Heating and Cooling› Thermostats, Housings and Fillers

Rein

87°C Coolant Thermostat Insert

$8.40

SKU: CTI0003

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Rein CTI0003 is an OE-quality coolant thermostat insert designed to match original equipment design specifications. This unit is temperature calibrated to 87 degrees Celsius to maintain optimal engine operating temperatures and includes all necessary gaskets or seals for a direct-fit installation.
Show original supplier description
The Rein CTI0003 is an OE-quality coolant thermostat insert engineered to serve as a direct replacement for factory components. This thermostat is precisely calibrated to 87 degrees Celsius, providing consistent and reliable response to the cooling system's needs. Each unit is supplied with the gaskets or seals necessary for a complete installation, minimizing the need for additional parts. By matching original equipment design specifications and tolerances, this insert ensures a smooth installation process for professional technicians and vehicle owners alike.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandRein
Part NumberCTI0003
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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