Mazda 3 Coolant Expansion Reservoir Bottle w/ Cap 2004–2012

Coolant Expansion Reservoir Bottle with Cap for Mazda 3 (2004–2012)

Keep your Mazda 3's cooling system running at peak efficiency with this high-quality aftermarket coolant recovery expansion tank. Engineered to meet or exceed original equipment standards, this reservoir bottle is a direct, no-modification replacement for OE part numbers LF8B-15-350B, 3M5H-8100-AD, and 3M5H8K219AJ.

Key Features

• Direct OE Replacement: Designed specifically for Mazda 3 (2004–2012), ensuring a perfect fit with no modifications required.
• High-Grade Plastic Construction: Made from durable, robust plastic that is resistant to both high and low temperatures for long-lasting reliability.
• Complete Kit: Includes the coolant expansion tank and reservoir cap — ready to install straight out of the box.
• OE-Level Performance: Maintains proper engine temperature across a variety of driving conditions.
• 100% Brand New: This is a premium aftermarket product, not a remanufactured or used unit.

Specifications

• Condition: 100% Brand New
• Material: High-Grade Plastic
• Color: White
• Package Weight: Approx. 610g
• Replacing OE Numbers: LF8B-15-350B, 3M5H-8100-AD, 3M5H8K219AJ

Vehicle Fitment

• Mazda 3 – All Models (2004–2009)
• Mazda 3 – All Models with 2.0L Engine (2010–2012)

Package Includes

• 1 × Coolant Expansion Tank
• 1 × Reservoir Cap

Note: This is a high-quality aftermarket product and is not a genuine OEM part. Please verify the fitment and OE part number before ordering to ensure compatibility with your specific vehicle.

Made in Mainland China.

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: Is this coolant expansion tank compatible with my Mazda 3?

A: This coolant expansion reservoir bottle is compatible with all Mazda 3 models from 2004–2009, and Mazda 3 models with a 2.0L engine from 2010–2012. Please verify your vehicle's OE part number (LF8B-15-350B, 3M5H-8100-AD, or 3M5H8K219AJ) before purchasing to confirm fitment.

Q: Does this coolant reservoir come with the reservoir cap?

A: Yes! This kit includes both the coolant expansion tank and the reservoir cap, so it is complete and ready for installation with no additional parts needed.

Q: Do I need to modify my vehicle to install this coolant expansion bottle?

A: No modifications are required. This aftermarket coolant expansion reservoir is designed as a direct bolt-on replacement for the original equipment, making installation straightforward and hassle-free.

Q: Is this a genuine Mazda OEM part?

A: This is a premium-quality aftermarket replacement part, not a genuine OEM Mazda part. It is manufactured to meet or exceed original equipment standards for reliable, long-term performance.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.