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Technical Topics Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin 330i spark plugs

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      09-24-2024, 02:39 AM   #1
Sorin.mih
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330i spark plugs

Hello everyone! Currently on 69000 km (43000 miles) and the car has a very slight tremor when idling, so I suspect the spark plugs might need to be replaced. What are your recommendations? Currently I am oscillating inbetween OEM or NGK, which one do you recommend? I'd like to mention that the spark plugs have been changed in the past according to the car's dealership history at 32000 km (20000 miles).
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      09-24-2024, 08:07 AM   #2
UnluckySaxon
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I've always gone with NGK iridium plugs for my motorbikes and will be putting them in the BM. Dunno if this is good advice but one plug to the next isn't going to wildly under or over perform the other
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      10-05-2024, 04:08 PM   #3
cr cook
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Replaced mine last week, 6th oil change, about 55K miles. Although showing some wear, they did not appear to be 'worn out'. I cannot see why dealer changed at 20K unless there was some other issue. Were other repairs done at the same time?

Car seemed to be run a bit smoothers, not sure if real of perceived.

Not hard to do yourself, get a THIN 14MM sparkplug socket and 8MM Torx driver socket. Both for under $15 on Amazon. Good YouTube video on how to change.

I ordered plugs on Amazon from BMW dealer. They were NGK labeled.
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