21st May 2024, 22:28

I've had the odd one injector replaced in over 25 years of driving cars with fuel injection. While they can fail like, say, an alternator (I've never had one failure - and I drive "unreliable" European cars), I wouldn't go so far as to say they are a service item. There is no recommended replacement interval, and especially with direct injection engines now that use high-pressure injectors, you wouldn't want to know how much each of them cost to replace.