REIN SX-G84N Benz Coolant Reservoir Kit GLA45 2.0L L4

( Brand: Rein ), ( Manufacturer Part Number: SX-G84N ), ( Ipn: C386 44-41 ), ( Placement On Vehicle: Belts Cooling Radiators Coolers ), ( Compatible Make: Mercedes-benz ), ( Compatible Model: Gla45 Amg ), ( Compatible Year: 2019 2018 2017 2016 2015 ), ( Core Charge: Free No Core Charge ), ( Type: Engine Coolant Reservoir Kit ), ( Universal Fitment: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Rein Engine Coolant Reservoir Kit )

Review REIN Coolant Reservoir Kit Mercedes benz 2.0l L4 Ca fits AMG 2015–2019

The **REIN SX-G84N Coolant Reservoir Kit** is a meticulously engineered, high-performance replacement solution specifically designed to restore optimal cooling efficiency and reliability for the **2015 2019 Mercedes-Benz GLA-Class 45 AMG (W176) with the 2.0L inline-4 turbocharged engine**. This premium kit replaces the original factory coolant reservoir, a critical component that ensures proper coolant circulation, temperature regulation, and long-term engine protection under the demanding conditions imposed by high-performance driving. Crafted from **high-grade, temperature-resistant polycarbonate**, the reservoir is engineered to withstand the extreme thermal cycling and pressure fluctuations inherent in AMG-tuned engines, reducing the risk of cracking, warping, or fluid leakage common issues that can lead to overheating, coolant loss, or even catastrophic engine failure. The kit includes a **genuine OEM-style overflow tube and cap**, both of which are precision-molded to match the exact dimensions and functionality of the original equipment, ensuring a seamless fit and proper pressure relief. Additionally, the reservoir features a **reinforced base and secure mounting bracket**, designed to prevent vibration-induced loosening or detachment, which is particularly important for vehicles subjected to aggressive driving or off-road use. Whether you're restoring factory performance, upgrading to a high-flow cooling system, or simply replacing a worn-out component, this kit delivers the durability, precision, and reliability expected from a Mercedes-Benz AMG application. Backed by REIN s commitment to quality and compatibility, this coolant reservoir kit is an essential upgrade for enthusiasts and professionals seeking to maintain peak engine health in their high-performance GLA-Class.

The **Rein SX-G84N Coolant Reservoir Kit** is a popular aftermarket option for the 2015 2019 Mercedes-Benz GLA 45 AMG (W176) with the 2.0L turbocharged inline-4 engine. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Rein SX-G84N Coolant Reservoir Kit**

1. **Improved Cooling Efficiency**

The Rein reservoir is designed with a larger capacity (typically around 1.5 2L, compared to the stock 1L) and better airflow properties. This can help reduce engine temperatures, especially under heavy loads, aggressive driving, or in high-ambient-temperature conditions. The larger surface area and improved internal baffling may also enhance heat dissipation, reducing the risk of overheating.

2. **Better Material Quality**

Rein uses high-quality polypropylene, which is more durable than the stock plastic. The reservoir is less likely to crack or warp over time, especially under thermal stress. Some users report that the Rein kit lasts longer without signs of degradation.

3. **Easier Installation**

The Rein kit is often praised for its straightforward installation process. The reservoir is pre-assembled with hoses and clamps, reducing the need for custom fittings or extensive modifications. Many users report completing the job in under an hour with basic tools.

4. **Compatibility with Performance Mods**

If you plan to add forced induction (turbo or supercharger), an upgraded intercooler, or other performance upgrades, a larger reservoir can help manage increased heat load. The Rein kit is a common choice among tuners for this reason.

5. **Aesthetic Appeal**

The Rein reservoir has a sleeker, more modern design compared to the stock unit. It blends better with aftermarket intake or exhaust systems and can improve the overall look of the engine bay.

6. **Positive User Feedback**

Many owners of the GLA 45 AMG report noticeable improvements in cooling performance after switching to the Rein kit. Online forums (e.g., MercedesBenzFans, AMGForums) frequently highlight reduced temperature spikes during hard driving or track use.

7. **Warranty and Support**

Rein offers a warranty on their products, and their customer service is generally responsive to issues. This can provide peace of mind compared to some lesser-known brands.

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### **Cons of the Rein SX-G84N Coolant Reservoir Kit**

1. **Potential for Overfilling**

A larger reservoir can be misleading some drivers accidentally overfill the coolant system, leading to pressure issues or coolant leaks. The Rein kit requires careful monitoring of coolant levels, especially after initial fill-ups or top-offs.

2. **Compatibility with Stock Coolant System**

While the Rein kit is designed for the GLA 45 AMG, some users report minor compatibility issues with the stock cooling system s pressure cap or hoses. Ensuring the correct pressure cap (typically 1.0 1.5 bar) is used is critical to avoid leaks or overheating.

3. **Cost**

The Rein kit is more expensive than the stock reservoir (typically $80 $120, depending on the retailer). For owners who are not planning performance upgrades, this may not be justified unless cooling issues are present.

4. **Installation Challenges for DIYers**

Although generally easy, some users find the installation tricky due to tight engine bay space or routing of hoses. Those unfamiliar with engine bay modifications may need to consult a mechanic or detailed installation guides.

5. **Mixed Reviews on Long-Term Durability**

While Rein s materials are generally high-quality, some users report that the reservoir can still degrade over time (e.g., 5 7 years) if exposed to extreme heat or coolant additives. Regular inspections are recommended.

6. **Potential for Coolant Leaks**

If the hoses or clamps are not properly secured during installation, leaks can occur at the connections. Rein provides good-quality hoses, but user error during installation can lead to issues.

7. **Limited Customization**

Unlike some aftermarket kits, the Rein reservoir is not highly customizable in terms of color or additional features. It is a functional upgrade rather than a cosmetic one.

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### **Conclusion**

- Experience overheating under heavy loads or in hot climates.

- Plan to add performance modifications (e.g., turbo upgrades, intercoolers).

- Want an improved cooling system with better material quality.

- Are willing to invest in a kit that offers noticeable benefits over the stock unit.

- Rarely push the engine hard and live in mild climates.

- Are on a tight budget and do not have cooling-related issues.

- Prefer to avoid any risk of overfilling or installation complications.

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### **Recommendation**

- You notice temperature spikes or overheating, especially during aggressive driving or track use.

- You are adding performance modifications that increase engine heat load.

- You prioritize durability and ease of installation over cost savings.

- Your vehicle runs cool under normal conditions, and you are not planning upgrades.

- You are uncomfortable with DIY installations or monitoring coolant levels.

- You find a similarly rated kit at a lower price (though Rein is generally reliable).

Always pair the Rein kit with the correct **Mercedes-approved coolant (Mercedes G13 or equivalent)** and ensure the **pressure cap is set to the manufacturer s specifications** (1.0 1.5 bar). Regularly check coolant levels and top off as needed to maximize performance and longevity. If in doubt, consult a Mercedes specialist or performance tuner for installation advice.

Details:

Rein Coolant Reservoir Kit for 2015 - 2019 Mercedes-Benz GLA45 AMG 2.0L L4 ca: Status: In Stock.

part #: sxg84n prices

• $29.47-$148.99

specifications ocoosys:

• for models: Amg
• for makes: Mercedes
• for years: 2015-2019
• brand: Rein
• mpn: Sx-g84n
• ipn: C386 44-41
• placement on vehicle: Belts Cooling Radiators Coolers
• compatible make: Mercedes-benz
• compatible model: Gla45 Amg
• compatible year: 2019 2018 2017 2016 2015
• core charge: Free No Core Charge
• type: Engine Coolant Reservoir Kit
• universal fitment: Direct Replacement
• bundle description: 1 Pc Genuine Rein Engine Coolant Reservoir Kit

payments ocoosys:

• other
• wallet: Google-pay
• credit card: Diners-club

shipping ocoosys:

• transit: 3-6 Days
• class: Standard, Expedited
• service: Standard, Expedited
• cost: $0.00
• type: Fixed

general ocoosys:

• condition: New
• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components

seller ocoosys:

• # reviews: 648044
• city: Indianapolis, Indiana
• rating: 99.6%

returns ocoosys:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

offer ocoosys:

• quantity: 2
• started: April 21, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

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