A-Premium Engine Radiator Coolant Expansion Reservoir Overflow Tank for Nissan Altima/Maxima 2007–2014 — Heat-Resistant Plastic wi

A-Premium Engine Radiator Coolant Expansion Reservoir Overflow Tank with cap is a direct-fit replacement coolant expansion tank engineered for Nissan Altima (2007–2013) and Maxima (2009–2014) models to restore proper coolant overflow control and reduce under-hood heat stress.

When a cracked or leaking coolant reservoir threatens engine cooling performance, replacing it with a reliable, OEM-referenced unit solves leaks and helps maintain correct coolant levels. This A-Premium expansion tank is molded from heat-resistant plastic, supplied with a one-piece cap, and matches the factory fit for the specified Altima and Maxima engines. It arrives without a sensor port (sold separately on some OE versions) and is built to withstand vibration and temperature cycles common under the hood.

Will this overflow tank fit my Nissan Altima or Maxima?

Yes — this tank is made to replace specific factory part numbers and fits the listed model years and engine types. Confirm the part numbers or check your vehicle’s original reservoir to ensure compatibility before ordering.

• Compatible models: Nissan Altima 2007–2013 (2013 Coupe only) L4 2.5L and V6 3.5L
• Also fits: Nissan Maxima 2009–2014 V6 3.5L
• OEM reference numbers: replaces 21710JA000, 21710ZN50A, 603-247

How durable and reliable is the A-Premium expansion tank?

The tank uses high-temperature plastic designed to resist cracking, swelling, and vibration damage from everyday driving. It undergoes quality inspection to help ensure a durable service life that meets routine cooling system demands.

• Constructed from heat- and vibration-resistant plastic
• Manufactured to withstand under-hood temperature cycles
• Includes a one-piece pressure cap for sealing the system

What performance or maintenance benefits can I expect?

Replacing a worn or leaking reservoir helps restore the cooling system’s ability to manage extra coolant during thermal expansion, preventing low coolant levels and overheating risk. A sound expansion tank contributes to consistent cabin heating and supports overall engine thermal efficiency.

• Helps maintain proper coolant level and pressure balance
• Reduces risk of coolant leaks and related engine heat issues
• Supports better heater core performance and system efficiency

Is installation straightforward and are sensors required?

Installation is usually a basic DIY job for someone with moderate automotive experience: drain a small amount of coolant, unbolt the old tank, route hoses, and secure the new unit. Note this replacement tank is supplied without a sensor; if your vehicle uses a level sensor, you may need to transfer the sensor from the old tank or purchase one separately.

• Typically bolts into the factory mounting locations
• Hoses and clamps reuse or replace as needed
• Sensor port not populated — transfer original sensor if required

Who is this for: The A-Premium expansion tank is aimed at Nissan owners who need a reliable, cost-effective replacement for a cracked, leaking, or aged coolant reservoir. It suits DIY mechanics, independent shops, and fleet maintenance teams seeking a direct-fit alternative to the OEM part numbers listed. If your Altima or Maxima matches the stated years and engines and you want a durable tank with a included cap and a one-year unlimited-mileage guarantee, this is a practical replacement choice.