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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > oem or bosch



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      06-29-2014, 11:54 PM   #1
mrgreenwood
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oem or bosch

i will be changing spark plugs and ignition coils don't know which one its the best
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      06-30-2014, 12:01 AM   #2
edeag3
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I just did mine today with the Bosch 332's, when I took out the plugs 3 were OEM Bosch (from when the car was new in '08) and 3 were OEM NGK (from a valve cover gasket dealer repair when they replaced 3 plugs and coils). I'm sure both will be fine, but the Bosch were like 8 dollars on Amazon and they seem fine.
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      06-30-2014, 05:06 AM   #3
Phil325i
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NGK FTW!
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      06-30-2014, 10:35 AM   #4
floydarogers
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Quote:
Originally Posted by mrgreenwood View Post
i will be changing spark plugs and ignition coils don't know which one its the best
Why are you changing the coils? If you're not getting miss-fire codes there is no reason to change them; waste of money.
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      06-30-2014, 03:21 PM   #5
mrgreenwood
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Quote:
Originally Posted by floydarogers
Quote:
Originally Posted by mrgreenwood View Post
i will be changing spark plugs and ignition coils don't know which one its the best
Why are you changing the coils? If you're not getting miss-fire codes there is no reason to change them; waste of money.
Routine maintenance that's all
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      06-30-2014, 09:02 PM   #6
edeag3
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Coils

For the coils, it's best to pull one out and see what the OEM was. Online sources kept telling me to buy 55 dollar BMW brand ones but it turns out a 32 dollar BOSCH was the OEM part even though Amazon and other told me it wouldn't fit.
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      06-30-2014, 09:23 PM   #7
4doorbmwpower
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NGK wont have nearly as many misfires if your tuned. they are a step cooler. but they do require you to gap them (.22) they are considered the modded 335i's sparks
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      06-30-2014, 09:29 PM   #8
Delta0311
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BMW oem coils are made by Bosch.
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      06-30-2014, 09:34 PM   #9
Saintor
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Right or wrong, I go with NGK rather than Bosch/OEM whenever I have the chance.
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