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Hi folks, I own an 04 645ci (around 102k km) and am having some issues. First off I have got it booked in next week at my BMW specialist, however, it's symptoms have gotten worse and was wondering if anyone has any ideas. Catalytic Converters I'm getting a warning message saying that my there's an engine fault and that "high loads can cause damage to catalytic converters". It is accompanied by the yellow engine warning light - this has not shut off since happening around 12 pm today. On cold mornings when I'd start my car, I would get this message, but would soon disappear and have no warning light. I have recently changed the air filter to a K&N as the last filter was quite dirty. Rough Idling and Vibrating For the last week or so, it had been rough idling in the morning on a cold engine start. And the revs were going up and down and a few mornings would just stop completely, right after turning it on. Since today's messages and warning light the car has been roughly idling and vibrating heavy when I take my foot of the brake, and feels like it's grinding almost when I'm accelerating. I can every feel it vibrating quite bad behind the pedals and foot rest. Also, my fuel consumption seems really high as it says 16.4L per 100km and feels like it's chewing through the gas (95) Could the Catalytic Converters be on their way out? I haven't checked spark plugs, but I know they are due for replacement. Any advice would be much appreciated as I am concerned about driving the car in this state.
