Spark plug OEM BMW or OEM Subaru

Just traded in my 2015 Forester with 219,000 miles and the original spark plugs.

I had similar problems with mine until I tried stock F80 M3 plugs. Mfg #12120039634KT1. Mine was 07 N54 FBO.

Guy was gunna charge me $720 USD for changing my serp belt and another $550 USD for changing just my spark plugs. That's $20 for the serpantine/drive belt, $150 for the belt tensioner and I think another like $120ish for spark plugs (B58 engine). So in total I saved myself roughly $1,000 just doing it myself.

Normally that's a result of a failed spark plug seal. If you have no other problems I would put new spark plugs in it and check them at the next oil change.

Since then I have take good care of it, replaced the brakes on schedule in August 2020 and then in August 2021 new spark plugs.

My 2002 had a similar issue. In my case it was the spark plugs, $250 fix.

I did track it extensively, probably 3-4,000 km of track use. The only thing it needs is brake fluid and better pads and you're good to go. My car was flawless for the entire time I had it. It threw a CEL right before I sold it that was solved with a simple spark plug change. It never overheated at the track and it was a lot of fun there and very refined and comfortable for highway travel.

We just got the 60k service done (spark plugs) and it still does it.

BMW 116i. Over the course of a year,

New spark plugs

New ignition coil

New rocker cover

New water pump

New air filter

New cabin filter

New oil filter

New oil

New water pump tensioner and pulley

ECU flash

New battery

New wheel speed sensor

a spark plug job on an STI can be a 6+ hour job :thumbdown: