UPDATE #2

After replacing both CPS, i got the SES light popping up again. its getting annoying, this time the code said P0141 (bank 1 sensor 2; heater circuit malfunction).

does anyone really know if O2 sensors go bad this early at 55K on the odometer? how much do O2 sensors go for?

im afraid im chasing a ghost with these codes.

ill keep you guys updated with what i do.

takecare,
mustafa

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2001 BMW X5 3.0i Blk/Beige