Ignition Coils: At What Mileage to Replace?

[webster]

Alright so my next major service is the Vanos/VCG/Plugs for my ZHP. i have only to order the Dr Vanos unit to complete all tools/parts associated. however, i'm wondering at ~60k miles if ignition coil replacement is also necessary. i realize that the work involved is redundant so the labor to replace is not my concern, only the cost for the parts.

so what mileage should/have you guys replace(d) your coils?

also, i've been looking at OEM v Bav Auto "High Performance" Ignition Coils which they claim increase performance/hp. anyone used these and seen any difference? i'm highly skeptical what if any performance gains can come from coils.

[danewilson77]

Imo, those are an "only as needed" item in my book. I may buy some performance coils at 200k miles.

Sent from Williamsburg, VA USA

[Hermes]

performance coils and all that upgraded stuff is not necessary unless you're running FI

[danewilson77]

performance coils and all that upgraded stuff is not necessary unless you're running FI

Nor are BBS rims.... ;o)

Sent from Williamsburg, VA USA

[Hermes]

you know what I meant...

basically all the ignition upgrades are not necessary on a relatively stock engine, Justin will be able to explain better when he sees this thread

[danewilson77]

you know what I meant...

basically all the ignition upgrades are not necessary on a relatively stock engine, Justin will be able to explain better when he sees this thread

Yup. Agree. Would having them be a step in the wrong direction? I mean...is there a negative other than $$$.

Sent from Williamsburg, VA USA

[Hermes]

no, just $$$

[M0nk3y]

If you replace make sure they are Bosch OEM.

I keep one in my trunk. I blew a coil at 27k miles. Replace as needed. You'll know when it goes out

Sent from my DROID X2 using Tapatalk 2

[webster]

so this is one of those rare BMW engine parts that truly is "wait until it breaks before replacing"? good to know.

[danewilson77]

so this is one of those rare BMW engine parts that truly is "wait until it breaks before replacing"? good to know.

Heh....nice. kinda like a fender.

Sent from Williamsburg, VA USA