90916-03052 Engine Coolant Thermostat for Toyota
Product: Engine Coolant Thermostat
Primary OE: 90916-03052
Item code: TH260727-001
Cross-reference numbers:
90916-03052
Brand: TOYOTA
Configuration: wax-pellet coolant thermostat with metal frame and valve plate
Application reference: Toyota Hilux Vigo TGN16/TGN26 and Fortuner source applications; verify the exact vehicle through VIN, engine data and removed-part comparison.
Inspection focus: valve diameter, flange profile, spring height, bypass valve, temperature marking and seal seat
Supply note: Quote TH260727-001 with quantity, destination and packing requirements; sample approval is available for B2B orders.
90916-03052 identifies a metal-frame thermostat that regulates coolant flow during Toyota engine warm-up and normal temperature control. Yongshang Auto tracks this product as TH260727-001 for quotation, sample review and order traceability.
The source information covers Toyota Hilux Vigo TGN16/TGN26 and Fortuner source applications. Since the OE reference may span several models or production changes, the Model filter stays blank and fitment approval should use vehicle-specific evidence.
Product Technical Specifications
| Product type | Engine Coolant Thermostat |
|---|---|
| Primary OE reference | 90916-03052 |
| Internal item code | TH260727-001 |
| Vehicle brand | TOYOTA |
| Model filter | Intentionally left blank; verify by VIN and engine data |
| Cross-reference numbers | 90916-03052 |
| Configuration | wax-pellet coolant thermostat with metal frame and valve plate |
| Verification method | OE catalogue, VIN, engine code and removed-part comparison |
Warm-Up Control in Toyota Cooling Circuits
When the engine is cold, the thermostat restricts radiator flow so operating temperature can rise efficiently. As coolant temperature reaches the calibrated range, the wax element moves the valve and opens the radiator path.
Correct valve travel helps balance rapid warm-up with heat rejection under load. A thermostat that opens too early, too late or incompletely can affect cabin heat, fuel efficiency and engine-temperature stability.
Toyota Valve and Flange Verification
Confirm the OE number through the Toyota VIN catalogue and record the engine designation and production date. Compare the removed thermostat’s outer diameter, frame height and bypass-valve arrangement.
Check the jiggle valve or air-bleed feature, gasket position and installed orientation. Similar-looking thermostats may use different opening temperatures or valve dimensions.
Cooling-System Preparation and Acceptance
Inspect the valve for free movement and protect the wax element from impact. Replace the specified seal and clean the housing groove without scratching the mating surface.
Refill with approved coolant, bleed trapped air and monitor the first complete warm-up cycle. Confirm stable temperature and inspect the housing for seepage.
Wholesale Supply and Sample Approval
Use 90916-03052 as the principal sourcing reference and TH260727-001 as the internal item code. Include required quantity, destination, carton marking and labelling instructions in the enquiry.
For technical approval, buyers may send VIN details, engine information, temperature specification, measurements and images of the removed thermostat. Mixed cooling-system orders can be reviewed before shipment.
Frequently Asked Questions
What does 90916-03052 control?
It regulates coolant flow between the engine and radiator, supporting fast warm-up and stable operating temperature.
How should this Toyota thermostat be matched?
Use VIN, engine code and production date, then compare the original valve diameter, frame, bypass design and temperature marking.
Which symptoms can indicate a thermostat problem?
Slow warm-up, overheating, unstable gauge movement, weak cabin heating or abnormal radiator-hose temperature can justify diagnosis.
Does installation direction matter?
Yes. The bleed feature, spring side and valve orientation must follow Toyota service information and the original component layout.
What is needed for a wholesale quotation?
Send OE 90916-03052, item code TH260727-001, quantity, destination and packing instructions, plus fitment evidence when required.
Request a 90916-03052 Thermostat Quote
Contact Yongshang Auto with OE 90916-03052, item code TH260727-001, quantity and delivery destination. Confirm compatibility before production ordering or workshop installation.
