0491284 135050 Gauge Mechanical tool
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.
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For adjusting the injection pump to the throttle valve idle position (synchronization) and for adjusting the full load stop (injection pump accelerator linkage)