HUMMER H3 Alpha Spark plug replacement Cost
2007–2010 · Engine, Fuel & Emissions system
Typical range
$120–$450
Parts + labour
Labour hours
0.5–1.5h
At a typical garage
Spark plugs ignite the air–fuel mixture; worn plugs cause misfires, rough idle, poor fuel economy and difficulty starting. Most modern engines use iridium or platinum plugs with 60,000–100,000-mile intervals. HUMMER H3 Alpha spark plug replacement costs $120–$450.
Typical parts included
- Spark plug
- Spark plug
What affects the price
- Copper vs iridium vs platinum plugs (iridium lasts longest)
- Number of cylinders
- Accessibility—some engines require intake manifold removal, adding significant labour
Common questions
How long does this repair take?
Spark plug replacement on a HUMMER H3 Alpha typically takes 0.5–1.5 hours at a garage.
How often does this need to be done?
For a HUMMER H3 Alpha, this is typically needed every 30,000 miles for copper plugs; every 60,000–100,000 miles for iridium or platinum plugs.
Other engine, fuel & emissions system repairs on the HUMMER H3 Alpha
- ABS hydraulic unit replacement$459–$842
- ABS sensor replacement$189–$347
- ABS system bleeding$151–$277
- AC compressor clutch replacement$378–$693
- AC compressor replacement$405–$743
Spark plug replacement cost on similar cars
- HYUNDAI Santa Fe$90–$165
- HONDA CR-V$90–$165
- LEXUS RX$99–$182
- TOYOTA Highlander / Kluger$90–$165
- KIA Sorento$90–$165
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