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Transmission is going bad, very common for bmw automatic transmission after 80,000 miles. A repair shop can fix the issue but I recommend new. This is the one issue that stopped me from getting one and getting the 300srt instead.
worn syncros, probably from someone down shifting into first at a high speed like its a race car. also could be the shifter cables have stretched and need to be adjusted.
The Bosch starter costs about $175, or $275 from the BMW
dealer. This is generally not an easy job on the 3 series engine. You should estimate at least $400 in labor, maybe higher at the dealership.
The convertible top is controlled by the Convertible Top Module (CVM II). This module contains the processing, controlling and monitoring electronics for the complete top operation. The CVM II communicates with the General Module over the K-BUS for operation of the top storage cover and windows. The CVM II is fully diagnosable and contains fault memory for storage of monitored faults. Diagnosis is carried out over the K-BUS with the DIS or the MoDIC. To put all of that "technical jargon" into plain English, If your convertible top is malfunctioning, you must BEGIN diagnosis by scanning your onboard computer network with the proper equipment.
he first thing is a compression test to check for gasket or cracks ( any qualified mechanic will know that)
next is to check if the scan tool in use has the right protocol for bmw electronics
there are plenty of manual checks that can be done without resorting to a scan tool
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