In general, the spark plugs on an Acura ILX should be replaced at intervals based on plug type and driving conditions. For newer ILX models with iridium or platinum plugs, replacement is typically around 100,000 miles under normal driving. Copper plugs usually require earlier replacement, around 60,000 miles. Always check your owner's manual or with a dealer for your exact year and engine.
Beyond plug type, driving style, climate, and trip length can alter the schedule. The ILX has used different engines across model years, so the official maintenance plan for your vehicle is the most reliable reference.
Engine options and plug types
Current engines in the ILX line
The ILX has featured several engine configurations over its run. Modern engines tend to use longer-life iridium or platinum plugs, while earlier setups used copper plugs that wear more quickly. The exact plug material and replacement interval depend on the model year and market, so confirming the correct specification for your car is essential.
The best way to know your specific replacement interval is to consult the official maintenance schedule in your owner's manual or ask a Acura dealer for the exact guidance for your year and engine code.
Recommended service intervals by plug type
Before listing typical mileages, note that Acura’s maintenance schedule can vary by year and market. The following intervals reflect common practices for ILX models equipped with the respective plug types.
- Iridium or platinum spark plugs: roughly 100,000 miles (160,000 km) under normal driving; expect earlier replacement if you regularly drive in extreme heat or cold, or do lots of short trips or towing.
- Copper spark plugs: commonly 30,000–60,000 miles, depending on manufacturer recommendations and driving conditions; older ILX configurations may fall in this range.
In practice, follow the official schedule for your car and consider a diagnostic check if you notice misfires or reduced performance before reaching these thresholds.
Driving conditions that affect spark plug life
Certain conditions can shorten plug life, even with long-life iridium/platinum plugs. Consider these when planning replacements.
- Frequent short trips that don’t bring the engine to full operating temperature
- Severe climates or heavy traffic that increases engine heat or fuel richness
- Towing or carrying heavy loads, which adds stress to the engine
- Oil leaks or ignition coil issues that contaminate or misfire through plugs
If you operate under severe conditions, you may want to schedule plugs closer to the lower end of the interval and have the ignition system inspected during service.
Signs that your spark plugs may need replacement
Look for these common indicators of worn plugs. If you notice one or more, have your ILX inspected by a qualified mechanic.
- Engine misfires, rough idling, or sudden loss of power
- Hard starting or rough accelerations
- Decreased fuel economy or reduced overall performance
- Worn or oil-contaminated ignition coils/wires; check engine light may illuminate
Addressing symptoms early can prevent further ignition system damage and help maintain performance and efficiency.
Maintenance tips for a smooth plug change
Helpful guidance for planning a spark plug replacement, whether you DIY or hire a shop.
- Use the plug type and torque specs recommended by Acura for your exact year and engine
- Consider replacing coils if diagnostics indicate coil wear or misfires linked to ignition components
- Inspect spark plug boots/wires for wear or cracks and replace as needed to ensure a proper seal
Sticking to the manufacturer’s guidance and using OEM or equivalent-quality plugs helps ensure reliable starts and optimal engine performance.
Summary
For an Acura ILX, the replacement interval depends on plug material and engine. Expect about 100,000 miles for iridium/platinum plugs and roughly 30,000–60,000 miles for copper plugs, with variations based on driving conditions and model year. Always verify the exact schedule in your manual and consult a dealer or trusted mechanic to confirm the appropriate interval for your car.
Bottom line: check your year-specific maintenance schedule, consider your driving habits, and plan replacements accordingly to keep your ILX running smoothly.