A-Premium Radiator Expansion Tank w/Cap — Direct-Fit for Acura TL & Honda Accord V6 (2003–2008)

A-Premium's Engine Radiator Coolant Expansion Reservoir Overflow Tank with cap is a direct-fit replacement coolant overflow bottle designed for Acura TL (2004–2008) and Honda Accord V6 (2003–2008).

This non-pressurized expansion tank stores excess coolant, helps maintain correct coolant level, and comes complete with a twist cap for simple installation. Molded from heat-resistant PA plastic with a single mounting hole and engineered to match OEM reference numbers 603-227 and 19101RCAA00, it offers an affordable repair option for routine cooling-system maintenance.

How does this overflow tank restore proper cooling-system operation?

Replacing a cracked or leaking reservoir stops coolant loss and prevents air from entering the cooling loop. This A-Premium tank recreates the original fluid reserve location so the cooling system can recover and redistribute coolant as temperatures change.

• Non-pressurized design matches original reservoir behavior
• Includes matching twist cap for secure sealing
• Single mounting hole simplifies alignment with existing bracket
• Direct-fit references (603-227, 19101RCAA00) ease cross-referencing

Will this part fit my Acura TL or Honda Accord?

The reservoir is made to fit Acura TL 2004–2008 V6 3.2L and 2007–2008 V6 3.5L models, plus Honda Accord V6 2003–2008 3.0L models. Always confirm compatibility using your vehicle Year/Make/Model selection before ordering.

• Fits Acura TL V6 3.2L (2004–2008) and V6 3.5L (2007–2008)
• Fits Honda Accord V6 3.0L (2003–2008)
• Cross-references OEM numbers for verification
• Use the top-of-page vehicle selector to confirm fitment

What materials and features ensure durability under engine heat?

Constructed from PA (polyamide) plastic, this tank resists the heat and vibration common in engine bays while remaining lightweight. The material choice and molding process reduce the chance of cracks or deformation and meet the functional demands of everyday driving.

• PA plastic resists high temperatures and mechanical stress
• Twist-type cap provides a reliable seal against leaks
• Single robust mounting point for secure attachment
• Non-pressurized form prevents over-stressing system seals

What comes with the replacement tank and what warranty is offered?

The package includes the expansion tank and a matching twist cap so you can install it without sourcing extra parts. A-Premium backs the product with a one-year unlimited-mileage guarantee for added confidence after purchase.

• Package includes: 1 radiator coolant expansion tank and 1 twist cap
• One-year unlimited-mileage warranty from A-Premium
• Sold as a ready-to-install replacement part
• Compatible with a range of Accord/TL V6 models—verify fitment first

Who is this for: This A-Premium expansion reservoir is intended for owners and mechanics who need a dependable, OEM-referenced replacement for cracked, leaking, or aged coolant overflow bottles on compatible Acura TL and Honda Accord V6 vehicles. It’s ideal for DIY installers and repair shops seeking a cost-effective part that restores cooling-system function while offering warranty protection.