SES light on engine shakes and sputters - 2006 BMW 5 Series

You need to have the fault codes read with a OBD2 code reader or scanner, that is how you find out what system in the computer controlled engine is acting up.

Is your check engine light on? If it is yo can have it check to dee what code is stored. This should help lead you to the problem.

You have a check engine light so you know what to do now

Why would you use a car with those issues & not have a shop
at least get a start on some possible solutions

you have an engine miss, any time the check engine light starts flashing the engine is missing, should be an easy fix sounds like either a bad spark plug or a bad plug wire if you have the codes checked there should be a code telling you what cylinder is missing, but if i were you i would tune up the engine all new plugs and wires and filters......GOOD LUCK

Have an autoparts store check the code that the SES light is pulling up. Then we can narrow down the problem.

Water on any electrical part of the engine can cause problems. Even high humidity. The only parts you can easily check and dry out is the plug wires where they connect to the coils and any connections you can find where components are plugged into wiring a harness.

Check fuel pressure regulator.

on our 1997 it was a misfire and one of the ignition coils needed replaced.

spark plugs wires needs complete tune up also synthetic oil change not designed to run on regular oil then check bearings