A Buick Regal Owner's Guide to Ignition Coil Replacement (2011-2017)
Fix engine misfires and poor performance by understanding your Regal's ignition coil needs.
- A check engine light with codes P0300-P0304 is a strong indicator of a failed ignition coil.
- For best results, replace all four ignition coils and spark plugs at the same time.
- Stick with reputable brands like ACDelco, Delphi, or NGK for long-term reliability on your Regal.
- Do not drive if the check engine light is flashing, as this can quickly damage the catalytic converter.
Is Your Buick Regal Running Rough? It Could Be an Ignition Coil.
If your 2011-2017 Buick Regal is experiencing issues like a shaky idle, hesitation when you accelerate, 🎬 Watch: See what a Buick Regal engine misfire looks like. or a check engine light, a failing ignition coil is a common cause. These coils work hard and are exposed to intense engine heat, which means they eventually wear out. Coils on this generation of Regal typically last around 100,000 miles, but failure can happen sooner. Replacing them is a straightforward job that can restore your engine's smoothness and power.
Choosing the Right Aftermarket Ignition Coil for Your Regal
When shopping for a new ignition coil, you'll find many brands. Not all are created equal. For a GM vehicle like your Buick, sticking with proven brands is key to avoiding future headaches. Here’s a breakdown of your options:
- Premium Aftermarket (OEM Equivalent): Brands like ACDelco and Delphi are often the original equipment manufacturers (OEM) for General Motors. Choosing these brands gives you a part that is identical or very similar to the one your Regal came with from the factory. NGK and Hitachi are also top-tier brands known for excellent quality and reliability in ignition systems.
- Quality Aftermarket: Brands such as Standard Ignition (SMP) and Walker Products have a long history of making reliable replacement parts that meet or exceed OEM specifications. They are a solid choice for a balance of quality and price.
- Economy Brands: The remaining brands like DriveWire, Skyward, and True Tech fall into the economy category. While the low price is tempting, quality can be inconsistent. These may be an option if budget is the absolute top priority, but be aware they may not have the same lifespan or performance as premium brands.
Pro Tip: Replace Coils and Plugs Together
While you can replace just the one failed coil, it's smart to replace them all at the same time, especially if your car has over 100,000 miles. Coils are exposed to the same heat and wear, so if one has failed, others are likely not far behind. Since you have to remove the coils to get to the spark plugs, it's also the perfect time to replace your spark plugs. This saves you from doing the same job twice.
🎬 Watch: Step-by-step guide to replacing Regal turbo plugs and coils.Known Issues, Recalls, and Service Bulletins
Searches for National Highway Traffic Safety Administration (NHTSA) recalls and Technical Service Bulletins (TSBs) for the 2011-2017 Buick Regal did not find any specific issues related to ignition coil failure. There was a recall for older Regal models (2004-2005) related to the ignition key design, but this does not apply to the ignition coils on the 2011-2017 generation.
| Part Type | Estimated Cost |
|---|---|
| New OEM (ACDelco/GM Genuine) | $43 - $114 per coil |
| New Aftermarket | $38 - $138 per coil |
| Shop Labor | $57 - $83 |
Frequently Asked Questions (FAQ)
Do I need to replace all four ignition coils at once?
It is highly recommended. Ignition coils on your engine have all been working for the same amount of time under the same conditions. If one has failed, the others may be nearing the end of their service life. Replacing them all at once prevents you from having to repeat the repair in the near future.
What's the difference between OEM and aftermarket coils?
OEM (Original Equipment Manufacturer) parts, like ACDelco for your Buick, are the same parts the car was built with. High-quality aftermarket brands like Delphi, NGK, or Standard Ignition are designed to meet or exceed OEM quality and are often more affordable. Economy aftermarket brands are cheaper but may have a shorter lifespan and inconsistent quality.
Can I replace the ignition coils myself?
Yes, this is a very DIY-friendly job for most home mechanics. The coils are located directly on top of the engine and are easily accessible after removing the plastic engine cover. Basic tools like a socket set are all that's required.
What happens if I don't replace a bad ignition coil?
Ignoring a bad ignition coil can lead to more serious problems. A continuous engine misfire allows unburned fuel to enter the exhaust system, which can overheat and destroy your expensive catalytic converter. 🎬 Watch: How to fix an engine misfire in four steps. You will also experience poor fuel economy, rough performance, and could eventually stall.
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Technical Specifications
OEM Part Numbers: 12638824 12707304 D522C
This vehicle uses a Coil-on-Plug (COP) ignition system. Each cylinder has its own individual ignition coil. The coils are held in place by a single 10mm bolt and are located on top of the valve cover, underneath the plastic engine cover.
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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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