A Home Mechanic's Guide to the 2014-2018 Volvo V60 Engine Coolant Thermostat
Understanding thermostat failure and choosing the right replacement part for your V60.
- Always replace the complete thermostat housing assembly, not just the insert, to prevent leaks.
- A P0128 check engine code is a classic sign of a thermostat that is stuck open.
- Choosing a high-quality OEM or premium aftermarket brand can prevent premature failure and save on labor costs down the road.
- If your engine is overheating, stop driving immediately to prevent catastrophic damage.
Is Your Volvo V60 Thermostat Failing?
A faulty thermostat can cause serious problems. It can fail in two ways: stuck open or stuck closed. If it's stuck closed, your engine will quickly overheat, which can lead to severe engine damage. If it's stuck open, your engine will take a very long time to warm up or may never reach the proper temperature, especially in cold weather. This can trigger your check engine light, hurt fuel mileage, and affect heater performance.
Key Symptoms of a Bad Thermostat:
- Check Engine Light: A common sign is the check engine light with the code P0128, which means the engine coolant temperature is below the normal regulating temperature.
- Temperature Gauge Problems: The gauge on your dashboard might show the engine is overheating (stuck closed) or running too cool (stuck open). You might also see the needle move erratically.
- Poor Heater Performance: If your car's heater isn't blowing hot air, it could be because the engine isn't getting hot enough due to a thermostat that's stuck open.
- Coolant Leaks: You might notice coolant leaking from the thermostat housing area. The plastic housing used on these models can crack over time.
Thermostat Insert vs. The Whole Housing
For the 2014-2018 Volvo V60, the thermostat is part of a plastic assembly. While some cheaper aftermarket options might sell just the small, round thermostat insert, it is highly recommended to replace the entire housing assembly. The original plastic housings are known to become brittle and crack, and trying to install a new insert into an old housing can lead to leaks and a repeat repair. The wide price range for this part ($23 - $225) reflects the difference between buying just the insert versus the complete housing assembly.
🎬 See an overview of the thermostat housing for T6 engines.Choosing the Right Aftermarket Thermostat
When it comes to a critical part like the thermostat, quality matters. A cheap part that fails can leave you stranded and require you to pay for the same labor all over again. Here’s a breakdown of your options:
Brand Quality Tiers
- Premium / OEM-Equivalent: Brands like Genuine Volvo or OEM suppliers such as Behr and Mahle are your safest bet. They are designed to fit perfectly and last. Gates is a well-regarded aftermarket brand often considered a reliable alternative.
- Standard Aftermarket: This category includes brands like Vemo and Motorad. Reviews for these are mixed. While some users have no issues, others report premature failures or leaking seals. These can be a budget-friendly choice, but there is a higher risk compared to premium brands.
- Value Brands: Brands like MTC and Professional Parts Sweden fall into this category. While they offer significant savings, there is less information available about their long-term reliability for this specific application.
Pro Tip: Many experienced Volvo owners recommend spending a little extra on a Genuine or OEM-equivalent thermostat housing. The peace of mind and reduced risk of a premature failure are often worth the higher initial cost, especially since the labor to replace it is the most expensive part of the job.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Genuine Volvo Housing) | $250 - $320 |
| New Aftermarket (Housing) | $75 - $225 |
| New Aftermarket (Insert Only) | $23 - $50 |
| Shop Labor | $232 - $340 |
Frequently Asked Questions (FAQ)
Can I replace just the thermostat insert instead of the whole housing?
While it is physically possible, it is not recommended for the 2014-2018 Volvo V60. The original plastic housings can degrade and crack. Replacing the entire assembly with a new gasket ensures a proper seal and prevents future leaks from the housing itself.
Is there a recall on the thermostat for my Volvo V60?
No, as of early 2026, there are no widespread NHTSA recalls for the engine coolant thermostat on the 2014-2018 Volvo V60. Always check for the latest information using your vehicle's VIN.
Why is my check engine light on with code P0128?
The P0128 code means the engine's computer has detected that the coolant temperature is not reaching the expected level within a certain amount of time. This is almost always caused by a thermostat that is stuck partially or fully open.
🎬 Watch how to fix a P0128 code and upgrade hoses.How difficult is it to replace the thermostat myself?
This is a moderately difficult job for a DIY mechanic. It requires draining the coolant and, on some engines, may require removing the intake manifold to access the thermostat housing. If you are not comfortable with this level of work, it is best to leave it to a professional.
🎬 Watch this step-by-step DIY guide for replacing the thermostat housing.Helpful Videos
Technical Specifications
OEM Part Numbers: 31355151
For most 2014-2018 V60 models, the thermostat is sold as a complete housing assembly that includes the thermostat, seal, and sometimes a new temperature sensor. The original housing is plastic, but aftermarket aluminum versions are available.
We Have This Part in Stock
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 V60: