X5 E70 40d glow plug controller.
Discussion
Hello, I think I have the exact same car (E70 40d). Last winter, it was a little difficult to start on a cold day and then would run rough for the first 30 seconds or so. I assume there's a problem with either the glow-plug controller or glow plugs themselves although I've never seen a check engine light. Through the summer, the car has been perfect so I haven't done anything about it.
I too read online about having to remove the intake manifold to change the controller and also horror stories of the glow plugs snapping when removed with the tips either stuck in the head or falling into a cylinder. I'd be very grateful if you would update this thread with your experience once you've done the work.
As an aside, just in case you're unaware, I'll mention the recall on the front drive-shaft / prop-shaft. This is a weak point and if it fails, it can destroy the engine and gearbox. There is / was a recall and mine was replaced by BMW, with a redesigned part, late last year.
I too read online about having to remove the intake manifold to change the controller and also horror stories of the glow plugs snapping when removed with the tips either stuck in the head or falling into a cylinder. I'd be very grateful if you would update this thread with your experience once you've done the work.
As an aside, just in case you're unaware, I'll mention the recall on the front drive-shaft / prop-shaft. This is a weak point and if it fails, it can destroy the engine and gearbox. There is / was a recall and mine was replaced by BMW, with a redesigned part, late last year.
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