A-Premium Engine Coolant Radiator Assembly for Toyota Corolla/Matrix/Pontiac Vibe 2003–2008 1.8L — Integrated Transmission Oil Coo

The A-Premium Engine Coolant Radiator Assembly with Transmission Oil Cooler replaces the cooling core and adds an integrated transmission oil cooler to restore reliable engine and trans temperatures.

This complete radiator assembly is engineered for direct fitment on Toyota Corolla, Pontiac Vibe and Toyota Matrix model years 2003–2008 with the 1.8L L4 engine. It pairs a corrosion-resistant aluminum core and tanks with a factory-style layout so installation is straightforward. Built to the brand's quality standards, the unit addresses both engine coolant circulation and transmission fluid cooling in one serviceable component.

What vehicle models and years will this radiator fit?

Compatibility covers common compact sedans and hatchbacks that share the Toyota/Pontiac platform and the 1.8L inline-four engine. Confirm stock part numbers or compare core dimensions to ensure a match before purchasing.

• Toyota Corolla 2003–2008, 1.8L L4
• Pontiac Vibe 2003–2008, 1.8L L4
• Toyota Matrix 2003–2008, 1.8L L4
• Cross-check reference codes: 2428, 2432, CU2428, 8012428, 164000D230, 164000D240, 164000D250, 164100D240, 164100D250, 16410YZZAQ

How does the transmission oil cooler integration help overall performance?

Incorporating a transmission oil cooler into the radiator helps control transmission fluid temperatures without the need for a separate external cooler. That integration simplifies plumbing, reduces potential leak points, and keeps transmission fluids in a more stable operating range under load.

• Built-in transmission cooler for compact installation
• Reduces additional hoses and mounting brackets
• Optimizes heat transfer between coolant and transmission fluid

What are the core dimensions and connector sizes I should know?

Knowing the radiator core size and inlet/outlet diameters is essential for fitment and hose compatibility. This assembly lists precise measurements so you can verify clearance and connection details before installation.

• Core height: 23-5/8 inches (approximately 600 mm)
• Core width: 13-11/16 inches (approximately 348 mm)
• Core thickness: 5/8 inch
• Coolant inlet diameter: 1-5/16 inch; coolant outlet diameter: 1-5/16 inch

Is this radiator backed by a warranty and how does quality compare?

A-Premium supplies a one-year, unlimited-mileage guarantee on this radiator assembly, offering buyer protection against manufacturing defects. The product is tested to industry standards to ensure consistent thermal performance and durability, but proper installation and maintenance remain important for long service life.

• One-year unlimited-mileage warranty from A-Premium
• Manufactured to strict testing criteria for performance reliability
• Ships as a complete radiator assembly with transmission cooler included

Who is this for: This radiator assembly is intended for owners and installers replacing a failing or damaged radiator on compatible 2003–2008 Corolla, Vibe, or Matrix vehicles who want a direct-fit, integrated transmission cooler solution. It's well suited for mechanics, DIY enthusiasts, and fleet managers seeking an OEM-style replacement with clear specifications and warranty coverage.