A Guide to Spark Plugs for the 2004-2010 Nissan Quest
Everything you need to know before tackling this critical, but challenging, maintenance job.
- The rear three spark plugs are extremely difficult to access, requiring removal of the intake manifold.
- Due to the high labor involved, always use high-quality, long-life Iridium or Platinum spark plugs from NGK or Denso.
- This is a very difficult DIY job; professional installation is recommended for most owners.
- A flashing check engine light indicates a severe misfire and should be addressed immediately.
Signs of Failing Spark Plugs in Your Quest
When spark plugs wear out in your Nissan Quest, they can cause noticeable problems. You might experience a rough or shaky idle, where the engine vibrates more than usual. Other common signs include the engine hesitating or feeling sluggish when you accelerate, a decrease in fuel economy, and difficulty starting the engine. In many cases, a failing spark plug will trigger the Check Engine Light. If the light is flashing, it indicates a serious engine misfire that should be addressed immediately to prevent damage to the catalytic converter.
The Rear Spark Plugs: A Major Challenge
Replacing the spark plugs on the 3.5L V6 engine in the 2004-2010 Quest is not a typical job. The front three plugs are easy to access. However, the rear three plugs are buried under the upper intake manifold. To reach them, the entire wiper cowl assembly and the intake manifold must be removed. This turns a simple task into a complex, time-consuming repair that is difficult for most DIY mechanics and expensive at a shop.
Choosing the Right Aftermarket Spark Plugs
Given the extreme difficulty of replacing the rear plugs, it is highly recommended to use high-quality, long-life spark plugs to extend the time between changes as much as possible. While basic copper plugs are available, Platinum or Iridium plugs are the best choice for this vehicle.
- OEM-Equivalent (Good): The original factory plugs are NGK Laser Platinum. Choosing a Double Platinum plug from an OEM supplier like NGK or Denso is a reliable choice that matches the original performance and lifespan. These are designed to last up to 100,000 miles.
- Premium Iridium (Best): Iridium plugs are an upgrade over platinum. They offer the longest life, often exceeding 100,000 miles, and provide a more consistent and stable spark. Brands like NGK Iridium IX or Denso Iridium are top-tier choices. Given the high labor cost for this job, spending a little more on Iridium plugs is a smart investment.
- Other Brands: While brands like Autolite, Bosch, and Champion are available, many Nissan specialists and owners strongly recommend sticking with the Japanese OEM brands, NGK or Denso, for the VQ35DE engine to avoid potential performance issues.
Pro Tip: While you have the intake manifold removed, it is a perfect time to replace the intake manifold gaskets and the valve cover gaskets if they are leaking. The valve cover gaskets, in particular, are a common source of oil leaks that can foul the new spark plugs.
| Item | Estimated Cost |
|---|---|
| Aftermarket Spark Plugs (Set of 6) | $25 - $130 |
| Shop Labor | $335 - $491 |
| Total Professional Replacement | $389 - $627 |
Frequently Asked Questions
Why is replacing the spark plugs on a Nissan Quest so expensive?
The high cost is due to the labor involved. The rear three spark plugs are located under the engine's intake manifold, which must be removed for access. This process is complex and takes several hours, making the labor cost much higher than the cost of the parts.
Can I replace just the three front spark plugs?
While technically possible, it is not recommended. Spark plugs should be replaced as a full set to ensure even engine performance and wear. Replacing only the front three will lead to an imbalance and you will eventually have to perform the difficult rear plug replacement anyway.
What are the OEM spark plugs for the 2004-2010 Quest?
The original equipment manufacturer (OEM) spark plug is the NGK Laser Platinum, part number PLFR5A-11. NGK and Denso are both trusted OEM suppliers for Nissan.
Are there any recalls for the spark plugs on my Quest?
No, there are no specific recalls or technical service bulletins (TSBs) from Nissan or the NHTSA regarding the spark plugs for the 2004-2010 Nissan Quest.
Technical Specifications
OEM Part Numbers: 22401-5M015 22401-EW61C PLFR5A-11
Engine: 3.5L V6 (VQ35DE). Quantity Required: 6. Recommended Material: Iridium or Platinum. Recommended Brands: NGK, Denso.
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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.
- Nissan Quest: