How often should diesel glow plugs be changed?

Hey there! That's a great question about diesel glow plugs. From what I've found, there's no strict mileage-based replacement schedule like with spark plugs in gasoline engines. Glow plugs typically last between 60,000 to 100,000 miles, but they're more of a "replace when needed" component rather than a regular maintenance item.

You'll know it's time to change them when you notice symptoms like:

• Hard starting, especially in cold weather

• Rough idling after startup

• White smoke from the exhaust

• Check engine light with glow plug-related codes

It's usually recommended to replace all glow plugs at the same time, even if only one is failing, since the others are likely nearing the end of their life too. If you're experiencing any of these issues, it might be time to have them checked out!