Yes. The Chevy HHR’s gasoline engines use spark plugs—the ignition system relies on them, with one spark plug per cylinder.
The HHR was built from 2006 through 2011 and offered two inline-four Ecotec engines: a 2.2-liter and a 2.4-liter. Both engines have four cylinders, which means four spark plugs and corresponding ignition coils are used. Spark plugs are a standard maintenance item; replacement intervals depend on plug type (platinum or iridium) and driving conditions. Always refer to the owner's manual for the exact service interval and torque specifications.
Engine options and spark plug configuration
The HHR's two gasoline engines are four-cylinder designs. In both cases, four spark plugs are installed—one per cylinder—to ignite the air-fuel mixture.
Two engines at a glance:
- 2.2-liter Ecotec inline-4 (L61) — four spark plugs; typically using coil-on-plug ignition.
- 2.4-liter Ecotec inline-4 (LE5) — four spark plugs; typically using coil-on-plug ignition.
In short, regardless of the engine choice, the HHR uses four spark plugs and four ignition coils. Replacing all four plugs at the same time helps maintain balanced ignition and performance.
Spark plug maintenance considerations
Maintenance guidelines cover replacement intervals, plug type, and installation practices. Here are the key points to know.
- Follow the spark plug type and gap specification printed on the maintenance sticker or in the owner's manual.
- Replace all four plugs at the same time to prevent misfires and uneven performance.
- Check ignition coils, wires, and boot connectors for wear when performing plug service.
- Use the recommended torque spec and, if applicable, apply anti-seize or thread lubricant as directed.
Adhering to these guidelines supports smooth starts, better fuel economy, and consistent engine performance across the life of the vehicle.
Additional notes
Some model years may have updates to ignition coil technology or service bulletins. If in doubt, confirm the exact replacement interval and plug type for your vehicle with a Chevrolet dealer or a qualified mechanic, using the specific year and engine code.
Summary
Yes. The Chevy HHR uses spark plugs in all its gasoline engine configurations; both the 2.2L and 2.4L four-cylinder engines require four spark plugs. Replacement intervals for modern platinum or iridium plugs are commonly around 100,000 miles, but always follow the official maintenance schedule for your vehicle.