Guide to Replacing Ignition Coils on Your 2014-2019 INFINITI Q70
Fix engine misfires and restore your Q70's smooth power by choosing the right new aftermarket ignition coils.
- For best results, choose OEM-supplier brands like Hitachi, NGK, or Delphi.
- It is highly recommended to replace all coils at once, along with the spark plugs, to ensure reliability and performance.
- A flashing check engine light is a serious warning that requires immediate attention to avoid damaging the catalytic converter.
- This is a straightforward DIY repair for those with basic tools, saving significant labor costs.
Signs of a Failing Ignition Coil
When an ignition coil on your Q70 starts to fail, the signs are usually obvious. Because each cylinder has its own coil (a "coil-on-plug" system), a single bad coil can disrupt the engine's smooth operation. You will likely experience one or more of these symptoms:
- Engine Misfires: The car may jerk, sputter, or shake, especially when you accelerate. This is the most common symptom.
- Rough Idle: When stopped, the engine may vibrate or run unevenly.
- Check Engine Light: A failing coil will almost always trigger the Check Engine Light. A flashing light is a serious warning that unburned fuel is entering the exhaust, which can quickly damage your expensive catalytic converters. Common codes include a general misfire (P0300) or cylinder-specific misfires (P0301-P0308).
- Loss of Power: Your Q70 will feel sluggish and won't accelerate as quickly as it should. 🎬 Watch: See a visual guide to bad ignition coil symptoms.
- Reduced Fuel Economy: When a cylinder isn't firing correctly, the engine burns more fuel to compensate.
Flashing Check Engine Light?
If your Check Engine Light is flashing, you should reduce speed and drive as little as possible. Driving with a constant misfire can cause unburned fuel to overheat and destroy your catalytic converter, a very expensive repair.
Choosing the Right Aftermarket Ignition Coil
When replacing ignition coils on your Q70, you have a choice between OEM and a wide range of aftermarket brands. For a critical part like this, quality matters. Sticking with brands known for their ignition components is a smart move.
Tier 1: OEM Supplier & Premium Brands
These brands are either the original equipment manufacturer for INFINITI or have a long-standing reputation for equivalent quality. They are the safest bet for reliability and performance.
- Hitachi: Hitachi is widely considered the OEM supplier for Nissan and INFINITI ignition coils. Choosing Hitachi is essentially like buying the genuine part without the dealership markup. They are the top recommendation for a direct-fit, high-quality replacement.
- NGK: A world-renowned name in ignition systems, NGK coils are manufactured to meet or exceed OEM standards and are an excellent, reliable choice.
- Delphi: Delphi is another major OE supplier for many car brands and produces high-quality ignition components you can trust.
Tier 2: Reputable Aftermarket Brands
These brands offer a good balance of quality and price. They are a solid choice if premium brands are outside your budget.
- Standard Motor Products (SMP): A well-respected brand in the aftermarket, offering parts that are engineered to be reliable replacements.
- Walker Products: Known for engine management and sensor components, Walker offers a dependable alternative.
- Bosch: While more known for European vehicles, Bosch makes quality ignition parts that are a viable option for the Q70.
Tier 3: Economy Brands
These brands compete on price. They can be a solution for a tight budget, but their longevity and performance may not match the higher-tiered brands. This category includes brands like DriveWire, Global Parts, Skyward, and True Tech.
Should I Replace All Ignition Coils at Once?
Yes, it's highly recommended. Ignition coils are exposed to the same heat and wear over time. If one has failed, others are likely nearing the end of their service life. Replacing them all at once saves you from repeated repairs and ensures consistent engine performance. It's also more cost-effective in the long run, especially if you're paying for labor.
Estimated Costs for Ignition Coil Replacement
The cost can vary depending on which brand you choose and whether you do the work yourself. The job is straightforward for a DIY mechanic.
| Item | Estimated Cost |
|---|---|
| Single Aftermarket Ignition Coil | $35 - $120 |
| Single OEM Ignition Coil | $128 - $203 |
| Shop Labor (per coil) | $61 - $90 |
| Total Professional Replacement (per coil) | $240 - $290 |
Frequently Asked Questions (FAQ)
Are there any recalls for the 2014-2019 Q70 ignition coils?
No, there are no specific recalls for ignition coils on the 2014-2019 INFINITI Q70. Searches of the National Highway Traffic Safety Administration (NHTSA) database show recalls for other issues like propeller shafts or software, but none related to ignition coil failure.
Is there a Technical Service Bulletin (TSB) for Q70 ignition coils?
While there are no TSBs that specifically target the 2014-2019 Q70 for ignition coil failure, an older bulletin for the 2003-2008 FX35 (ITB11-017a) mentions misfires and blistered ignition coils caused by a grounding issue. This highlights the importance of ensuring all ground connections are clean and secure during any engine work.
Is replacing an ignition coil a DIY job?
Yes, for most home mechanics this is a very feasible DIY job. The ignition coils are located on top of the engine and are easily accessible after removing the engine cover. Each coil is held in by a single bolt and an electrical connector. The entire job for all six or eight cylinders can typically be done in under two hours with basic hand tools.
🎬 See this step-by-step walkthrough for replacing your ignition coils.Should I also replace my spark plugs?
Absolutely. It is best practice to replace the spark plugs at the same time you replace the ignition coils. Worn spark plugs can strain the new coils, causing them to fail prematurely. Since you will have already accessed the spark plug location to change the coil, doing both at the same time saves significant labor.
🎬 Watch: How to replace spark plugs on the 3.7L engine.Helpful Videos
Technical Specifications
OEM Part Numbers: 22448-EY00A 22448-JA10C 22448-JA00C 22448-1KT1A
Coil-on-plug (COP) design. One coil required per cylinder. The V6 (VQ37VHR) engine uses 6 coils. The V8 (VK56VD) engine uses 8 coils.
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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 Q70: