The owners manual says every 75,000 miles
Every year, or as an when the service requires
Replace them every 100,000 miles.
need to replace all my spark plugs on my Mazda mpv 2003 please help me.
check your coils for spark.if there ok replace the plugs and wires
Your spark plug manufacturer would recommend your replacement schedule.
Depends on the type of spark plugs. Factory plugs around 70 - 100k depending on the condition of the plugs. I would replace the spark plugs out with some AC Delco iridium plugs they will last you 100k+.
The Mazda 5 does not have glow plugs. Maybe you meant spark plugs?
If you do not have any problems with plugs, change them when you replace the timing belt (do not forget to replace the spark plug wires too).
You should replace the spark plugs when your car won't start first time but does eventually.
6000 miles
Every 30,000 miles or 24 months, depending on how much you drive the car and on what conditions
A Mazda 6 s requires 6 plugs, A Mazda 6 i requires 4