Product Intro: 

Haima S7 Expansion Water Tank (SA00-15-350M1-A)

What This Part Is

What It Does

• Deals with coolant expansion and topping it up: When the engine’s running, the coolant heats up and expands—any extra coolant flows right into this SA00-15-350M1-A tank. That way, the cooling system doesn’t get too much pressure (which would break the hoses or radiator). Then when the engine cools down, the coolant shrinks and creates negative pressure—this tank automatically sends the stored coolant back to the system, so the coolant level stays consistent.

• Adjusts pressure and gets rid of air: It’s like a "pressure buffer"—the SA00-15-350M1-A catches steam bubbles from the cooling system (those bubbles would mess with the water pump and make cooling worse), turns them back into liquid, and sends them back to circulate. No more air pockets, pressure stays stable, and the coolant cools the engine evenly.

• Makes checking easy and prevents overheating: The tank has clear MIN/MAX lines, so you or a mechanic can check how much coolant there is without taking apart the main radiator. That means you won’t have the engine overheat because there’s not enough coolant—saves the engine from trouble.

What’s Great About It

• Fits like the original, no hassle: This SA00-15-350M1-A is made exactly to Haima’s factory standards, so it matches the Haima S7’s cooling system perfectly. The mounting holes and hose connectors are just like the original part—you just plug it in and use it, no extra work needed.

• Tough and corrosion-resistant: It’s made of strong engineering plastic that can handle coolants (including antifreeze) for years—no cracking, no warping, no leaking. It also takes extreme temps: whether it’s freezing winters or super hot engine bays, this SA00-15-350M1-A stays in good shape.

• Good sealing and pressure control: If it comes with a sealing cap, the cap keeps the cooling system closed to make the coolant boil at a higher temp. There’s also a pressure relief valve that lets out extra pressure safely—no damage to the system, just reliable cooling.

Which Car It’s For & When to Use It

• The original tank’s broken (cracked, leaking, or the plastic’s old) and that’s causing coolant loss or engine overheating;

• The original tank’s cap or inner parts are broken, making the pressure unstable or keeping it from topping up coolant;

• You’re doing regular maintenance or fixing things after an accident, and you want the cooling system to work like new again.

Key Features of Haima S7 Expansion Water Tank (SA00-15-350M1-A)

• Fits the original perfectly—super easy to replaceIt’s made specifically for the Haima S7 SUV. Its size, ports, and connectors all line up with the original cooling system—no modifications needed at all. The mounting holes and hose connectors are exactly like the OEM part; just take out the old tank and pop this SA00-15-350M1-A in directly—no extra hassle, since it’s built to match the original down to every detail.
• Tough and durable—super low-maintenanceIt’s built with strong engineering plastic that can handle coolants (including antifreeze) for years. No cracking, no warping, no leaking—nothing like that. It even stands up to extreme temps: whether it’s freezing cold winters or scorching hot engine bays, this tank stays in good shape the whole time. You can just install it and forget about it.
• Super easy to check coolant—prevents engine overheatingThere are clear MIN/MAX lines on this SA00-15-350M1-A. You or your mechanic can tell if the coolant level is good just by glancing at it—no need to take apart the main radiator. That means you won’t end up with an overheated engine because of low coolant. Total time-saver, and avoids big headaches.
• Reliable pressure control & air removal—keeps the cooling system steadyIt works like a “pressure buffer”: it catches air bubbles from the cooling system (those bubbles would mess up the water pump and make cooling worse), turns them back into liquid, and sends them back to circulate. No air blockages, so the engine cools evenly. If it comes with a sealed cap, that cap also helps the coolant boil at a higher temp. Plus, there’s a pressure relief valve that lets out extra pressure safely—no damage to the system, just consistent cooling performance.

Haima S7 Expansion Water Tank (SA00-15-350M1-A)

This SA00-15-350M1-A expansion tank is made specifically for the Haima S7 SUV—it’s also a key part of the car’s engine cooling system. Its main perks are super straightforward:It fits the original car perfectly—you can just pop it in when replacing the old one, no random modifications needed. It’s also really durable: made of corrosion-resistant engineering plastic, so it can handle freezing winters or super hot engine bays no problem. Checking if the coolant’s enough is easy too—there are clear MIN/MAX lines on it, just a glance tells you. That way, you won’t have the engine overheating because of low coolant.Plus, it keeps the cooling system stable: it acts like a "pressure buffer" to get rid of air bubbles. There’s also a sealing cap that makes the coolant harder to boil, and a pressure relief valve that safely releases extra pressure. All in all, it works really reliably.

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