A Guide to the Serpentine Belt for the 2017-2022 Genesis G90
Understand the signs of a failing serpentine belt on your G90 and how to choose the right replacement.
- Inspect the serpentine belt at each oil change for cracks, fraying, or glazing.
- A failing belt tensioner is a known issue; plan to replace the tensioner and idler pulleys with the belt.
- Quality aftermarket brands like Gates, Continental, and Dayco offer a reliable, cost-effective alternative to OEM parts.
- Do not drive your vehicle if the serpentine belt has broken, as it will cause a loss of power steering and engine cooling.
Is Your G90's Serpentine Belt Failing?
A serpentine belt is a wear item, meaning it needs to be replaced over time. Most belts last between 60,000 and 100,000 miles, but heat and mileage can shorten that lifespan. Ignoring the warning signs can lead to a breakdown if the belt snaps. Watch for these common symptoms of a worn-out belt on your G90.
- Noises From the Engine: A high-pitched squealing or chirping sound, especially when starting the engine or turning the steering wheel, is the most common sign of a slipping or worn belt.
- Visible Wear and Tear: Inspect the belt with the engine off. Look for cracks, missing ribs, frayed edges, or a shiny, glazed appearance on the belt's surface.
- System Malfunctions: If your power steering feels heavy, the A/C isn't blowing cold, or the battery warning light comes on, the belt may be slipping and failing to power those components properly.
- Engine Overheating: The serpentine belt drives the water pump. If the belt fails, the pump stops circulating coolant, causing the engine to overheat quickly.
A Known Issue: Belt Tensioner Failure
While the serpentine belt itself is a standard maintenance part, the belt tensioner on the G90 can be a point of failure, particularly on the 5.0L V8 models. A failing tensioner can't maintain proper pressure, causing the belt to become loose, slip, or wear out prematurely. Symptoms include a grinding or squealing noise and visible wobbling of the belt or tensioner pulley. It is strongly recommended to inspect the tensioner and idler pulleys when replacing the belt and to replace them as a set.
Choosing the Right Aftermarket Serpentine Belt
You don't need to buy a dealership OEM part to get a quality serpentine belt. Reputable aftermarket brands often manufacture the original parts for car companies and offer the same or better quality for less money. For your Genesis G90, brands like Continental, Dayco, and Gates are excellent choices.
- Continental: Often an OEM supplier for European and domestic brands, Continental belts are known for their quiet operation and durability.
- Dayco: A well-regarded brand that is also a major OEM supplier. Dayco belts are a reliable and cost-effective choice.
- Gates: Gates is a top-tier brand known for making high-quality belts and hoses that meet or exceed OEM specifications. A video of a G90 3.3T repair specifically shows a Gates belt being used as the replacement.
Pro Tip: The serpentine belt for the 3.3T engine is ribbed on both sides. Ensure you order the correct double-sided belt for your engine to avoid installation problems.
Cost of Replacing a Genesis G90 Serpentine Belt
The total cost depends on whether you do the job yourself or use a repair shop. The belt itself is affordable, but labor can add to the expense. Shop labor costs for this job typically range from $138 to $202.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Belt | $43.54 - $73.80 |
| New OEM Belt | $74.00 - $92.00 |
| Shop Labor | $138.00 - $202.00 |
| Total Professional Replacement | $181.54 - $299.00 |
Frequently Asked Questions
When should I replace my G90's serpentine belt?
A general guideline is every 60,000 to 100,000 miles, but you should inspect it at every oil change. If you see any cracks, fraying, or glazing, or if you hear any squealing noises, it's time for a replacement.
Should I replace the tensioner and pulleys with the belt?
Yes, it is highly recommended. The belt tensioner and idler pulleys wear out over time. A worn tensioner is a known issue on the G90 and can cause a new belt to fail quickly. Replacing them all at once is a smart preventative measure that saves you from having to pay for the same labor twice.
Is there a recall on the Genesis G90 serpentine belt?
As of early 2026, there are no specific NHTSA recalls for the serpentine belt or its related components on the 2017-2022 Genesis G90. There have been recalls for other issues like turbo oil lines and starter solenoids on some model years.
Can I replace the serpentine belt myself?
For an experienced DIY mechanic, this job is feasible. However, access in the engine bay is tight, particularly on the 3.3T model, and may require removing other components like coolant hoses to route the belt correctly. Due to this complexity and the need for specific tools to release the belt tensioner, beginners may want to leave this job to a professional.
Technical Specifications
OEM Part Numbers: 25212-3LTA0 (3.3L V6) 25212-3F501 (5.0L V8)
The 3.3T V6 engine uses a double-sided ribbed belt. The 5.0L V8 uses a single-sided ribbed belt.
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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.
- Genesis G90: