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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 07-08-2012, 01:02 AM   #1
jjrichar
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Join Date: Sep 2009
Location: Australia
Posts: 221
My Ride: 330 Ci convertible
Project 5HP19 Transmission: Selector Switch

Selector switch

Link to other parts of the project
http://forum.e46fanatics.com/showthread.php?t=928248

On the side of the transmission is a large switch. This is what tells the car which gear has been selected. You may need to replace this if it fails, or if you are like me, you will want to pull it apart, find out what is wrong with it and fix it.

If it fails, you will get an OBD code saying that the switch is giving an invalid value, and the transmission will go into limp mode (stuck in 4th gear). Unfortunately I know this because my wifeís Audi (which has a 5HP19 transmission) had this issue. Fortunately for BMW owners, the switch is easily accessible from under the car. On the Audi itís a nightmare but thatís another story. I think Iíve mentioned before in other posts that the BMW is far easier to work on than the Audi, and a miles better car. Iíll mention it again. Our problem was fixed by having the engine off, but the ignition turned on, and then running the gear lever back and forth through all the gears over and over about a hundred times. The car hadnít been started for about 6 months (due to us living overseas) and I think some of the contacts maybe got some moisture in them and corroded a little. Who knows? It now works, and I didnít have to pay Audi $800 for a new switch, and about $1500 in labour to fix it. Did I also mention that Audi charge about twice as much for the same parts as BMW?

If you do have a problem with the switch, here are some photos that might help in pulling it apart and fixing it. Disconnect the gear select cable and then remove the switch. Unfortunately the switch is riveted together. Drill the rivet heads off, and then knock them out. To put it back together you can rivet it if you like, or do what I did. Get some small nuts/bolts and with a little loctite have it back like new. Donít worry about the heads of the bolts sticking out, there is plenty of room on each side of the switch for the other components that are around it.





























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Old 07-08-2012, 02:58 AM   #2
Arty
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Join Date: Oct 2009
Location: UK
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My Ride: 1999 328i
Cool post, thank you.
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Old 10-09-2012, 05:30 PM   #3
Lemonsqr
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Join Date: Sep 2003
Location: Chicago, IL
Posts: 3,138
My Ride: 2001 TiAg 330i
This has no relevance to my manual transmission.....nice writeup none the less
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