A Guide to Replacing Direct Ignition Coils on a 2012-2016 Honda Civic
Fix your Civic's engine misfire, rough idle, and check engine light by understanding and replacing a faulty ignition coil.
- A flashing check engine light is a critical warning; avoid driving to prevent catalytic converter damage.
- This is an easy and fast DIY repair for most owners, requiring only a 10mm socket.
- To ensure reliability, choose an OEM-equivalent brand like Denso or NGK for your replacement coil.
- Confirm which coil is bad by swapping it with another cylinder and seeing if the trouble code follows the coil.
Is Your Civic Running Rough? It Could Be an Ignition Coil.
If your normally reliable Honda Civic has started to run poorly, a failing ignition coil is a very common cause. These parts are essential for smooth engine operation, but they can wear out over time. Signs of failure often appear as a sudden engine misfire, shaking at idle, or a loss of power when you try to accelerate. 🎬 Watch: See a breakdown of common bad ignition coil symptoms. The check engine light will almost always come on, and it may even flash, which signals a serious misfire that needs immediate attention to prevent damage to other expensive parts like the catalytic converter.
Choosing the Right Aftermarket Ignition Coil
When shopping for a replacement coil, you don't have to buy the expensive part from a dealership. The aftermarket offers several excellent options, but quality varies. It's best to avoid the cheapest, no-name brands, as forum users and mechanics report they often fail quickly. For this part, sticking with a reputable brand is a smart investment.
Brand Quality Tiers for Your Honda Civic
- OEM-Equivalent Brands: Denso is widely reported to be the Original Equipment Manufacturer (OEM) for Honda, meaning they made the original part that came with your car. Choosing a Denso coil is the closest you can get to buying the genuine Honda part without the dealership markup. NGK is another top-tier Japanese brand known for high-quality ignition components and is also an excellent choice.
- Quality Aftermarket Brands: Brands like Beck Arnley, Hella, and Bremi have a strong reputation for producing reliable parts that meet or exceed OEM specifications. Beck Arnley is particularly known for sourcing parts from OEM suppliers. These are solid choices that balance cost and quality.
- Performance & Standard Brands: MSD and Accel are performance-focused brands that may offer a higher energy output, which is not typically necessary for a stock daily-driven Civic but are still quality options. Prenco falls into the standard replacement category, offering a functional part at a budget-friendly price.
Pro Tip: Swap Coils to Confirm the Problem
If your check engine light gives you a code for a specific cylinder (e.g., P0302 for cylinder 2), you can confirm the coil is bad before buying a new one. Simply swap the suspected bad coil with a coil from a different cylinder (e.g., cylinder 3). Clear the engine codes and drive the car. If the code changes to P0303, you've confirmed the coil is the problem.
Installation: An Easy DIY Job
Replacing the ignition coils on a 2012-2016 Civic with the 1.8L engine is one of the easiest repairs you can do. The coils are located right on top of the engine, held in by a single bolt.
- Let the engine cool down completely.
- Remove the plastic engine cover (if equipped).
- Locate the four ignition coils. They are in a row on the valve cover.
- Press the tab on the electrical connector and pull it off the coil.
- Use a 10mm socket to remove the single bolt holding the coil in place. 🎬 Watch: This video shows you how to remove the coil.
- Gently twist and pull the coil straight up to remove it.
- Apply a small amount of dielectric grease to the boot of the new coil to protect it and make future removal easier.
- Press the new coil into place, reinstall the 10mm bolt, and reconnect the electrical connector.
Known Issues, Recalls, or TSBs
Searches of the National Highway Traffic Safety Administration (NHTSA) database and for Technical Service Bulletins (TSBs) did not find any specific recalls or service campaigns for ignition coil failure on the 2012-2016 Honda Civic. While other recalls exist for this vehicle generation, they are unrelated to the ignition system. Failure of this part is typically due to normal wear and tear from age, heat, and mileage.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Coil | $50 - $121 |
| New OEM Coil (Dealer) | $73 - $105 |
| Shop Labor | $40 - $60 |
| Total (DIY) | $50 - $121 |
| Total (at a shop) | $126 - $215 |
Frequently Asked Questions
Should I replace all four ignition coils at once?
It is not strictly necessary, but it is often recommended. Ignition coils are exposed to the same conditions and tend to fail around the same time. If one has failed, the others may not be far behind. Replacing them all at once can save you from future breakdowns and repeated repair jobs. If budget is a concern, replacing just the failed coil is perfectly acceptable.
What happens if I don't replace a bad ignition coil?
Driving with a bad coil will cause a constant engine misfire. This leads to poor performance, bad fuel economy, and rough running. Most importantly, a flashing check engine light indicates that unburned fuel is being sent into the exhaust, which can quickly overheat and destroy your expensive catalytic converter, turning a simple repair into a very costly one.
Is Denso really the same as the Honda part?
Yes, Denso is a major OEM supplier for Honda and many other Japanese automakers. An aftermarket Denso coil is manufactured to the same quality standards as the part you would buy in a Honda box from the dealer.
Do I need to replace the spark plugs at the same time?
It's a great idea. A worn or fouled spark plug can put extra strain on the ignition coil, potentially causing it to fail prematurely. Since you have to remove the coil to access the spark plug anyway, it's the perfect time to replace them if they are due. Honda typically recommends spark plug replacement around 100,000 miles.
🎬 See this guide for replacing both spark plugs and coils.What is the difference for 2016 models?
The 2016 model year was a transition year. While some base models may use the same parts as the 2012-2015 Civics, the newer 2.0L and 1.5L Turbo engines introduced in 2016 use different ignition coils. It is critical to verify your specific engine and part number before ordering for a 2016 Civic.
Helpful Videos
Technical Specifications
OEM Part Numbers: 30520-R1A-A01
Fits 2012-2015 Honda Civic with 1.8L engine. Also fits some 2016 base models. Verify fitment for 2016 models with 2.0L or 1.5L engines, as they use a different part.
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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.
- Honda Civic:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Civic Running Rough? It Could Be an Ignition Coil.
- Choosing the Right Aftermarket Ignition Coil
- Brand Quality Tiers for Your Honda Civic
- Pro Tip: Swap Coils to Confirm the Problem
- Installation: An Easy DIY Job
- Known Issues, Recalls, or TSBs
- Frequently Asked Questions
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