How much does it cost to replace spark plugs in a 4runner?
The typical price range for replacing spark plugs on a 4Runner is about $300 to $450 at an independent shop, with higher costs possible at a dealership. DIY parts-only costs are substantially lower. Exact pricing depends on the engine, plug type, and local labor rates.
In this article, we break down what drives the price, lay out realistic cost ranges for different scenarios, and offer practical tips to save money while keeping your 4Runner running smoothly. While most modern 4Runners use a 4.0-liter V6 with six long-life plugs, some older or different configurations may vary in the number of plugs and the replacement interval. Always check your owner’s manual for the recommended interval and plug type for your specific model year.
What affects the price
The final bill is shaped by several key factors, from the parts you choose to how your vehicle is serviced. The following elements typically have the biggest impact on cost:
- Spark plug type and price per plug — modern engines commonly use iridium or platinum long-life plugs, which cost more per plug than copper or standard plugs. Expect roughly $8 to $25 per plug for iridium/platinum, depending on brand and performance ratings.
- Number of plugs — a 4Runner with the common 4.0-liter V6 uses six spark plugs; some older or different configurations may use four. More plugs means higher parts cost and slightly more labor time.
- Labor time and shop rate — independent shops typically charge around $100 to $150 per hour, while dealerships often run higher (roughly $150 to $200 per hour). Time to replace six plugs is usually about 1 to 2 hours, depending on accessibility.
- Additional parts and services — if the ignition coils, coil boots, or a valve cover gasket needs attention, or if intake components must be removed for access, the price can rise. These are not always required but can add to the bill.
- Vehicle accessibility and model year — some model years have slightly different intake plumbing or coil architectures that affect how quickly a tech can reach the plugs.
Understanding these factors helps you estimate a fair price and plan ahead for your 4Runner maintenance schedule.
Estimated price ranges by scenario
These ranges reflect typical pricing you might see in the United States, updated for 2025 market rates. Prices can vary by region and specific model year.
- Do-it-yourself (parts only) — If you buy the plugs yourself and install them, expect about $60 to $180 for six iridium/platinum plugs (lower for copper, higher for premium brands). You’ll save on labor but need the right tools and some mechanical confidence.
- Independent repair shop — For most 4Runner owners, a reputable local shop will charge about $250 to $450 total, including parts and labor, depending on plug type and any necessary ancillary work.
- Dealership — A Toyota dealership typically charges a bit more, often in the $350 to $700 range, driven by higher labor rates and potential OEM-part pricing. Some shops may be lower if only a straightforward plug replacement is needed.
Prices are subject to regional labor rate differences and the exact plug type installed by manufacturer recommendations. Always request a written estimate before authorizing work and ask for a parts-and-labor breakdown.
Do-It-Yourself considerations
Doing the work yourself can yield the biggest savings but requires the right tools, torque specs, and safety precautions. For a 4.0-liter V6, you’ll typically need basic hand tools, a torque wrench, a gap or feeler gauge, and possibly specialty extensions to reach the rear plugs. Follow the manufacturer’s torque specs and inspection steps to avoid damaging coils or valve covers. If you’re uncertain, you can practice on the most accessible plugs first or consult a service manual.
Summary
Replacing spark plugs in most 4Runner models with the 4.0L V6 generally costs between $300 and $450 at an independent shop, with dealership quotes often higher and DIY parts-only costs significantly lower. The price depends on plug type (iridium/platinum vs copper), the number of plugs, labor rates, and whether any additional components require service. Always confirm the recommended replacement interval in your owner’s manual, and obtain a written estimate that includes both parts and labor before proceeding.
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.
How much does it cost to replace spark plugs in a Toyota 4Runner?
The cost to replace the spark plugs in a Toyota 4Runner ranges from about $400 to $800, with dealer service typically being more expensive than an independent mechanic. The price depends on labor rates, whether you use OEM or aftermarket parts, and the specific year and model of your 4Runner.
Cost breakdown
- Dealer: Expect to pay between $405 and $800. This includes higher labor rates and genuine OEM parts, which can also be more expensive.
- Independent mechanic: Costs can range from approximately $327 to $475. These shops may use aftermarket parts, which are often less expensive than OEM parts.
- Parts: Spark plugs themselves can cost anywhere from $3 to $50 or more per plug, depending on the brand and type. For a 4Runner, they can be around $10 to $27 per plug.
Factors that influence the cost
- Labor rates: Labor is a significant portion of the total cost, often higher at dealerships.
- Parts: The price of spark plugs varies by brand and quality. OEM parts from the dealership will be more expensive than aftermarket options.
- Vehicle Year and Model: Older models might have slightly lower part costs, while newer V6 and V8 models can have different labor estimates.
- Engine Access: Some engines, like the 4.0L V6, have spark plugs that are more difficult to access, requiring removal of the intake manifold and other parts, which increases labor time and cost.
DIY vs. Professional
- DIY: If you're comfortable with car maintenance, you can do the job yourself and save a significant amount of money, potentially for under $100 in parts and tools.
- Professional: If you're not comfortable doing the work yourself, professional installation is recommended. It ensures the job is done correctly and safely, avoiding potential damage to your engine.
How much are spark plugs for a 4Runner?
If you're in search of Toyota 4Runner Spark Plugs aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 159 Spark Plugs from top brands with prices ranging from $2.49 to $63.19.
How often should spark plugs be changed on a 4Runner?
Toyota recommends replacing 4Runner spark plugs every 120,000 miles. This is a long-life interval, and it's also a good idea to have them inspected sooner and to check your owner's manual for the most accurate information for your specific model year.
You can watch this video to learn how to replace the spark plugs on a Toyota 4Runner: 51sT4R GarageYouTube · Feb 10, 2024
- Official recommendation: Toyota's recommended interval for most newer 4Runner models is 120,000 miles.
- Owner's manual: Always consult your owner's manual to find the exact replacement schedule for your vehicle.
- Inspection: It is recommended to have spark plugs inspected at the first sign of engine trouble, such as poor acceleration, rough idling, or trouble starting.
- Potential signs of wear:
- Difficulty starting the engine
- Poor or sluggish acceleration
- Engine misfires
- Increased fuel consumption
