New Fuel Injector, same type need coding?

[My135]

If I replace one of my fuel injector with the same kind (part # 13537585261) currently on my car, do I need BMW's help to re-code?

Also, I found out that the newest fuel injector part # is [FONT='Calibri','sans-serif']13538616079, but dealers still selling the older one.[/FONT]
[FONT='Calibri','sans-serif'][/FONT]
[FONT='Calibri','sans-serif']Please help and thanks in advance.[/FONT]

[Dackelone]

Its my understanding that yes, you will need to code it to work properly.

[Buzz135]

I replaced an injector and after a few months I took it to an ind shop for some other work and asked them to code the injector but they did not know how to do it. I have had the car to 2 track days and drive the car daily. No problems and no difference in how the car performs that I can feel.

[neglectedX5]

You need INPA! It was free for me, i downloaded it from some thread, and bought a cable from ebay for like $40. It can do so much and code injectors is just one. They need to be coded so the ECU knows the flow rate at what voltage of the injector. If you are lucky, you could switch it out with an injector with a similar specs (-0.1 or +0.1) and you may not need to code them. They contain a special piezo-electric element inside that controls the fueling and each injector has slightly different operating parameters hence the need to code.

[My135]

What happened if I replaced it with the same kind (i.e. same part#) and not re-code, will it throw an error code (i.e. SES light on) or just one cylinder operating at a sub-optimum conidtion (which I can live with)? Any one know for sure. I guess I will try to find out. Thanks.

[Freon]

That one cylinder could run leaner or richer. Even just 3% off would be about half a point of AFR, and you only get one oxygen sensor for 3 cylinders.

For example, if your new injector flowed less the ECU will add fuel to all three cylinders on that oxygen sensor, but that one will still be fairly lean and the other two slightly rich. You could get detonation in that one cylinder, or a lot of ignition correction. If it is bad enough it may trigger a CEL, cause misfires, etc.

I would not just "live with" that.

[Haveyouseenjay]

Originally Posted by Buzz135

I replaced an injector and after a few months I took it to an ind shop for some other work and asked them to code the injector but they did not know how to do it. I have had the car to 2 track days and drive the car daily. No problems and no difference in how the car performs that I can feel.

what car/ motor did you replaced them in?

[Haveyouseenjay]

Originally Posted by neglectedX5

You need INPA! It was free for me, i downloaded it from some thread, and bought a cable from ebay for like $40. It can do so much and code injectors is just one. They need to be coded so the ECU knows the flow rate at what voltage of the injector. If you are lucky, you could switch it out with an injector with a similar specs (-0.1 or +0.1) and you may not need to code them. They contain a special piezo-electric element inside that controls the fueling and each injector has slightly different operating parameters hence the need to code.

any chance you still have that link you ??