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Glow Plug

Critical For Operation

Engine

Heats air in the combustion chamber for easier diesel engine starting.

The glow plug preheats the air in a diesel engine’s combustion chamber, allowing for better fuel combustion and easier starting, especially in cold weather.

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Typical part cost
$20–$60🔒
🔧
Typical labor cost
$100–$200🔒
🛣️
Typically lasts
80,000–150,000 mi
📅
Or about
7.0–10.0 years
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DIY difficulty
4/10

⚠️ Owners Often Notice

If the Glow Plug is starting to fail, these are the signs owners most commonly report before it gets worse:

Hard starting
Rough idling
White smoke from exhaust
Engine misfires
Glow plug light on

Related Services

Services commonly performed on or around this part.

Replace Glow Plug(s)

No standard interval on file

Inspect Glow Plug(s)

No standard interval on file

Test Glow Plug(s)

No standard interval on file