BMW 645CI Expansion Tank Parts

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BMW 645CI
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Belts and Cooling
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Expansion Tank/Coolant Reservoir
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It is highly recommended to replace the pressure cap, 17137516004, please order separately. 1 per car.
BMW 528i, 530i, 535i, 525i, 535i xDrive, 550i, 650i, 528i xDrive, 530xi, 545i & more
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
$49.75
Reg
$51.82
List
$166.47
It is highly recommended to replace the pressure cap, 17137516004, please order separately. 1 per car.
BMW 528i, 530i, 535i, 525i, 535i xDrive, 550i, 650i, 528i xDrive, 530xi, 545i & more
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
$132.99
Reg
$138.53
List
$237.25
KIT FREE SHIPPING
This kit contains the OEM expansion tank and cap along with one gallon of coolant;
BMW 528i, 530i, 535i, 525i, 535i xDrive, 550i, 650i, 528i xDrive, 530xi, 545i & more
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
$105.83
Reg
$110.24
List
$216.04
OE Solutions
BMW 528i, 530i, 525i, 550i, 650i, 528i xDrive, 530xi, 545i, 528xi, 645Ci & more
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
$77.29
Reg
$80.51
List
$122.38

Based on industry averages you can expect to pay between $49.75 and $132.99 for a BMW 645CI expansion tank.

The BMW 645CI expansion tank is a component of the cooling system in the vehicle. It is responsible for holding excess coolant as it expands due to temperature changes. The expansion tank is typically made of plastic and is located near the radiator in the engine compartment. Its purpose is to allow the coolant to safely expand and contract without causing damage to the cooling system.

The typical lifespan of a BMW 645CI expansion tank can vary depending on various factors such as usage, maintenance, and driving conditions. However, on average, it is recommended to replace the expansion tank every 80,000 to 100,000 miles or around 10 years. Regular inspections and maintenance can help prolong the lifespan of the expansion tank and ensure proper functioning of the cooling system.

Signs of a Faulty BMW 645CI Expansion Tank

There are several common signs that may indicate a faulty expansion tank in a BMW 645CI:

  1. Coolant Leaks: One of the most obvious signs is coolant leaking from the expansion tank itself or from any of the associated hoses or connections.
  2. Overheating Engine: If the expansion tank is not functioning properly, it can lead to coolant loss, which in turn can cause the engine to overheat. Keep an eye on the temperature gauge and any warning lights indicating engine overheating.
  3. Low Coolant Level: Check the coolant level regularly, either through the expansion tank's dipstick or the coolant reservoir. A constantly dropping coolant level can signify a leak or a faulty expansion tank.
  4. Visible Damage: Inspect the expansion tank for any visible cracks, splits, or bulging. These physical damages can result in coolant leaks and require immediate replacement.
  5. Sweet Smell: A damaged expansion tank may also emit a sweet smell due to the leakage of coolant onto hot engine components. If you notice an unusual odor, it could be an indication of a problem.
  6. Engine Misfires or Stalling: In some cases, a faulty expansion tank can lead to air being introduced into the cooling system. This air can cause the engine to misfire, run poorly, or even stall.
  7. Low Heater Output: If your vehicle's heater is not producing sufficient heat or the temperature fluctuates significantly, it could be a result of inadequate coolant flow caused by a faulty expansion tank.

If you observe any of these signs, it is recommended to have your BMW 645CI inspected by a qualified mechanic to diagnose the exact issue with the expansion tank and to prevent further damage to the cooling system.

Top BMW 645CI Expansion Tank Manufacturers

Mahle Behr:
Mahle Behr is a renowned automotive parts manufacturer known for its high-quality products. They have been producing expansion tanks for various vehicle brands, including BMW. Mahle Behr expansion tanks are designed to meet or exceed OEM specifications, ensuring a perfect fit and optimal performance. These tanks are made from durable materials that provide resistance against heat and pressure, ensuring long-lasting reliability. With a focus on quality and precision, Mahle Behr expansion tanks are a popular choice among BMW owners looking for reliable replacement parts.

Genuine BMW:
Genuine BMW parts are manufactured exclusively by the auto parts manufacturers chosen by BMW. These manufacturers are held to the highest quality standards set by BMW, ensuring that the parts meet the strict requirements of the vehicle manufacturer. When it comes to expansion tanks, Genuine BMW parts offer the advantage of being the exact same parts used in the original build of the vehicle. This means that they are designed to seamlessly integrate into the BMW's cooling system, providing an optimal fit and function. While Genuine BMW parts may come with a higher price tag, they offer the reassurance of genuine OEM quality and compatibility.

Dorman:
Dorman is a trusted aftermarket automotive parts manufacturer that offers a wide range of replacement components, including expansion tanks. Dorman expansion tanks are designed to match or surpass the specifications of OEM tanks, ensuring reliable performance at a more affordable price point. These tanks undergo rigorous testing to ensure they meet industry standards for durability and functionality. Dorman expansion tanks often incorporate improvements over the original design, addressing common failure points to enhance longevity. While not bearing the BMW brand name, Dorman expansion tanks are a popular choice for those seeking a reliable and cost-effective replacement option.

Shop Deals On BMW 645CI Expansion Tanks

When shopping at AutohausAZ, customers gain several advantages that make obtaining a BMW 645CI expansion tank a seamless and convenient experience. With a vast inventory of high-quality parts, AutohausAZ ensures that finding the right expansion tank for your BMW is a breeze.

One advantage lies in their commitment to providing customers with an extensive selection of genuine BMW parts. This means that when you choose AutohausAZ, you can have peace of mind knowing that you are purchasing a reliable expansion tank specifically designed for your BMW 645CI.

Another benefit is their user-friendly website, which offers a hassle-free shopping experience. The well-organized interface allows customers to easily navigate through different categories and locate the exact expansion tank they need for their vehicle. This saves time and effort, ensuring that you can quickly find what you're looking for.

Furthermore, AutohausAZ values customer satisfaction and prioritizes delivering exceptional service. Their knowledgeable and friendly team is always ready to assist you with any inquiries or concerns you may have regarding the BMW 645CI expansion tank. They strive to ensure that every customer receives the support they need throughout their purchasing journey.

Lastly, AutohausAZ understands the importance of affordability. They strive to provide competitive pricing on all their products, including the BMW 645CI expansion tank. This allows customers to conveniently acquire a high-quality part without breaking the bank.

In conclusion, shopping at AutohausAZ for a BMW 645CI expansion tank offers customers numerous advantages. From their extensive selection of genuine BMW parts, user-friendly website, and commitment to excellent customer service, to competitive pricing, AutohausAZ is dedicated to making the process of obtaining the necessary parts for your BMW a positive and convenient experience.

Auto Parts We Offer for BMW 645CI