A Guide to Replacing Fuel Injectors on the 2011-2022 Toyota 4Runner
Address rough idling and poor fuel economy by understanding fuel injector replacement for your 4.0L V6 4Runner.
- First, check if your 4Runner is part of the fuel PUMP recall, as symptoms are similar and the repair is free.
- It is highly recommended to replace all six fuel injectors at once as a balanced set to save on future labor.
- Replacing injectors is a complex job requiring removal of the intake manifolds; plan on replacing the gaskets as well.
- Choosing between OEM and a quality aftermarket brand like Standard Ignition involves a trade-off between cost and minimizing risk.
Is Your 4Runner's Fuel Injector Failing?
Fuel injector issues on the 5th Generation 4Runner are not widespread, but they can happen as the vehicle ages. The cause is often dirt and contaminants from fuel clogging the injector, or simple wear and tear over many miles. Symptoms often start small and get worse over time.
Important: Check for the Fuel Pump Recall First!
Before you spend money on new fuel injectors, check if your 4Runner is affected by a safety recall for the fuel pump. Certain 2014-2015 and 2018-2019 4Runners were recalled for faulty fuel pumps that can cause symptoms nearly identical to bad injectors, including rough running, engine stalling, and a no-start condition. This is a free repair at any Toyota dealership. You can check your vehicle's VIN on the NHTSA website or Toyota's recall site.
Common Symptoms of a Bad Fuel Injector
- Rough Idle: The engine shakes or vibrates more than usual when stopped.
- Engine Misfires: You may feel the engine hesitate or stumble during acceleration. A flashing check engine light is a sign of a severe misfire that requires immediate attention.
- Poor Fuel Economy: A sudden drop in your average MPG can be caused by a leaking or clogged injector.
- Hard Starting: The engine takes longer than usual to crank and start.
- Fuel Smell: You may notice the smell of raw gasoline inside or outside the vehicle, which could indicate a leaking injector.
Choosing the Right Aftermarket Fuel Injector
When replacing fuel injectors on your 4Runner, you have a choice between Original Equipment (OEM) and aftermarket parts. For a job this labor-intensive, the quality of the part is very important.
- OEM (Original Equipment Manufacturer): These are the same parts Toyota puts in at the factory, often made by Denso. They guarantee perfect fit and performance but come at the highest cost.
- Premium Aftermarket (e.g., Standard Ignition): Brands like Standard Motor Products (SMP) are known to be among the better aftermarket suppliers. They aim to match OEM performance and are often a reliable choice at a lower price point. While some users have great success, there is always a small risk of receiving a defective part compared to OEM.
- Budget Aftermarket: Cheaper, often unbranded injectors found online carry a significant risk. They may fail early, perform poorly, or not match the fuel flow of the other injectors, leading to poor engine performance and requiring you to do the job all over again.
Pro Tip: Replace as a Full Set
The fuel injectors in your 4Runner have all worked for the same amount of time under the same conditions. If one has failed, others are likely not far behind. Because replacement requires removing the intake manifold, it is highly recommended to replace all six injectors at the same time to save on future labor costs.
Cost to Replace 2011-2022 4Runner Fuel Injectors
Costs are estimates and will vary by location and the parts you choose. Prices shown are typically for a single fuel injector.
| Part Type | Estimated Cost (Per Injector) |
|---|---|
| New OEM | $170 - $260 |
| New Aftermarket (Standard Ignition) | $264.68 |
| Remanufactured | $40 - $100 |
| Shop Labor | $300 - $500 |
Frequently Asked Questions
Is it hard to replace the fuel injectors on a 4Runner?
Yes, it is a moderately difficult job. Accessing the fuel injectors on the 4.0L V6 engine requires removing the upper and lower intake manifolds. While possible for an experienced DIY mechanic, it can take several hours and requires careful work to avoid damaging other components or causing fuel leaks.
Should I replace all six fuel injectors at once?
Yes. It is strongly recommended to replace all six injectors as a balanced set. This ensures they all deliver the same amount of fuel and prevents you from having to repeat the labor-intensive replacement process when another original injector fails.
I hear a ticking noise. Is it a bad fuel injector?
Not necessarily. The fuel injectors on the 1GR-FE engine are known to be naturally noisy, producing a distinct ticking sound even when operating perfectly. If the ticking is accompanied by other symptoms like a rough idle or a check engine light, then an injector could be the cause. Otherwise, some ticking is normal for this engine.
What other parts should I replace with the fuel injectors?
Since you must remove the intake manifolds to access the injectors, you should replace the upper and lower intake manifold gaskets at the same time. It is also wise to install new injector O-rings and seals, which often come with new injectors.
Helpful Videos
Technical Specifications
OEM Part Numbers: 23209-39195 23250-31100 23209-39215
For the 4.0L 1GR-FE V6 engine. System uses port fuel injection with one injector per cylinder.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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- Is Your 4Runner's Fuel Injector Failing?
- Important: Check for the Fuel Pump Recall First!
- Common Symptoms of a Bad Fuel Injector
- Choosing the Right Aftermarket Fuel Injector
- Pro Tip: Replace as a Full Set
- Cost to Replace 2011-2022 4Runner Fuel Injectors
- Frequently Asked Questions
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