Hyundai Azera Spark Plug Replacement Guide for 2006-2017 Models
Keep your Azera's V6 engine running strong by choosing the right spark plugs and knowing when to change them.
- Use high-quality Iridium spark plugs from brands like NGK or Denso for OEM performance and longevity.
- The replacement interval for original Iridium plugs is around 100,000 miles, but this will be shorter for cheaper plugs.
- Replacing the three rear spark plugs requires removing the upper intake manifold, making the job significantly more difficult and costly.
- Always replace all six spark plugs at the same time to ensure balanced engine performance and avoid repeating the difficult labor.
Signs of Failing Spark Plugs in Your Azera
When your spark plugs wear out, your Azera's performance will suffer. The signs are usually easy to notice if you know what to look and listen for. Worn plugs can't create a strong enough spark, leading to incomplete fuel combustion.
Common Failure Symptoms
- Rough Idle: Your engine may shake or sound jittery when you're stopped at a light.
- Poor Acceleration: The car feels sluggish and less responsive when you press the gas pedal.
- Worse Fuel Economy: You'll notice you're filling up the gas tank more often. Worn plugs can reduce fuel efficiency by up to 30%.
- Engine Misfires: You may feel a hesitation or stumble from the engine while driving. This can cause the Check Engine Light to flash.
- Difficulty Starting: The engine cranks for a long time before it finally starts, or it may not start at all.
- Check Engine Light: Misfire codes like P0300, P0301, P0302, P0303, P0304, P0305, or P0306 are common. 🎬 Watch: Easy way to diagnose engine misfire codes
Choosing the Right Aftermarket Spark Plugs
Your Azera came from the factory with high-quality, long-life iridium spark plugs, most likely made by NGK. When choosing replacements, it's best to stick with this technology for the best performance and longevity.
Aftermarket brands offer a range of quality and price points:
- Top Tier (OEM-Equivalent): Brands like NGK and Denso are original equipment suppliers for Hyundai and other manufacturers. Their iridium and double platinum plugs are designed to meet or exceed factory specifications. They offer the longest life and most consistent performance. This is the recommended choice for your Azera.
- Mid-Grade: Brands like Bosch and Autolite offer excellent double platinum and iridium options that are a significant upgrade over basic plugs. These are a reliable choice and perform well in the Azera's V6 engine.
- Standard/Economy: Brands like Champion and Skyward often fall into this category. While they are more affordable, they are typically made of copper or single platinum and will not last as long as iridium plugs. You will need to replace them much more frequently, which can be costly given the labor involved in reaching the rear plugs.
Known Issues for 2006-2017 Hyundai Azera
A Technical Service Bulletin (TSB), 09-FL-004, was issued for some 2006-2009 Azera models. This TSB addresses a problem where the engine's computer (ECM) could falsely detect a misfire and trigger a Check Engine Light with codes P0300-P0306, even if the spark plugs and coils are good. The fix involves a software update at a dealership. If you have persistent misfire codes after replacing plugs, this could be the cause.
Cost to Replace Hyundai Azera Spark Plugs
The cost can vary significantly based on the parts you choose and who does the work. The main factor driving labor cost is the need to remove the upper intake manifold to access the rear three spark plugs.
| Item | Estimated Cost |
|---|---|
| Shop Labor | $350 - $600 |
| New Aftermarket Plugs (Set of 6) | $22 - $167 |
| New OEM Plugs (Set of 6) | $140 - $160 |
| Total (DIY) | $22 - $167 |
| Total (Shop) | $372 - $767 |
Frequently Asked Questions
How often should I change the spark plugs on my Azera?
The original factory-installed iridium spark plugs are designed to last for approximately 95,000 to 100,000 miles. If you replace them with less expensive platinum or copper plugs, you will need to change them more often, potentially every 30,000 to 60,000 miles.
Are the rear spark plugs really that hard to replace?
Yes, for most DIY mechanics, the rear plugs are a challenge. They are located near the firewall, and to access them, you must remove the upper intake manifold (surge tank). This involves disconnecting several hoses, sensors, and bolts. While it is a feasible DIY job for someone with mechanical experience, it is not recommended for beginners.
🎬 Watch: 2014 Azera GDI V6 spark plug replacement guideWhat is the difference between Iridium and Platinum spark plugs?
Iridium is a harder, more durable precious metal than platinum with a higher melting point. This allows manufacturers to create a very fine center electrode that requires less voltage to create a spark. The result is a more consistent spark, better ignitability, and a much longer service life, which is why they are used as original equipment in the Azera.
Do I need to gap the new spark plugs?
Most high-quality iridium and platinum spark plugs from brands like NGK and Denso come pre-gapped for your vehicle. However, it is always a good practice to double-check the gap with a feeler gauge before installation to ensure it wasn't changed during shipping. Using an incorrect gap can lead to misfires and poor performance.
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Technical Specifications
OEM Part Numbers: 18846-11070 27410-23700 27410-3C000
The 2006-2017 Hyundai Azera uses a V6 engine requiring 6 spark plugs. The recommended type is Iridium for long life and performance. The front three plugs are easily accessible, while the rear three are located under the upper intake manifold.
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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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