A Guide to Spark Plugs for the 2012-2016 Volvo S80
Keep your Volvo's engine running smoothly and efficiently by choosing the right spark plugs.
- Stick with OEM-equivalent brands like NGK, Bosch, or Denso for best performance and longevity.
- For turbocharged T6 models, consider replacing plugs sooner than the 60,000-mile interval, around 50,000 miles.
- If you have a 2015-2016 model with a 4-cylinder engine, verify that the updated spark plugs from Service Action S29842 have been installed.
- Always use a torque wrench for installation to avoid costly damage to the engine's cylinder head.
Symptoms of Failing Spark Plugs
When your S80's spark plugs are nearing the end of their life, your car will give you several signs. Ignoring them can lead to more significant engine problems and costly repairs down the road. Common symptoms include:
- Rough Idling: The engine may shake or vibrate when the car is stopped.
- Engine Misfires: You might feel a hesitation or stumble during acceleration as a cylinder fails to fire correctly. This can also trigger a flashing check engine light. 🎬 Watch this guide to see how new plugs restore power.
- Reduced Power: Your car may feel sluggish and slow to accelerate.
- Worse Fuel Economy: Inefficient combustion means you'll be visiting the gas station more often.
- Difficulty Starting: Worn plugs can make it harder for the engine to turn over, especially in cold weather.
Service Action for 2015-2016 Models
Volvo issued Service Action S29842 for some 2015-2016 S80 models equipped with 4-cylinder engines. The original spark plugs could crack due to abnormal combustion. The solution was a replacement with an improved design. If you own one of these models, it is crucial to ensure the correct, updated plugs are installed.
Choosing the Right Aftermarket Spark Plug
When shopping for new spark plugs, you'll find several brands. For a sophisticated European engine like the one in your S80, brand and material quality matter. Iridium is the modern standard for these vehicles, offering the best combination of performance and longevity.
Tier 1: OEM & OEM-Equivalent Brands
These brands are either the original suppliers to Volvo or meet the same high standards. You can install these with confidence.
- Genuine Volvo: These are the parts you would get from a Volvo dealer. They are manufactured by a top-tier brand like Denso or Bosch and packaged in a Volvo box. This is the safest, albeit most expensive, choice.
- NGK: A highly respected Japanese brand known for its quality and reliability. NGK is a popular choice for Volvo owners and is often considered an OEM-quality equivalent.
- Bosch: As a German company, Bosch has a long history of supplying parts for European cars. They are a known OEM supplier for Volvo and an excellent choice for the S80.
- Denso: This brand is a confirmed OEM supplier for Genuine Volvo plugs used in this S80 generation. Choosing Denso is essentially getting the Genuine part without the Volvo-branded box.
Tier 2: Standard Aftermarket Brands
These brands are typically more budget-friendly and widely available. While functional, they may not offer the same longevity or performance as the OEM-tier brands in a demanding turbocharged or direct-injection engine.
- Autolite: Often seen as a reliable budget option, but not commonly recommended by Volvo specialists or enthusiasts for this specific vehicle.
- Champion: Similar to Autolite, Champion plugs are a cost-effective choice but may not be the ideal fit for the performance requirements of the S80's engines.
A Note on Turbocharged (T6) Engines
The 3.0L T6 engine is harder on spark plugs than the naturally aspirated 3.2L engine due to higher combustion pressures and heat from the turbocharger. While the standard replacement interval can be up to 60,000 miles, many specialists recommend a shorter interval of around 50,000 miles for T6 models to maintain peak performance.
Cost of Spark Plug Replacement (2012-2016 Volvo S80)
| Category | Estimated Cost (Set of 6) |
|---|---|
| New Aftermarket (Tier 1) | $60 - $120 |
| New Aftermarket (Tier 2) | $25 - $50 |
| New OEM (Genuine Volvo) | $100 - $200 |
| Shop Labor | $150 - $300 |
Frequently Asked Questions
How often should I replace the spark plugs on my S80?
Volvo's recommendation is typically every 60,000 miles. However, for turbocharged T6 models, many experts suggest shortening this to 50,000 miles to ensure optimal engine health. If you notice any symptoms of failure, they should be inspected and replaced regardless of mileage.
Is replacing spark plugs a DIY job?
Yes, for many owners with basic tools, this is a very manageable DIY task. The process involves removing the plastic engine cover and then removing the ignition coil on top of each spark plug. The key is to work carefully, keep debris out of the engine, and use a torque wrench for installation.
🎬 Follow this walkthrough for 3.0 and 3.2 liter engine replacements.Do I need to gap the new spark plugs?
No. High-quality iridium and platinum spark plugs from brands like NGK, Bosch, and Denso come pre-gapped from the factory. Attempting to adjust the gap can damage the fine-wire electrode. Always verify you are buying the correct part number for your specific engine.
Should I replace my ignition coils with my spark plugs?
It is not required. Unlike spark plugs, ignition coils are not a routine maintenance item and should only be replaced if they are failing. However, since you have to remove the coils to access the plugs, some owners choose to replace them at the same time if the vehicle has very high mileage to save on future labor.
🎬 See this expert overview of P3 ignition coils and plugs.What happens if I don't tighten the spark plugs correctly?
Using a torque wrench is critical. Under-tightening can allow a plug to loosen, causing poor performance and potential damage. Over-tightening is even worse, as it can damage the threads in the engine's cylinder head, leading to a very expensive repair.
Helpful Videos
Technical Specifications
OEM Part Numbers: 31286359 32290011 8642661 31673604
The recommended spark plugs for this generation are typically Iridium-tipped for long life and consistent performance. They come pre-gapped from the manufacturer.
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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.
- Volvo S80:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of Failing Spark Plugs
- Service Action for 2015-2016 Models
- Choosing the Right Aftermarket Spark Plug
- Tier 1: OEM & OEM-Equivalent Brands
- Tier 2: Standard Aftermarket Brands
- A Note on Turbocharged (T6) Engines
- Cost of Spark Plug Replacement (2012-2016 Volvo S80)
- Frequently Asked Questions
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