M3 sparkplugs after 3 years?
 

Dropped off the F80 for its final free oil change and was told it was due for a break fluid flush, cabin air filter, and spark plugs.

The car is 3 years old with 10,552 miles.:?

It's all free, which is great, but the plug service surprised me.

Yeah - I would have expected the plugs to be more of a mileage thing than a time thing... or whatever happened here....

Oh well, free is free. :)

I always go by the manufacturer’s recommendation, what does the manual say ? I know in my 911 I had the spark plugs changed at probably around the close to that mileage but I think Porsche recommended it at the 5 year service …

Sometimes I look back and can’t believe the amount of maintenance I put into that car due to age rather then mileage.

Plugs are every four years on the 987, regardless of mileage. Looks like the S55 M3 interval is indeed every 3 years.

On the S65, BMW was using the spark plugs for knock detection. So spark plug condition is absolutely critical. Maybe the S55 is also doing that?

Nope. Looks like they went back to knock sensors on the S55. I wonder what the reasoning was?

Dealerships make most of their money from service?

I wouldn’t be surprised if the S55 eats plugs in other ways.

Run plugs too long in an S65, and it’ll cost you 30-40hp.

Wow, that’s crazy!