Replacing spark plugs on a 2017 Hyundai Sonata typically costs between $150 and $300 when done at a shop; DIY parts-only costs are usually around $40 to $100. The exact price depends on engine variant, plug type, and local labor rates.
The 2017 Sonata offered two four-cylinder engines: a 2.4-liter GDI and a 2.0-liter turbocharged GDI. Spark plugs are a wear item, with replacement intervals varying by plug type and manufacturer recommendations. This article breaks down what drives the cost, typical price ranges, and how your specific model might influence the final bill.
Engine options and cost impact
The labor time and access to spark plugs differ slightly between the 2.4L and the 2.0L Turbo, which can affect the overall cost even though the number of plugs is the same. The following outlines typical considerations for each engine option.
- 2.4L GDI I4: Four plugs are replaced in a relatively straightforward access area; parts are generally affordable and labor is standard for a mid-size sedan.
- 2.0L Turbo I4: Four plugs are replaced, but the turbo layout can add a bit more labor time due to tighter spaces and routing around turbo components.
In practice, the cost difference between the two engines is usually modest, with most of the variance coming from labor time rather than the price of the plugs themselves.
What drives the price
Cost is dictated by parts quality, engine design, accessibility, and local labor rates. Here are the main factors that influence the final bill.
- Parts: Spark plug type (copper/platinum vs iridium), brand, and whether the plugs are OEM or aftermarket.
- Labor: Local hourly rates and the estimated time to access and replace all four plugs; turbo engines can push labor higher if access is tight.
- Additional services: If ignition coils, boots, or related components are inspected or replaced during the service, total cost can rise.
Conclusion: A straightforward plug replacement focused on four plugs usually sticks to a narrow price band, but regional rates and engine accessibility can broaden the range.
DIY vs professional service
Doing it yourself can significantly reduce cost by eliminating labor charges, provided you have the tools and torque specs. For most owners, a professional service offers speed, safety, and a warranty on workmanship.
- DIY cost: Parts only, typically about $40 to $100 for four plugs, depending on plug type and brand.
- Professional cost: Commonly around $150 to $300 total in many markets; some shops may charge more if labor rates are high or if extra parts are needed.
Conclusion: If you value convenience, warranty, and speed, a professional replacement is a solid choice; if you’re comfortable with basic tools and torque specs, DIY can be economical.
Getting an accurate quote
To land the best value, obtain quotes from several shops and confirm the exact engine type and spark plug specification for your vehicle. Verify whether the quote includes parts, labor, and any related inspections or recommendations.
- Ask for a fixed price that itemizes parts and labor, and confirm the plug type and the number of plugs (four for the Sonata).
- Ask whether the quote covers any related inspections or coil-related accessories and whether labor includes removal/installation of ignition coils if needed.
- Ask about a warranty on both parts and labor in case a plug misfires or a problem arises after service.
Conclusion: A transparent, itemized quote helps prevent surprises and ensures the service matches your engine’s needs.
Summary
For a 2017 Hyundai Sonata, a spark plug replacement at a shop typically runs about $150 to $300, while parts-only DIY costs are roughly $40 to $100. The exact price depends on the engine variant (2.4L vs 2.0L Turbo), the plug type (iridium/platinum vs copper), and local labor rates. Check your owner’s manual for recommended replacement intervals and confirm plug specifications with your shop before proceeding.
What is the most common problem with the 2017 Hyundai Sonata?
Owner Reported Trouble Spots
- Engine Major. Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
- Paint/Trim.
- Brakes.
- Engine Minor.
- In-car Electronics.
- Electrical Accessories.
- Transmission Minor.
- Exhaust.
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What spark plugs go in a 2017 Hyundai Sonata?
NGK – Iridium IX Spark Plug (BPR6EIX-11): Extreme Ignitability & Durability (Part No. 3903)
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What kills spark plugs quickly?
Pre-ignition can lead to heat building up in the combustion chamber causing the spark plugs to fail. In addition, if the cooling system isn't functioning correctly, it can cause the engine and spark plugs to overheat. This overheating can lead to the spark plug's electrode wearing out faster.
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How often should spark plugs be changed on a Hyundai Sonata?
Every 30,000 Miles
As with the Elantra, the Sonata should have its spark plugs replaced around the 95,000-mile mark.
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