How often do you change spark plugs on a Acura TL?
Plug-life guidelines by plug type
These guidelines reflect typical factory recommendations used by many Acura/Honda service channels for the TL across generations. Your exact mileage can vary, so verify with your manual or dealer for your specific year and engine.
- Iridium or platinum spark plugs: approximately 105,000 miles (168,000 km) before replacement is generally advised.
- Copper spark plugs: typically 30,000 to 50,000 miles (48,000 to 80,000 km), depending on driving style and conditions.
In short, the plug material largely determines the replacement interval, with long-life iridium/platinum plugs offering the farthest interval under normal conditions.
Signs your spark plugs may need replacement
Beyond the mileage guidelines, pay attention to how the TL runs. If you notice any of these symptoms, it’s a good idea to inspect or replace the plugs.
- Rough idle or engine misfires
- Reduced throttle response or hesitation
- Decreased fuel economy
- Hard starting or extended cranking time
- Illumination of the Check Engine Light with misfire codes
If you observe these signs, don’t delay a professional check. Even with longer intervals for iridium/platinum plugs, wear, fouling, or ignition system issues can necessitate sooner replacement.
Practical considerations for Acura TL owners
Choosing the right plug type for your TL
Most newer TL models use long-life iridium or platinum plugs, which align with the ~105,000-mile guideline. If you’re restoring or modifying the vehicle, or if your manual specifies copper plugs for a particular engine variant, follow the manufacturer’s recommendation for that setup. Using the wrong type or gap can affect performance and longevity.
DIY vs. professional replacement
Replacing spark plugs on an Acura TL is a manageable task for a competent DIYer with the right tools, especially for coil-on-plug designs. However, some generations have tight access or require special procedures for proper torque and cooling. If you’re unsure, have a certified technician perform the replacement to ensure proper seating and to avoid damaging ignition coils or the threads.
Summary
The typical replacement interval for an Acura TL depends on plug type. Most TLs with iridium or platinum plugs call for about 105,000 miles, while copper plugs generally require replacement around 30,000 to 50,000 miles. Always consult your owner’s manual or a dealer for the exact specification for your year and engine variant, and consider driving conditions and maintenance history when planning replacements. Staying within recommended intervals helps maintain smooth idling, strong acceleration, and good fuel economy.
