Readers ask: Bmw M3 Smg Problems?

Common BMW M3 E46 SMG problems include the following: a faulty relay, faulty hydraulic pump and/or solenoid, trouble going through the gears, SMG fault codes, actuator problem, cannot shift gears, a leaking SMG transmission, not engaging gears, and dropping out of neutral.

Is the BMW SMG transmission good?

There are no clear advantages to the SMG transmission. Everything it does, a traditional manual can do better, and only disconnects you from the driving experience – which is unfortunate, because the driving experience is kind of the whole point of owning one of these.

How long does SMG pump last?

How long does an SGM pump normally last? In this case, the original pump lasted a little over 12 years with about 64,000 miles on the odometer.

What does SMG mean on M3?

SMG stands for Sequential Manual Gearbox. It’s actually the same manual gearbox that is found in the cars with a clutch pedal, but instead of having the clutch foot operated, it has the clutch electro-hydaulically operated via a pump and wired to computers.

How do I reset my SMG transmission?

Drive to approx 30/40mph, stick her into neutral when the screen shows gear ‘0’ hold both paddles together for 3-5 secs. Stick her back in to gear and your SMG will be reset.

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Can SMG drive like automatic?

In fact, few who have driven one have had the opportunity to drive one properly. While the SMG does feature an automatic mode, using it is a disservice not only to you, the driver, but to the car itself. These cars love to be flogged, and they repay that abuse in spades.

How do you check SMG fluid levels?

Open the hood

  1. first, open your SMG reservoir.
  2. use a flat head screwdriver and hammer to lightly tap the cap to break the seal. (
  3. opening the cap first will allow you to close it hand tight so its easily ready to check after priming the system.

What is BMW SMG transmission?

SMG stands for Sequential Manual Gearbox. It’s essentially a transmission capable of functioning as an automatic, or functioning as a manual transmission. The innovation is that, when functioning as an automatic, the driver does not need to operate a clutch pedal, simply designate desired gear.

Does BMW SMG have clutch?

First, note that the SMG system is not an automatic transmission than can be shifted manually – like BMW’s Steptronic or Porsche’s Tiptronic – it is a manual transmission with a clutch, but without a clutch pedal, that can change gears by itself in response to driver input.

How does SMG transmission work?

The Sequential Manual Gearbox, or SMG is a manual transmission that acts like an automatic. When you want fine control over gear selection, you can work your way through the gears, and the transmission will automatically engage clutches to make the change in gears as you shift.

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Is SMG dual clutch?

BMW Shifts Gears: SMG out, new seven-speed, double clutch gearbox in. Key to the DCG’s operation are its two oil-cooled wet clutches, one for the even gears and one for the odd gears and reverse.

How do I change my SMG fluid?


  1. Undo the fill port on the SMG black plastic reservoir.
  2. Put in a small hose (I’m assuming that there is no mesh / filter there) and pump out all the fluid.
  3. Refill.
  4. Put the fill plug back in place

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