How much does it cost to replace spark plugs in an Acura TLX?

For a TLX, spark plug replacement typically costs around $140-$480 for a four-cylinder model and $210-$630 for a six-cylinder model, depending on engine, plug type, and local labor rates.

In practice, the Acura TLX has used different engines over its lifecycle, including 2.0L turbo and 2.4L inline-4 variants for the four-cylinder lineup and the 3.5L V6 in some trims. Costs include parts and labor, and the exact price depends on plug type (iridium vs platinum), accessibility, and any additional services like coil or intake work. The following breakdown helps you estimate and compare quotes from shops.

Engine variants and typical costs

Costs factor in both parts and labor, and vary by engine and plug type. Most TLX variants use four plugs, while V6 variants use six. The ranges below assume standard labor rates around $100-$150 per hour and typical aftermarket or OEM plug prices.

• 4-cylinder TLX (2.0L turbo or 2.4L inline-4): Parts for four plugs typically $40-$100; labor around 1-2.5 hours; total commonly $140-$480.


• 6-cylinder TLX (3.5L V6): Parts for six plugs typically $60-$180; labor around 1.5-3 hours; total commonly $210-$630.

Note: Some modern TLX engines require removing components such as coil packs or the intake plenum to reach the plugs, which can add time and cost. Always ask for a detailed quote that breaks out parts and labor.

What affects the price

Several factors can tilt the final bill up or down, from location to the exact plug type used and potential extra work to access the plugs. The main factors are:

• Engine variant and plug access: Turbo or tightly packed engines often take longer to service.


• Plug type and supplier: Iridium plugs tend to be pricier than basic platinum or copper plugs.


• Labor rates: Shop hourly rates vary by region and by shop reputation.


• Additional parts or services: Replacing coils, boots, or performing component removal can add cost.

To avoid surprise charges, obtain a written estimate that itemizes parts, labor, and any potential additional work.

Ways to save money

Tips to lower cost without compromising safety or performance:

• Shop around and compare quotes from multiple shops, including independent mechanics.


• Ask for aftermarket plugs if compatible with the TLX; they’re often cheaper than OEM options.


• Consider a DIY approach if you have the tools and knowledge, especially for the 4-cylinder models where access is easier.


• Bundle the service with other maintenance to sometimes receive a discount on labor or a packaged price.


• Request a breakdown of labor hours; if a quote seems high, ask for a more precise estimate or alternatives.

Even when saving, prioritize quality parts and proper torque specs to prevent misfires or future issues.

Summary

Spark plug replacement costs for the Acura TLX vary by engine and labor rates. Four-cylinder models generally fall in the $140-$480 range, while six-cylinder models run roughly $210-$630. Prices depend on engine access, plug type, and regional shop rates, so it’s wise to obtain several written estimates and confirm whether any additional work may be needed. Regular maintenance helps keep performance and fuel economy optimal and can prevent larger repairs later on.

How much does it cost to have a mechanic change your spark plugs?

The average cost for a Spark Plug Replacement is between $264 and $390. Labor costs are estimated between $182 and $267 while parts are priced between $82 and $123. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

Do I really need to change my spark plugs at 100,000 miles?

Yes, replacing spark plugs at 100,000 miles is a common and often necessary maintenance task, as many modern vehicles have spark plugs rated to last that long. However, the exact interval depends on your vehicle's make, model, and the type of spark plug installed, so you should always check your owner's manual for the manufacturer's specific recommendation. 
This video explains when to change spark plugs and what happens if you don't: 1mHonest Mechanic ColoradoYouTube · Dec 24, 2023
Why it's important

• Engine performance: Spark plugs that are past their prime can cause rough idling, poor acceleration, and decreased fuel efficiency. 
• Preventing damage: Over time, worn-out plugs can put extra stress on other components, like ignition coils, and may seize in the engine block, making them harder to remove later. 
• Preventative maintenance: Replacing spark plugs is a form of preventative maintenance that can prevent more costly repairs down the line. 

This video explains why it's important to change spark plugs at 100k miles: 52sWhite One Auto, LLCYouTube · May 19, 2021
What to consider

• Owner's manual: Your vehicle's owner's manual is the most reliable source for the correct replacement interval and recommended plug type. 
• Spark plug type: The lifespan of spark plugs varies by material. Iridium plugs are often rated for 100,000 miles or more, while other types like copper or platinum have shorter lifespans. 
• Driving conditions: Severe driving conditions can shorten the life of spark plugs, so your interval may be shorter than recommended if you frequently tow, drive in extreme temperatures, or frequently start and stop. 

How much does it cost to replace spark plugs in Acura TLX?

The average cost for an Acura TLX Spark Plug Replacement is between $275 and $309.

What are signs of spark plugs going bad?

Signs of a bad spark plug include rough idling, engine misfires, difficulty starting the engine, poor acceleration, and decreased fuel economy. You may also notice a loss of engine power, vibrations, or a "check engine" light on the dashboard.
 
Engine performance issues

• Engine misfires: Your car may hesitate, stutter, or "hiccup" while driving, especially when accelerating. 
• Rough idling: The engine may shake, vibrate, or make unusual noises when the car is idling. 
• Poor acceleration: The vehicle may feel sluggish, unresponsive, or lack power when you press the gas pedal. 
• Engine knocking: Some models may also experience a knocking sound. 

Starting and fuel problems 

• Difficulty starting: Your car may struggle to start or require multiple attempts, especially in cold weather. 
• Decreased fuel efficiency: You may notice your car consuming more fuel than usual, leading to higher costs. 
• Unusual exhaust: You might see black smoke or notice a raw fuel smell from the exhaust. 

Other warning signs

• Check engine light: The "check engine" light on your dashboard may illuminate. 
• Vehicle vibration: You may feel excessive vibrations that feel like they're coming from the engine.