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OPparts 40538184 Engine Coolant Thermostat OE Replacement

Manufacturer

Picture for manufacturer OPparts

Part Number

40538184
6 reviews
Sale Price

$81.40

1 left at this price

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Usually delivered within 2 days

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Product Details

The OPparts 40538184 is an OE-quality engine coolant thermostat engineered to restore proper temperature regulation in your vehicle's cooling system. OPparts specializes in precision replacement components for Asian-market vehicles, and this thermostat is manufactured to meet or exceed original equipment specifications for a direct-fit installation.

The thermostat controls coolant flow between the engine block and radiator by opening and closing at calibrated temperature thresholds. This ensures the engine reaches its ideal operating temperature quickly during warm-up and maintains it consistently under varying load conditions — directly impacting fuel efficiency, emissions performance, and long-term engine health.

Key Features:

  • Manufactured to OE specifications for precise temperature regulation
  • Calibrated opening temperature matches original equipment thresholds
  • Direct OEM-style fit for straightforward replacement installation
  • Supports proper engine warm-up, fuel efficiency, and emissions compliance
  • Built to strict quality control standards consistent with OPparts' OE-replacement line

A failing thermostat can cause engine overheating, poor fuel economy, and sluggish warm-up times. The OPparts 40538184 is a reliable, cost-effective solution that restores your cooling system to factory-calibrated performance.

Great prices. Easy checkout. Easy to navigate on the website.

I didn't realize that the product I purchased required two separate skus. Your competition informed me of this, otherwise I would've only ended up with half the rack needed.

Quick and easy.

I am so pleased! Autoplicity had the best price by far for the item I ordered. I was not familiar with them so having the Paypal option was perfect. Over all I saved $30 on an item that was close to $100. Shipping was VERY reasonable and quick. I ordered my item on Saturday. They shipped it right away and I received it on Wednesday. I am definitely an Autoplicity fan and will recommend them to my friends not to mention our mechanic. He found the item I wanted on sale through another major company. Just to double check, I searched online and Autoplicity blew that company out of the water with their pricing and service for the exact same item. Very nice!

The best prices and fast shipping!

So far so good

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