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OE: 90916-03129 Thermostat for Toyota Corolla 1.8L | Toyota

Thermostat for Toyota Corolla 1.8L petrol applications, commonly listed for 2003–2009 catalog fitment.
Referenced as OE 90916-03129, and often cross-checked against 90916-A3003 in replacement chains.
Supplied as a standard service replacement for cooling temperature control.

Product Overview

This product is a standard replacement part designed for stable fitment in its intended vehicle applications.

A thermostat directs coolant flow as engine temperature rises.
It helps the cooling circuit reach a stable operating range.
It also supports predictable warm-up behavior in daily driving.
Therefore, it remains a common cooling service item.


Vehicle & Application Scope

This thermostat matches Toyota Corolla 1.8L petrol applications in specific year ranges.
For example, parts catalogs list it for 2003–2009 Corolla 1.8L configurations. 
Engine mappings in catalog listings include 1ZZ-FE and later 1.8L variants.
However, fitment still depends on the exact housing used in that production run.

OE 90916-03129 also sits in a known replacement chain.
Catalogs show 90916-A3003 as a replacement for 90916-03129 in later listings.
So, importers should keep both numbers in cross-reference checks.
This part is not interchangeable with hybrid temperature-control layouts.


Basic Quality & Supply Information

Production follows standardized dimensional control for OE-style fit.
Routine checks confirm sealing face condition and flange consistency.
In addition, valve movement is checked during outgoing inspection.
These controls support stable batch specification in distribution.


Packaging & Ordering Information

Each unit ships in protective individual packaging.
Packaging protects the sealing rim and metal frame from impact.
It also reduces deformation risk during consolidated loading.
Mixed-container orders can include other cooling service items.


Related Sourcing Note

This part is often included in trial orders by importers evaluating new suppliers.
View a sample validation part used for sourcing evaluation:

https://bilinkglobal.com/product/oe-16100-29157-water-pump-for-toyota-probox-1nz-fe/


Ordering FAQ

Is this part suitable for my market?
Yes, if your Corolla 1.8L range matches catalog fitment for OE 90916-03129.

Can it be combined with other parts in one shipment?
Yes. It ships well with radiators, hoses, belts, and coolant service items.

Do you support small trial quantities?
Yes, subject to consolidation plan and packing efficiency.

Sourcing & Ordering FAQ

❓ Is this product suitable for my market?

Product suitability depends on operating conditions, usage intensity, and local expectations.

We evaluate product recommendations based on real application scenarios,

not just vehicle compatibility.

❓ Do you supply OEM or aftermarket versions?

Depending on the product, we can support OEM-standard or verified aftermarket options.

The recommendation is based on quality stability, cost structure, and market positioning — not labels.

❓ Can this product be combined with other parts in one shipment?

Yes.

Consolidated sourcing across categories is one of our core strengths,

helping buyers reduce freight cost and inventory pressure.

❓ How is quality controlled before shipment?

All products are inspected before shipment.

We work with factories that maintain stable production processes rather than short-term output.

❓ Can I start with a trial order?

Yes.

Trial orders are encouraged for new cooperation,

especially for engine and cooling system service parts where consistency matters.

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