers.
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Old 06-05-2017, 11:52 PM   #5
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Join Date: Sep 2011
Location: Western Australia
Posts: 1,089
My Ride: M3 - SMG
Good luck with your new car.
With vehicles a simple rule is the less you pay and/or the less you know the MORE it costs to own. This applies to the M3 and it seems you've hit both points. Keep reading, get to know your car. At least you can minimise one of them.
With the SMG quite small problems can seem bad so don't despair. As everyone has said get the BMW diagnostics happening or you will always be depending on dealers or guessing blindly.
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