The diagnostic socket is located on the driver's side in the footwell below the dashboard.
Exhaust gas recirculation (EGR)
Yes
expand_moreIdling speed with automatic gearbox
740 i with gasoline straight-6 3.0 L 322 HP engine (2008.10–2015.12)
600–860 rpm600–860 rpm600–860 rpm
750 i with gasoline V8 4.4 L 402 HP engine (2008.10–2015.12)
600–860 rpm600–860 rpm600–860 rpm
All other modifications
600–800 rpm600–800 rpm600–800 rpm
Minimum engine oil temperature at VET
140°F140°F60°C
expand_morePetrol exhaust gas values
CO content at idling speed
0–0.2 %0–0.2 %0–0.2 %
CO content at increased idling speed
0–0.2 %0–0.2 %0–0.2 %
Increased idling speed
2300–2700 rpm2300–2700 rpm2300–2700 rpm
Lambda sensor design
wideband sensor
expand_moreLambda value
740 i with gasoline straight-6 3.0 L 322 HP engine (2008.10–2015.12)
0.91–1.05 λ0.91–1.05 λ0.91–1.05 λ
All other modifications
0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
Maximum HC content at idling
200 ppm200 ppm200 ppm
Petrol conditioning speed
3000–4000 rpm3000–4000 rpm3000–4000 rpm
Petrol conditioning time
180 s180 s180 s
expand_moreTest speed for lambda sensor signal
All other modifications
600–860 rpm600–860 rpm600–860 rpm
To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by BMW.
Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2008 BMW 7 Series user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.
Before doing any DIY service please check your insurance policy and BMW warranty policy for your region. In some regions DIY service may invalidate your warranty.
DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow BMW 7 Series service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.
Doing basic service for your 2008 BMW 7 Series you're not only saving money, but also also improving your technical skills and learning something new.
2008 BMW 7 Series generations
In 2008 BMW offered 2 generations of the 7 Series. Emission may vary in different generations. Be sure that you are looking at the rigt modification.