Ignition Coil Guide for the 2004-2013 INFINITI QX56
Keep your QX56's V8 running smoothly by understanding how to choose the right aftermarket ignition coils.
- A flashing check engine light indicates a severe misfire; pull over immediately to prevent catalytic converter damage.
- For best reliability, choose OEM-equivalent brands like Hitachi or NGK.
- It is strongly recommended to replace all eight ignition coils and spark plugs at the same time for longevity and performance.
- This is a very DIY-friendly repair that requires only basic tools and can save you hundreds in labor costs.
Is Your QX56 Ignition Coil Failing?
A bad ignition coil can cause noticeable problems with your engine's performance. Because each cylinder has its own coil, a single failure can throw off the entire engine's balance. Watch for these common symptoms:
- Engine Misfires: The most common symptom. You'll feel a jerking or sputtering during acceleration, and the engine may shake or vibrate at idle.
- Check Engine Light: A failing coil will almost always trigger the Check Engine Light. A flashing light indicates a serious misfire that could damage your catalytic converter. Common codes include P0300 (random misfire) and P0301-P0308 (for specific cylinders).
- Reduced Power and Fuel Economy: With one or more cylinders not firing correctly, your engine has to work harder, leading to sluggish acceleration and more frequent stops for gas.
- Difficulty Starting: A weak or failed coil can make it hard to start the engine, especially from a cold start.
Choosing the Right Aftermarket Ignition Coil
When replacing ignition coils, you have several options beyond the expensive dealership parts. For the QX56, the quality of aftermarket parts can be very high, with some brands being the original equipment manufacturer (OEM).
| Brand Tier | Brands | Quality & Performance Assessment |
|---|---|---|
| OEM-Equivalent | Hitachi, NGK | Hitachi is a well-known OEM for many Japanese vehicles, including Infiniti. Choosing Hitachi or NGK is the closest you can get to the original part's performance and longevity without the dealership price tag. These are highly recommended for reliability. |
| Quality Aftermarket | Delphi, Standard Ignition (SMP), Denso | These brands are respected in the aftermarket for producing reliable parts that often meet or exceed OE specifications. They offer a great balance of price and quality, making them a solid choice for most owners. |
| Value-Oriented | DriveWire, Spectra, Walker, Holstein | These brands provide a budget-friendly option. While they can perform well, their longevity and durability may not match the higher-tiered brands. They can be a good choice for older, higher-mileage vehicles or if budget is the primary concern. |
A Note on 2011-2013 Models
Some 2011-2013 QX56 models use two different types of ignition coils—a longer one for the cylinders closer to the radiator and a shorter one for those near the firewall. Always verify the correct part numbers for your specific vehicle and cylinder location before ordering.
Known Issues, Recalls, and Service Bulletins
No specific recalls or Technical Service Bulletins (TSBs) exist for ignition coil failure on the 2004-2013 INFINITI QX56. However, symptoms of a bad coil can sometimes overlap with other known issues. For example, a recall for the 2004-2006 models concerned a faulty ECM relay that could cause stalling, which might be mistaken for an ignition problem. It's always best to diagnose the issue properly using an OBD-II scanner to check for misfire codes.
🎬 See how to fix misfire codes on your Infiniti QX56.Frequently Asked Questions (FAQ)
Should I replace all 8 ignition coils at once?
Yes, it is highly recommended. Ignition coils are exposed to the same heat and wear over time. If one has failed, others are likely not far behind. Replacing them all at once saves you from repeating the labor and ensures consistent performance.
How do I know which cylinder's ignition coil is bad?
An OBD-II scanner will tell you. A code like "P0305" indicates a misfire on cylinder #5. The QX56's V8 cylinders are numbered 1-3-5-7 on the passenger side (front to back) and 2-4-6-8 on the driver's side (front to back).
Is replacing the ignition coils a DIY job?
Yes, for most home mechanics. The coils are located on top of the engine and are easily accessible. The job requires basic hand tools like a 10mm socket and a ratchet. It's a straightforward process of unplugging the electrical connector, removing one bolt, and pulling the old coil out.
Should I replace my spark plugs at the same time?
It's an excellent idea. You have to remove the ignition coils to get to the spark plugs anyway. Doing both jobs at once ensures your entire ignition system is refreshed and saves you from doing the same labor twice.
🎬 Follow this guide to replace your spark plugs and coils.Helpful Videos
Technical Specifications
OEM Part Numbers: 22448-7S015 22448-ZE00A 22448-ZE00C 22448-1LA0A 22448-1LA0B
This vehicle uses a coil-on-plug ignition system with eight individual coils. 2004-2010 models generally use one type of coil (P/N: 22448-ZE00C or similar). 2011-2013 models may use two different coils for front and rear cylinders (P/N: 22448-1LA0A and 22448-1LA0B). Always verify by VIN.
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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.
- INFINITI QX56: