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Yes. Diesels run pretty cold compared to a gasoline engine. The glow plugs help warm the engine up until it reaches operating temp. Before it reaches operating temp diesel doesn't combust as efficiently as it should.
What's common on these engines is the thermostat(s) will fail open and cause the glow plugs to continuously be on trying to get the engine up to operating temp and eventually burn out.
Depending on your codes, and how long this has been an issue you might need to replace your thermostats, glow plugs, and glow plugs controller.
What are the codes? Not P codes, mind you. Actual BMW hex codes.
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