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Heating and Cooling› Thermostats, Housings and Fillers

Toyota

Thermostat

$37.91 $27.12 Save $10.79

SKU: 90916-03100

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Toyota Thermostat #90916-03100 is a cooling system component designed to regulate coolant flow between the engine and radiator. This genuine Toyota part helps the engine reach and maintain its optimal operating temperature range.
Show original supplier description
The Toyota Thermostat #90916-03100 is a critical cooling system component that precisely regulates the flow of coolant between the engine and the radiator. By opening and closing at specific temperatures, it ensures the engine can reach and consistently maintain its ideal operating temperature range, which is vital for efficient performance, fuel economy, and longevity. This genuine Toyota thermostat is designed as a direct replacement for the original part, ensuring a factory fit and reliable cooling performance. The part number is 90916-03100, and it is listed under Toyota Genuine parts. This thermostat is compatible with a range of Toyota and Lexus vehicles, including the 4Runner, Land Cruiser, Sequoia, and Tundra models with specific engine displacements such as 4.7L V8 and 4.0L. It is also listed for compatibility with various Lexus models including GS, LS, SC, LX470, and GX470.

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

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Specifications

BrandToyota
Part Number90916-03100
CategoryHeating and Cooling
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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