First spark plug replacement

mark_933 · 01-12-2026, 03:10 PM

Hello,
My BMW has done 125k km (around 80k miles). Do I need to change the spark plugs? I have no interruptions or any problems with the car.

Billfitz · 01-12-2026, 04:53 PM

Plugs are rated to last between 80k and 100k miles, so it's not too soon. It's recommended to replace the coils too, especially as you have to pull them to replace the plugs.

sams08 · 02-04-2026, 09:33 PM

I'd replace the spark plugs every 50-60k miles, depending on the car and how hard you drive it.

learntocode · 02-05-2026, 08:22 PM

Quote:

Originally Posted by mark_933

Hello,
My BMW has done 125k km (around 80k miles). Do I need to change the spark plugs? I have no interruptions or any problems with the car.

Yes, watch this YouTube DIY video here:

Solidjake · 02-06-2026, 06:35 AM

Quote:

Originally Posted by Billfitz

It's recommended to replace the coils too

Is there a reason why at that mileage? Just curious as I have still have my stock ones in.

BashShah · 02-15-2026, 10:38 AM

Quote:

Originally Posted by Solidjake

Is there a reason why at that mileage? Just curious as I have still have my stock ones in.

something to do.....lol

Jvac · 02-16-2026, 01:20 PM

Quote:

Originally Posted by Solidjake

Is there a reason why at that mileage? Just curious as I have still have my stock ones in.

It's been said that aging ignition coils can lead to misfires and that's why they should be replaced. Said by whom, is the question. The guy who is selling auto parts is the most likely answer.
The logical time to do it is when they are being removed to get to the spark plugs, they say. I didn't bother to change mine though. I don't believe they are as prone to failure as some folks would lead you to believe. Unless your car has oil leaks or electrical shorts, what's damaging the coils? They're not getting clogged with burnt fuel like the plugs...

F32Fleet · 03-01-2026, 03:25 PM

Quote:

Originally Posted by mark_933

Hello,
My BMW has done 125k km (around 80k miles). Do I need to change the spark plugs? I have no interruptions or any problems with the car.

For the N55 BMW recommends plugs every 60k miles and coils every 100k miles.

johnung · 03-01-2026, 04:35 PM

Install Eldor coils along with the plugs

01-12-2026, 03:10 PM	#1
mark_933 New Member 0 Rep 22 Posts Drives: BMW F30 330i xDrive LCI Join Date: Nov 2025 Location: Sofia iTrader: (0)	First spark plug replacement Hello, My BMW has done 125k km (around 80k miles). Do I need to change the spark plugs? I have no interruptions or any problems with the car.
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01-12-2026, 04:53 PM	#2
Billfitz General 9819 Rep 18,345 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	Plugs are rated to last between 80k and 100k miles, so it's not too soon. It's recommended to replace the coils too, especially as you have to pull them to replace the plugs.
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02-04-2026, 09:33 PM	#3
sams08 Registered 0 Rep 2 Posts Drives: 2019 BMW 430i Join Date: Nov 2025 Location: United States, TX iTrader: (0)	I'd replace the spark plugs every 50-60k miles, depending on the car and how hard you drive it.
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03-01-2026, 04:35 PM	#9
johnung Major General 5771 Rep 6,464 Posts Drives: 2015 BMW 335i x-Drive Auto Join Date: Oct 2017 Location: New Jersey/Philadelphia iTrader: (1) Garage List 2015 BMW 335i XDriv ... [8.67]	Install Eldor coils along with the plugs
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