Why would 4 spark plugs go bad at the same time?
engine light came on car started shaking and chugging. Dealer is trying to tell
me its 4 bad spark plugs. Seems to me there has to be a root cause of them
going bad all at once.
Without having the codes, we can't be sure, but if you have a misfire on one cylinder and the plug is bad, you usually replace all of them as they too are probably worn. At $3-$5 a piece, no big deal.
Could also be bad fuel that caused the problem to begin with and then it all just went down hill from there.
How many miles on your Mini?
Looking for a Used Cooper in your area?
CarGurus has 11,023 nationwide Cooper listings starting at $2,000.
Search MINI Cooper Questions
MINI Cooper Experts