2003 BMW 3 Series Coupe emission

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Condition	Value

expand_moreDiesel exhaust gas values

expand_moreCut-off control speed


320 Cd with diesel straight-4 2.0 L 148 HP engine (2003.11–2006.7)	4700–4800 rpm4700–4800 rpm4700–4800 rpm

expand_moreMaximum K-value


320 Cd with diesel straight-4 2.0 L 148 HP engine (2003.11–2006.7)	2.5 1/m2.5 1/m2.5 1/m

expand_moreGeneral exhaust gas values


Diagnostic socket location	The diagnostic socket is located on the driver's side in the footwell below the dashboard.

expand_moreIdling speed with automatic gearbox


All BMW diesel straight-4 2.0 L M47 D20 (204D4) engines	600–800 rpm600–800 rpm600–800 rpm

expand_moreIdling speed with manual gearbox


316 Ci with gasoline straight-4 1.6 L 103 HP engine (2000.4–2006.7)	760–840 rpm760–840 rpm760–840 rpm
318 Ci with gasoline straight-4 2.0 L 141 HP at 6200 RPM, 200 N⋅m at 3600 RPM engine (2001.9–2006.7)	600–800 rpm600–800 rpm600–800 rpm
318 Ci with gasoline straight-4 2.0 L 141 HP engine (2001.9–2006.7)	600–800 rpm600–800 rpm600–800 rpm
320 Cd with diesel straight-4 2.0 L 148 HP engine (2003.11–2006.7)	770–870 rpm770–870 rpm770–870 rpm
330 xi with gasoline straight-6 3.0 L 228 HP engine (2000.6–2006.7)	650–750 rpm650–750 rpm650–750 rpm
All other modifications	700–800 rpm700–800 rpm700–800 rpm

expand_moreMinimum engine oil temperature at VET


320 Cd with diesel straight-4 2.0 L 148 HP engine (2003.11–2006.7)	158°F158°F70°C
All other modifications	176°F176°F80°C

expand_morePetrol exhaust gas values


CO content at idling speed	0.5 %0.5 %0.5 %

expand_moreCO content at increased idling speed


316 Ci with gasoline straight-4 1.6 L 103 HP engine (2000.4–2006.7)	0.3 %0.3 %0.3 %
318 Ci with gasoline straight-4 2.0 L 141 HP at 6200 RPM, 200 N⋅m at 3600 RPM engine (2001.9–2006.7)	0.3 %0.3 %0.3 %
318 Ci with gasoline straight-4 2.0 L 141 HP engine (2001.9–2006.7)	0.3 %0.3 %0.3 %
All other modifications	0.2 %0.2 %0.2 %


Current at test speed	−0.115–+0.077 A−0.115–+0.077 A−0.115–+0.077 A

expand_moreIgnition time


316 Ci with gasoline straight-4 1.6 L 103 HP engine (2000.4–2006.7)	-12°00' - before TDC + after TDC
No adjustment possible


Increased idling speed	2500–3000 rpm2500–3000 rpm2500–3000 rpm
Lambda sensor design	wideband sensor
Lambda value	0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
Maximum HC content at idling	100 ppm100 ppm100 ppm

expand_moreTest speed for lambda sensor signal


BMW gasoline straight-4 1.6 L M43 B16 (164E3) 103 HP	760–840 rpm760–840 rpm760–840 rpm
BMW gasoline straight-4 2.0 L N46 B20 A 141 HP	600–800 rpm600–800 rpm600–800 rpm
BMW gasoline straight-4 2.0 L N42 B20 A 141 HP at 6200 RPM, 200 N⋅m at 3600 RPM	600–800 rpm600–800 rpm600–800 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 2003 BMW 3 Series Coupe 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.

Conquer your fears and never give up!

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 3 Series Coupe 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 2003 BMW 3 Series Coupe you're not only saving money, but also also improving your technical skills and learning something new.

2003 BMW 3 Series Coupe generations

In 2003 BMW offered 2 generations of the 3 Series Coupe. Emission may vary in different generations. Be sure that you are looking at the rigt modification.

Second generation LCI

E46

2003 BMW 3 Series Coupe Second generation Emission

Table of Contents

Conquer your fears and never give up!

2003 BMW 3 Series Coupe generations

Second generation LCI

BMW 3 Series Coupe Second generation model years

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