A Guide to Replacing Ignition Coils on the 2012-2017 Buick Verano
Experiencing engine misfires or a rough idle? Your ignition coils might be the culprit.
- A failing ignition coil is a primary cause of misfires (codes P0301-P0304) and rough running in the Verano.
- Replacement is a very simple DIY job, requiring only basic tools and about 30 minutes.
- For best results, choose OEM-grade brands like ACDelco or Delphi, and replace all four coils and spark plugs at once.
- There are no active recalls for ignition coils on this vehicle, so repair costs are the owner's responsibility.
Is Your Verano Running Rough?
A failing ignition coil is a common issue on many modern cars, including the 2012-2017 Buick Verano. When a coil starts to go bad, it can't deliver the high-voltage punch your spark plugs need. This leads to an incomplete burn of fuel and air in the cylinder, a condition known as a misfire. You'll feel this as a shake, stumble, or hesitation from the engine, especially at idle or under acceleration.
Don't Ignore a Flashing Check Engine Light
If your check engine light is flashing, it signals a severe misfire. Unburned fuel is getting into the exhaust, which can quickly overheat and destroy your catalytic converter—a very expensive repair. If the light is flashing, you should reduce driving as much as possible and get the vehicle serviced immediately.
Signs of a Failing Ignition Coil
The symptoms of a bad ignition coil are often very noticeable. Your car isn't just a machine; it will tell you when something is wrong. 🎬 Watch: A breakdown of common bad ignition coil symptoms Pay attention to these common signs:
- Engine Misfires: The engine may shake, sputter, or jerk, especially when idling or accelerating.
- Check Engine Light: A failing coil will almost always trigger the check engine light. Common codes include P0300 (random misfire) or P0301, P0302, P0303, and P0304, which point to a misfire in a specific cylinder.
- Rough Idle: The engine may vibrate or sound uneven when the car is stopped.
- Loss of Power: Your Verano may feel sluggish and slow to accelerate.
- Worse Fuel Economy: When your engine isn't running efficiently, it burns more fuel to compensate.
Choosing the Right Aftermarket Ignition Coil
When shopping for a new ignition coil, you'll find a wide range of brands and prices. For the Buick Verano, the choice generally comes down to three tiers of quality and price.
Tier 1: OEM & Premium Aftermarket
These brands are either the original equipment manufacturer or have a reputation for meeting or exceeding OEM standards. They are your best bet for long-term reliability and performance.
- ACDelco: As GM's official parts brand, this is the closest you can get to the original part your Verano came with.
- Delphi: Delphi was the original parts-making division of GM and is a trusted OEM supplier. Their coils are considered an excellent, high-quality choice.
- NGK / Hitachi / Denso: These are highly respected Japanese brands known for their quality ignition components. They are often OEM suppliers for other carmakers and are a top-tier choice.
Tier 2: Reputable Aftermarket Brands
These brands offer a good balance of quality and value. They are a solid choice for daily drivers and a reliable alternative to the premium brands.
- Standard Ignition (SMP): A long-standing brand in the aftermarket with a reputation for producing dependable parts.
- Walker Products: Known for fuel and engine management parts, Walker offers reliable replacement coils.
- Hella / Holstein: Both are established European and American aftermarket manufacturers with a good track record.
Tier 3: Value-Oriented Brands
These brands focus on providing the most affordable options. They can be a good choice for a budget-conscious repair, but may not offer the same longevity as higher-priced alternatives.
- DriveWire, Global Parts, True Tech: These brands meet the basic need for a functional replacement at a low cost.
Pro Tip: Replace in Sets
It's highly recommended to replace all four ignition coils at the same time, especially if your Verano has over 60,000 miles. Ignition coils are subjected to the same heat and wear. If one has failed, the others are likely not far behind. It's also a great time to replace your spark plugs.
Cost of Replacing Buick Verano Ignition Coils
The cost can vary depending on the brand you choose and whether you do the work yourself. This is a very DIY-friendly job.
| Item | Cost Range |
|---|---|
| Single Aftermarket Ignition Coil | $38 - $138 |
| Set of 4 Aftermarket Coils | $150 - $450+ |
| Shop Labor Cost | $30 - $70 |
| DIY Total (Set of 4 Mid-Grade Coils) | $180 - $280 |
| Shop Total (Set of 4 Mid-Grade Coils) | $210 - $350 |
Frequently Asked Questions
Is it hard to replace the ignition coils on a 2012-2017 Buick Verano?
No, it is a very easy job for a DIYer. The coils are located directly on top of the engine under a plastic cover. The process involves removing one 10mm bolt per coil, unplugging a connector, and pulling the old coil out. Basic hand tools are all that's needed.
Should I replace my spark plugs at the same time?
Yes, it is highly recommended. You have to remove the ignition coils to access the spark plugs anyway. Replacing them together ensures the entire ignition system is fresh and can save you from doing the same job twice.
🎬 Watch: Step-by-step guide to replacing coils and spark plugsMy mechanic says I need a new coil, but the code is for a misfire (P0302). Is that right?
Yes. A failing ignition coil is one of the most common causes of a cylinder-specific misfire code (P0301-P0304). A simple diagnostic test is to swap the suspected bad coil with a coil from a good cylinder. If the misfire code follows the coil to the new cylinder, you've confirmed the coil is the problem.
🎬 See how to diagnose a faulty coil pack yourselfAre there any recalls for the ignition coils on the Buick Verano?
No. While there are several recalls for the 2012-2017 Verano, none of them are for faulty ignition coils. Recalls were issued for issues like the ignition key lock and airbag components.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12630534 12578224 D522C
Coil-on-Plug (COP) design, 4-terminal female connector, single bolt mount.
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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.
- Buick Verano:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Verano Running Rough?
- Don't Ignore a Flashing Check Engine Light
- Signs of a Failing Ignition Coil
- Choosing the Right Aftermarket Ignition Coil
- Tier 1: OEM & Premium Aftermarket
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Value-Oriented Brands
- Pro Tip: Replace in Sets
- Cost of Replacing Buick Verano Ignition Coils
- Frequently Asked Questions
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