About every 50,000 miles.
According to the owners manual, they have platinum plugs that should be changed at 100,000 miles.
Heater plugs in a ford focus 1.8 engine should be changed every 18 months-2 years.
30000 miles
thank you
about every 75000 miles
Once on 1-2 year on regular spark plugs. Once every there years on High end spark plugs.
A standard spark plug should last about 50K. A platinum tip plug should last 100K.
100K
I just spoke with a Parts person at a local Toyota dealer. He told me that the 2004 Toyota Matrix requires Iridium spark plugs, which retails for about $12 at the dealership, and it should not need to be changed until 120,000 miles.
100K if they are platinum plugs, 50K if they are regular plugs.
No.
Clogged fuel filter, dirty injectors, bad spark plugs (should be changed every 100K miles).