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Ballast Resistor

Critical For Operation

Ignition System

Regulates the electrical current to the ignition coil to prevent overheating.

The ballast resistor limits the amount of electrical current flowing to the ignition coil, preventing it from overheating and ensuring proper ignition system function.

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Typical part cost
$10–$50🔒
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Typical labor cost
$50–$150🔒
🛣️
Typically lasts
80,000–150,000 mi
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Or about
5.0–10.0 years
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DIY difficulty
4/10

⚠️ Owners Often Notice

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

Engine misfires
Hard starting
Rough idling
Engine stalling
No spark
Poor performance

Related Services

Services commonly performed on or around this part.

Replace Ballast Resistor(s)

No standard interval on file

Inspect Ballast Resistor(s)

No standard interval on file

Test Ballast Resistor(s)

No standard interval on file