2013 Bmw X5M E70

[Arshad Osman]

Good Day,

I would like to know about an issue that’s now become persistent on my X5M E70 has around 110000km.

The issue is a continuous misfire on cylinder no 6, the following was done,

1) Changed the coil pack
2) Changed the plug
3) Changed the injector on cylinder 6 and was coded to the car.

Yet it’s still misfiring, I’m leaning towards maybe a faulty O2 sensor but I’m not sure,

Your assistance in this matter will be highly appreciated.

Regards.

[Dave00]

Have you checked your injector on that cylinder? When changing your oil is it more saturated with gas as you could have a sticking injector that is causing a misfire. I would use a bore scope on that cylinder (pull the coil and plug) and visually inspect the cylinder to see if the injector is leaking down under pressure.

[Arshad Osman]

Thank you, that’s plan B just waiting for some parts from bmw.