A Comprehensive Guide to Spark Plugs for the 2012-2017 Buick Verano
Keep your Verano's engine running smoothly by understanding and choosing the right replacement spark plugs.
- The 2.4L and 2.0L Turbo engines require different spark plugs; ensure you buy the correct part for your vehicle.
- ACDelco Iridium plugs are the Original Equipment part and a highly reliable choice for replacement.
- The recommended replacement interval for original iridium plugs is approximately 100,000 miles.
- Always verify the spark plug gap before installation, even if the plugs are advertised as pre-gapped.
Symptoms of Failing Spark Plugs
When spark plugs wear out, they can cause noticeable problems with your Verano's performance. Because they are a normal wear-and-tear item, you will eventually need to replace them. Look out for these common signs:
- Rough Idle: Your engine may shake or vibrate more than usual when you're stopped at a light.
- Poor Acceleration: The car may feel sluggish or hesitant when you press the gas pedal.
- Reduced Fuel Economy: You might find yourself visiting the gas station more often because worn plugs can't burn fuel efficiently.
- Engine Misfires: You may feel a stumbling or jerking from the engine, which is often a sign of a misfire.
- Check Engine Light: A misfiring cylinder will almost always trigger the check engine light. Common codes include P0300 (random misfire) or P0301-P0304 (cylinder-specific misfires).
Critical: Choose the Right Plug for Your Engine
The 2012-2017 Buick Verano was available with two different engines: the standard 2.4L Ecotec 🎬 Watch this step-by-step spark plug replacement for the 2.4L engine. and the optional 2.0L Turbo. 🎬 See how to change plugs on the 2.0L Turbo engine. These engines require different spark plugs. The 2.0L Turbo engine runs hotter and needs a "colder" heat range spark plug to perform correctly and avoid engine damage. Always confirm which engine your Verano has before purchasing parts.
Choosing an Aftermarket Spark Plug
When it's time for a replacement, you have many options. Here’s how they generally stack up for your Verano:
- OEM-Equivalent Brands (ACDelco, NGK, Denso): ACDelco is the original equipment (OE) manufacturer for General Motors. Choosing ACDelco Iridium plugs is the safest way to restore original performance. NGK and Denso are also top-tier brands that supply original parts to many automakers and are excellent, reliable alternatives.
- Quality Aftermarket Brands (Bosch, Champion, Autolite): These are well-respected brands with a long history of making quality ignition parts. Their iridium and platinum plugs are a dependable choice for a daily driven Verano and often provide great value.
- Performance Brands (MSD): While known for high-performance applications, these are generally not necessary for a stock Buick Verano.
- Budget-Friendly Brands (Skyward): These brands offer a low-cost alternative for basic transportation needs, but may not offer the same longevity as iridium plugs from premium manufacturers.
Pro Tip: The original spark plugs in the Verano are iridium, designed to last up to 100,000 miles. It is highly recommended to replace them with new iridium plugs to maintain the original performance and long service interval.
Known Issues, Recalls, and TSBs
There are no specific recalls from the National Highway Traffic Safety Administration (NHTSA) for spark plugs on the 2012-2017 Buick Verano. However, there are numerous Technical Service Bulletins (TSBs) related to engine misfires (code P0300), where checking and replacing spark plugs is a primary diagnostic step. A recall (NHTSA 16V595) was issued for some 2016 Verano models with the 2.0L Turbo engine for a misrouted fuel line, but this is not related to the spark plugs themselves.
Frequently Asked Questions
How often should I change the spark plugs on my Buick Verano?
The original ACDelco Iridium spark plugs have a recommended replacement interval of around 100,000 miles under normal driving conditions. However, some service schedules for the 2.0L Turbo model suggest a shorter interval of 60,000 miles. If you experience any failure symptoms, you should inspect them sooner.
What is the correct spark plug gap for my Buick Verano?
The spark plug gap is critical. For the 2.4L engine, the gap is typically 0.040 inches. The 2.0L Turbo engine often requires a smaller gap, around 0.035 inches. While most premium plugs come pre-gapped, it is essential to verify the gap with a feeler gauge before installation.
Do I need to use anti-seize on the new spark plugs?
Most modern spark plugs from brands like ACDelco and NGK have a special nickel plating that prevents seizing. These manufacturers often recommend NOT using anti-seize compound, as it can act as a lubricant and cause you to over-torque the plug, potentially damaging the threads in the engine's cylinder head. Always follow the plug manufacturer's instructions.
Is changing the spark plugs on a Verano a difficult job?
No, it is considered a relatively easy DIY job. The spark plugs are located on top of the engine and are easily accessible after removing the plastic engine cover and ignition coils. 🎬 Follow this guide to safely remove and replace ignition coils. The job typically takes less than an hour with basic tools like a socket wrench, an extension, and a 5/8" spark plug socket.
Helpful Videos
Technical Specifications
OEM Part Numbers: ACDelco 41-108 (Typically for 2.4L) ACDelco 41-109 (Typically for 2.0L Turbo)
The 2012-2017 Buick Verano uses 14mm thread, tapered seat, 5/8" hex iridium spark plugs. The standard 2.4L engine typically requires a gap of 0.040". The 2.0L Turbo engine uses a different heat range plug and often a smaller gap around 0.035". Always confirm the part number and gap for your specific engine.
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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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