bmw 320i?

my car is losing power and juddering.after being placed on a scanner which showed up (lambda sensor,cat,and air flow meter)i have changed lambda sensor,air flow meter and plugs still the same please help.oh the cat has been tested it says it is ok
steve, October 2012


done
my bmw 320i se saloon yellow oil warning light comes on after 1 mile so I stop the car then restart and the warning light has disappeared. its a 2001 on a Y plate. THIS happens every time I have left the car for a few hours. Thanks

brian, May 2013
link Click here to see other fixes for BMW 320i.