Lastly, at regular service intervals, it is worth checking the gear position sensor, Mode position sensor and if a Mode not selectable.
Bmw e46 automatic transmission problems manual#
Always consult your user manual or local dealer for the recommended oil types. The oil used in the hydraulic system is CHF11s Pentosin oil. Oil levels within the system should also be regularly topped up. If you’re BMW E46 M3 SMG shows any dashboard warning lights, take the car immediately to a local dealer or a qualified mechanic. However, depending on the fix, parts and labour can become expensive. While a more common problem is hydraulic pump failure.Īll the above problems can be easily rectified. In the most favourable cases, only a replacement relay was needed. It is usually associated components that tend to fail. The sensor strip wiring located on the hydraulic block can also degrade over time.Īs a matter of course, if the clutch needs replacing, the flywheel is usually replaced at the same time.Īlthough the above problems may seem numerous, the SMG gearbox itself is generally very efficient. These include: the clutch slave cylinder, clutch position sensor, SMG accumulator, guide tube and release bearings.
There have also been other associated problems documented with the M3 SMG. Common BMW M3 E46 SMG Gearbox ProblemsĬommon 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. The M3 SMG uses the same manual gearbox as in other BMW vehicles but instead uses an electric-hydraulic pump and computer control to operate the clutch. What Is A BMW M3 SMG Transmission? Image Credit: Unsplashįirstly, the SMG transmission stands for ‘Sequential Manual Gearbox.’ The gearbox essentially allows the user to shift gears like a manual, with the convenience of an automatic with no clutch.
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