[ads_ali]

Hi all

So my 2020 m340i has covered 52k and is still on the original spark plugs. It's had 3 engine oil services and was wondering when are the spark plugs due for change? The last engine oil service was this year in march at 47k. Location UK

[Bc2005]

On my previous BMW 328i the spark plug change interval was recommended at 60k miles. I’m not sure about the M340i, but I assume it’s similar.

I do remember having to buy a slim spark plug socket, since there was very little clearance around the plugs and my generic socket wouldn’t quite fit.

[peelerec]

Originally Posted by ads_ali

Hi all

So my 2020 m340i has covered 52k and is still on the original spark plugs. It's had 3 engine oil services and was wondering when are the spark plugs due for change? The last engine oil service was this year in march at 47k. Location UK

Do not wait for the recommended service interval. I would recommend changing plugs based on your driving style and how hard you push the vehicle. If you truly drive it lightly and as if it was a standard economy vehicle, then changing every 40k miles is suitable. However, if you’re an enthusiasts who drives the car aggressively every so often or goes to a road course, it’s safer and mitigates risk to change more frequently, ie 20-30k miles.