How often do you change spark plugs on an Acura TL?
Typically, about every 105,000 miles (168,000 km) for Acura TL models equipped with long-life iridium or platinum spark plugs. Copper plugs and severe driving can require earlier changes. Always verify the exact interval in your owner's manual or with a dealer.
What affects the spark plug replacement interval
Several factors determine how often you should replace spark plugs on a TL, including the plug material, engine design, and your driving conditions.
Engine design and plug type
Modern Acura TL engines that use iridium or platinum plugs are designed for long life, with a typical replacement interval around 105,000 miles. Copper plugs, if installed, generally wear out sooner and may require replacements around 30,000–60,000 miles.
Driving conditions
Severe driving—such as frequent short trips, lots of city stop-and-go, towing, or extreme temperatures—can shorten plug life and push replacement closer to 60,000–90,000 miles depending on the setup.
In practice, most TL owners with factory long-life plugs will reach 105,000 miles without issue, but always confirm the exact interval for your specific year and engine in the owner’s manual or with a dealer.
Recommended intervals for Acura TL by plug type
Below is a general guide to replacement timing based on plug material and typical TL usage. Use this to plan service, but rely on the official schedule for your exact model year.
- Iridium or platinum spark plugs: about 105,000 miles (168,000 km).
- Copper spark plugs: typically 30,000–60,000 miles, depending on performance and conditions.
- Severe driving conditions: may necessitate earlier changes, roughly 60,000–90,000 miles depending on use and responsiveness.
For most modern TLs, the 105,000-mile figure is a reasonable target if factory long-life plugs are installed. Always check your owner's manual for the exact specification for your year and engine variant.
Signs that your spark plugs may need replacement
Look for these indications that it may be time to inspect or replace the spark plugs in your Acura TL.
- Rough idle or engine misfires
- Reduced acceleration or power delivery
- Lower fuel economy or increased fuel consumption
- Engine hesitation, stumbling, or difficulty starting
- Check Engine Light or misfire codes
If you notice one or more of these symptoms, have the plugs inspected and replaced if needed to maintain performance and efficiency.
Maintenance tips for spark plug replacement
Keep these practical tips in mind when planning a spark plug change on a TL.
- Use OEM-recommended plugs or equivalent high-quality iridium/platinum plugs designed for your engine.
- Follow the manufacturer’s torque and gap specifications during installation.
- Inspect and replace ignition coil boots if they show signs of wear or damage.
- Replace all spark plugs at the same time to ensure even performance across all cylinders.
- Apply dielectric grease to spark plug boots to ease future removal and improve sealing.
Adhering to these steps helps ensure reliable starting, smooth idling, and consistent power after replacement.
Summary
For most Acura TL models with modern long-life plugs, plan a spark plug change around 105,000 miles. If your TL uses copper plugs or you regularly drive under severe conditions, expect the interval to be shorter. Always consult your owner's manual or a dealer for the exact specification for your year and engine, and consider replacement by a qualified technician if you’re unsure about the process. Regular maintenance keeps performance, efficiency, and reliability at their best.
