What is the purpose of the New OEM Thermostat Assembly, 500544?

The New OEM Thermostat Assembly, 500544, regulates the engine's temperature by controlling the flow of coolant. It ensures the engine operates within the optimal temperature range, preventing overheating and ensuring efficient performance. A properly functioning thermostat is vital for maintaining fuel efficiency and reducing emissions. For example, if the engine runs too cool, it may consume more fuel, while excessive heat can lead to engine damage.

Is the New OEM Thermostat Assembly, 500544 compatible with all vehicles?

The compatibility of the New OEM Thermostat Assembly, 500544, typically depends on the specific make and model of your vehicle. It’s essential to check your vehicle’s manual or consult with a professional to confirm compatibility. Using the correct thermostat is crucial for optimal engine performance and longevity. Many mechanics recommend OEM parts due to their precise fit and reliability, making them a wise choice to maintain your vehicle’s integrity.

How do I know if I need to replace my thermostat assembly?

Signs that your thermostat assembly may need replacement include engine overheating, fluctuating temperature readings, or coolant leaks. If your dashboard indicator shows abnormal temperature levels or you notice steam from under the hood, it may indicate a failed thermostat. Replacing it promptly can avoid significant engine damage and improve overall efficiency. Regular vehicle maintenance checks can help identify these issues early.

What tools are needed to install the New OEM Thermostat Assembly, 500544?

To install the New OEM Thermostat Assembly, 500544, you typically need a ratchet set, a set of sockets, a screwdriver, and a torque wrench. Having sealant or a new gasket may also be required for a proper seal. Familiarizing yourself with your vehicle's service manual can provide specific guidance on the tools and steps necessary for your model. This installation can enhance your vehicle’s performance and ensure longevity.

Can I install the New OEM Thermostat Assembly, 500544 myself?

Yes, you can install the New OEM Thermostat Assembly, 500544 yourself if you have basic mechanical skills and the right tools. It involves draining the coolant, removing the old thermostat, and replacing it with the new one, followed by refilling and bleeding the cooling system. Many find DIY installation rewarding and cost-saving, but if you’re uncertain, it’s advisable to seek professional help to ensure correct installation and functionality.

What are the benefits of using an OEM thermostat assembly?

Using an OEM thermostat assembly like the New OEM Thermostat Assembly, 500544, ensures a perfect fit and reliable performance because it is manufactured to meet the exact specifications of your vehicle. OEM parts are designed to work seamlessly with your engine, reducing the risk of issues that can arise from aftermarket alternatives. This reliability helps maintain engine efficiency and minimizes the likelihood of further repairs, making it a smart investment in the health of your vehicle.

What symptoms indicate a faulty thermostat?

Common symptoms of a faulty thermostat include an overheating engine, erratic temperature gauge readings, or coolant leaking from the thermostat housing. If you experience these issues, it’s crucial to check the thermostat functionality as it directly impacts your engine performance. Failing to address these symptoms promptly can lead to severe engine problems, necessitating costly repairs or replacements of engine components.

How does the thermostat affect engine performance?

The thermostat plays a critical role in maintaining the engine's operational temperature, directly influencing performance and efficiency. If the thermostat is stuck open, the engine fails to reach optimal temperature, leading to reduced fuel efficiency. Conversely, if it’s stuck closed, it can cause overheating. Keeping the thermostat in good working condition is essential to avoid these performance issues, ensuring your vehicle runs smoothly and efficiently under various driving conditions.

Can a failing thermostat impact my vehicle's fuel efficiency?

Yes, a failing thermostat can significantly impact fuel efficiency. When the thermostat is stuck open, the engine runs cooler than desired, leading to a rich fuel mixture that increases consumption. Conversely, if stuck closed, the engine overheats, which can trigger safety mechanisms that limit performance. Maintaining the thermostat in optimal working condition is vital for ensuring your vehicle maximizes fuel economy while minimizing emissions.

Where can I buy New OEM Thermostat Assembly, 500544?

You can purchase the New OEM Thermostat Assembly, 500544 at Ubuy. They offer a wide selection of automotive parts, including genuine OEM components, ensuring reliability and quality. By choosing Ubuy, you benefit from a straightforward purchasing process and access to detailed product descriptions that help you make informed decisions. It’s a great option for those seeking to maintain their vehicle with authentic parts that align with manufacturer specifications.

How to Shop Johnson Evinrude OMC New OEM Otbd Thermostat Assy, Online From Ubuy?

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BRP

Johnson Evinrude OMC New OEM Otbd Thermostat Assy, 378065 393659 434841, 5005440

Brand new, genuine Johnson Evinrude OMC 143 Degree Thermostat Assembly. This is a factory original equipment part, not aftermarket.

BRP

Item #: 7663178

Johnson Evinrude OMC New OEM Otbd Thermostat Assy, 378065 393659 434841, 5005440

85% of respondents would recommend this to a friend

Item #: 7663178

GBP 25

~~GBP 27~~

Price Details

Price

GBP 25

Excluding Shipping, VAT & Custom charges ( Shipping, VAT and custom charges will be calculated on checkout.
If Item price + shipping is below GBP 135, 20% VAT will be calculated on checkout, if it is equal or above GBP 135, no VAT will be charged. )

Availability : In stock

Imported from USA store

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Excluding VAT : VAT will be calculated on the checkout page

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Brand new, genuine Johnson Evinrude OMC 143 Degree Thermostat Assembly. This is a factory original equipment part, not aftermarket.

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What Stands Out

High Precision

Provides accurate temperature regulation, ensuring optimal engine performance and preventing overheating, which enhances vehicle longevity and reliability.

OEM Quality

Manufactured to original equipment specifications, guaranteeing a perfect fit and finish, which helps maintain warranty protections and vehicle performance standards.

Easy Installation

Designed for straightforward installation with minimal tools required, allowing users to save time and effort while ensuring reliable operation after installation.

Product Details

Controller Type	Touch Control
Additional Features	Programmable
Specific Uses For Product	Air Conditioner, Furnace, Heat Pump
Temperature Control Type	thermostatic
Connectivity Technology	Wired
Power Source	Corded Electric
Voltage	24 volts
Display Type	touch screen
Control Type	Touch Control
Control Method	Touch
Connectivity Protocol	Wired
Mounting Type	Wall Mount
Material Type	Metal, Plastic
Brand Name	BRP
Included Components	Thermostat Assembly
Model Number	378065 393659 434841
UPC	745419304874 757183071111
Manufacturer	Johnson Evinrude OMC
Number of Items	1
Manufacturer Part Number	5005440
Color	Silver
Brand	BRP
Special Feature	Programmable
Item Weight	0.8 lbs (360 grams)

What's in the box

Thermostat Assembly

Who Should Buy?

Vehicle Enthusiasts
Ideal for car aficionados seeking reliable OEM parts to maintain vehicle performance and efficiency.
Routine Maintenance
Perfect for users needing to replace defective thermostats during regular vehicle maintenance to ensure optimal engine temperature.
DIY Mechanics
Great for DIYers who prefer high-quality OEM parts for straightforward installation and long-term reliability.

Budget Shoppers
Not ideal for users looking for the cheapest option as OEM parts tend to be pricier than aftermarket alternatives.

Product Description

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Customer Questions & Answers

Question: How to Shop Johnson Evinrude OMC New OEM Otbd Thermostat Assy, Online From Ubuy?

Answer: It’s easy to shop Johnson Evinrude OMC New OEM Otbd Thermostat Assy, online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Johnson Evinrude OMC New OEM Otbd Thermostat Assy, Available to Shop Online in UK?

Answer: Yes, at Ubuy UK this product is available for you to shop at a reasonable price. The Johnson Evinrude OMC New OEM Otbd Thermostat Assy, is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

BRP Thermostats 378065 393659 434841 Editorial Review

The OMC 5005440 Thermostat Ay has received positive feedback from customers. Users have noted that the product works as expected and is a perfect fit as an original part. The delivery service has been praised for being excellent, with on-time delivery and fast shipping. However, some customers have highlighted the absence of rubber gaskets, advising others to remember to purchase them separately. Overall, the OMC 5005440 Thermostat Ay seems to be a reliable and fitting replacement part, with efficient shipping and service, though the lack of rubber seals is an aspect that buyers need to bear in mind.

Customer Reviews & Ratings

4.8

33 customers ratings

5 Star

85%
4 Star

9%
3 Star

6%
2 Star

0%
1 Star

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Pros

Works as expected
Perfect fit as an original part
Great price and fast shipping

Cons

Does not come with rubber gaskets

Platform Trust & Buyer Confidence

4.2/5 9704 reviews

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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot

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“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot

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“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot

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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot

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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot

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Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

GBP 25

~~GBP 27~~

Excluding VAT : VAT will be calculated on the checkout page

Order now and get it around Sunday, November 01

QTY:

Secured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

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Features & Benefits

Factory original equipment part
Genuine Johnson Evinrude OMC product
Brand new
Supersedes multiple part numbers
143 Degree thermostat assembly
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Johnson Evinrude OMC New OEM Otbd Thermostat Assy, 378065 393659 434841, 5005440