New owner of an e53 4.8is with issues :)

[Peezen]

I ran some active tests today with the vehicle off:

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All of the modules look to be in good shape, no water nearby. All 4 transmission plugs were bathed in oil so I cleaned them all off. The rear ground strap look perfect, and the front one looks fine after I wiped all of the oil off of it.

I will have to do some live tests of the transmission while driving next.

[Peezen]

Quick update. Replaced the wheel speed sensor and all lights went off. The 4x4 light cam e back, but is now the only light on.

Will report back after some further work. I finally got DIS v57 to work once, but when I tried to get it going a second time the diaghead emulator wouldn’t start.

Labour of love

[andrewwynn]

4x4 light usually means the TC is disabled. Did you say you had oil wear code? Getting DSC light off is a big win.

[Peezen]

I do have the oil wear light on. I am having such a hard time using DIS V57 as the diaghead emulator program keeps failing.

Driving me nuts as I need it to run to clear thy code and calibrate the TC actuator.

[andrewwynn]

I use foxwell scanner hate the computer based kludge

[Peezen]

I have the Schwaben/foxwell scanner as well, but for some reason the calibration doesn’t finish, and it can’t reset the oil wear light either.

[Overboost]

My guess is the steering angle sensor has failed causing the 4x4 light indicator. Common issue with higher mileage X5s. Easy to replace, takes about 1 hour.

[andrewwynn]

Check the LEW module.

If you have SAS error you may be able to clear and calibrate. You will want to repair/replace soonish though you can only get away with clear and calibrate a few times.

[Peezen]

Ok some good news. I replaced the front left wheel sensor and the ABS and brake lights went off. The 4x4 was still in and there were some steering angle codes.

I reset the steering angle codes and the 4x4 light went off as well. The suspension inactive message is gone as well once I cleared the code 50 CAN Bus code, and it didn’t come back this time either.

All lights and errors are gone from the dash, though I do need to replace the front left air bag.

The last thing is the transmission. I reset all of the adaptive codes and have driven around a bit. It still seems to hunt into first a bunch, sometimes I can rev very high. It does seem to be catching now, and I can drive normally, especially if I accelerate gently. Seems like slipping sporadically. The manual shifting seems to work as well.

No dash lights or codes at all at this point. I have the foxwell scanner, what live testing am
I supposed to be looking at here? The general status text comes back with every thing ok.

[Peezen]

I’m going to put a bow on this thread and deal with shifting woes elsewhere. Thank you for the input in this thread, in the end I replaced a wheel speed sensor and reset a bunch of codes and everything cleared and nothing has come back.