An Image of the Genuine Honda Logo reading 'GENUINE OEM PART' 19321-HP5-L10
Cover, Thermostat by Honda 19321-HP5-L10 OEM Hardware 19321-HP5-L10 Off Road Express Peach St
Four Honda off-road vehicles displayed with the Honda logo above them on a white background.
An Image of the Genuine Honda Logo reading 'GENUINE OEM PART' 19321-HP5-L10
Cover, Thermostat by Honda 19321-HP5-L10 OEM Hardware 19321-HP5-L10 Off Road Express Peach St
Four Honda off-road vehicles displayed with the Honda logo above them on a white background.
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Thermostat Cover by Honda

$301.92 USD
Normally Ships in 8-12 Business Days

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SKU: 19321-HP5-L10

Ships Free to USA
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SKU: 19321-HP5-L10

Honda UTV/ATV & Side by Side Thermostats & Thermostat Parts - Available at buywitchdoctors.com

Product Specifications: Genuine OEM Honda Thermostat Cover, Part # 19321-HP5-L10.

Keep your machine running like new with a genuine Honda Thermostat paired with premium maintenance parts from buywitchdoctors.com. The thermostat is a temperature-controlled valve that stays closed while the engine warms up, then opens to let coolant flow to the radiator once the engine reaches operating temperature. This helps your engine warm up quickly, run at a steady temperature, and avoid both overheating on hard rides and running too cold in winter. Riders replace thermostats and thermostat parts when the engine overheats or runs too cool, the temperature gauge swings up and down, coolant leaks from the thermostat housing, or corrosion and old coolant cause the valve to stick.

Why Choose Genuine OEM Honda Parts?

Choosing original equipment manufacturer (OEM) parts ensures your vehicle maintains its factory-standard performance, reliability, and fuel efficiency. Genuine parts eliminate the guesswork of aftermarket alternatives, offering a seamless integration with your engine's configuration.

  • Exact-Fit Design: Matched to Honda's original bolt patterns, sealing surfaces, and dimensions for a leak-resistant fit.
  • Factory-Spec Quality: Built to the same standards as the parts installed on your machine at the factory.
  • Peace of Mind: Skip the trial and error of universal or aftermarket parts that may not seal or align correctly.

Premium Materials & Precision Engineering

Crafted to strict factory tolerances, these components utilize high-grade alloys and chemical-resistant seals. This specialized engineering withstands harsh off-road vibrations, extreme temperatures, and modern fuel additives, preventing premature wear and leaks. Honda thermostats are calibrated to open at your engine's factory-designed temperature, and their housings, seals, and gaskets are matched to the factory cooling system for a leak-free fit.

Comprehensive Model Fitment (2015-Current)

This genuine OEM part is engineered for a wide range of Honda side-by-side (SxS) and all-terrain vehicles (ATV) built from 2015 to the current model year. Please verify your series matches below:

Utility Task Vehicles (UTVs / Side-by-Sides)

  • Pioneer Series: Pioneer 500, Pioneer 520, Pioneer 700, Pioneer 700-4, Pioneer 1000, Pioneer 1000-5, Pioneer 1000-6.
  • Talon Series: Talon 1000R, Talon 1000X, Talon 1000X-4 (including Fox Live Valve editions).

All-Terrain Vehicles (ATVs)

⚠️ IMPORTANT DISCLAIMER: Fitment can vary by production date and sub-model trim. Always verify your exact original equipment part number from your vehicle's schematic or consult a certified technician before finalizing your purchase to guarantee flawless compatibility.

Other Popular Parts & Secondary Accessories

  • Water Pumps: Genuine Honda water pumps circulate coolant through the engine, thermostat, and radiator. If you're replacing a thermostat because of overheating, check the water pump for leaks or worn impeller blades too.
  • Coolant Tanks & Components: Genuine Honda coolant tanks and components hold extra coolant and let the system expand and recover as it heats and cools. Check the tank level and cap after installing a new thermostat, since air can work out of the system and lower the level.
  • Cooling Fans & Components: Genuine Honda cooling fans pull air through the radiator when you're moving slowly or idling. The thermostat and fan work together to control temperature, so make sure the fan turns on as the engine warms up.
  • Coolants: Coolant carries heat away from the engine and protects the cooling system from corrosion and freezing. Refill with the coolant type your Honda owner's manual recommends after replacing a thermostat, and bleed out any trapped air.
  • Water Pump Rebuild Kits: Water pump rebuild kits include the seals, bearings, and gaskets needed to refresh a leaking or worn water pump. Since you'll drain the coolant to replace the thermostat anyway, it's a good time to rebuild the pump too.

Frequently Asked Questions (FAQs)

Q: How do I know if my thermostat needs to be replaced?
A: Common signs include overheating, an engine that takes too long to warm up or runs too cool, a temperature gauge that swings up and down, or coolant leaking from the thermostat housing. A thermostat stuck closed can cause quick overheating, while one stuck open can cause poor running and low heat in cold weather. Your Honda service manual explains how to test the thermostat and when to replace it. Use the factory schematic to confirm the correct thermostat, housing, and gasket or O-ring for your model.

Q: How do mud, water, and heat affect my thermostat?
A: Mud packed in the radiator blocks airflow and forces the cooling system to work harder, which can stress the thermostat and cause overheating. Old or contaminated coolant can lead to corrosion that makes the thermostat stick. On hot days and slow, technical rides, the thermostat stays open longer and cycles more often. Keep your radiator clean, flush and replace coolant at the intervals in your Honda owner's manual, and watch your temperature gauge on hard rides.

PRO TIP: Learn More about Honda OEM vs. Aftermarket Parts

PRO TIP: UTV/ATV Cooling Issues Explained.

PRO TIP: The Complete Guide to UTV & ATV Lubricants, Coolants and Fuel Treatments.

PRO TIP: Signs of a Bad UTV Water Pump: How to Diagnose, Test, and Replace

PRO TIP: Signs Your UTV or ATV Thermostat is Bad (And How to Test It)


Upgrade Your Ride's Cooling System Performance Today
Keep your engine at the right temperature on every ride with a genuine Honda thermostat built for an exact factory fit. Complete the job with water pumps, coolant tanks & components, cooling fans & components, coolants, and water pump rebuild kits, all in one place. Order your genuine Honda replacement components today from buywitchdoctors.com and experience top-tier off-road performance!

Are You Looking to Find Great Places & Adventurous Trails to Ride Your UTV, Side by Side or ATV? Check out these highly recommended places:

General Safety Warning & Installation Requirements

Your safety is our top priority. Whether you are maintaining a Victory® or Indian® Motorcycle, or servicing a UTV, ATV, or Side-by-Side, proper installation is vital to the performance and safety of your vehicle.

Important:
Warning: Failure to follow manufacturer-specified installation procedures and safety requirements can result in mechanical failure, loss of vehicle control, serious injury, or death.

Important Fitment Disclosure

At Witchdoctors, we want to ensure you get back on the road or trail as quickly as possible. Correct fitment is the most critical step in purchasing parts for your Victory® or Indian® Motorcycle. Also for your Polaris®, CFMoto®, Arctic Cat®, Yamaha®, Honda®, Can-Am®, Kawasaki® UTV and ATV.

Verification Required: While we strive for 100% accuracy, vehicle manufacturers often make mid-year production changes. Always verify your specific year, make, and model before finalizing your order.
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Qualifying Retail orders $159.99 or more will receive free ground shipping. Free Shipping Terms and conditions.

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Please see International Shipping page for orders shipping outside the US.

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Product Availability

We show real time product availability. These products normally ship the same business day but may ship from one of our warehouses across the country. If an item requires additional processing time you will be notified.

Returns

If your order arrives and it is not right, we will we'll fix it. We promise!

Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 days of delivery receipt of your item. We will issue a refund to your original payment method.

See our full Return Policy for all of the pertinent details.

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