More Audi Engine Coolant Reservoir Kit - Genuine VW Audi 4M0121403HKT
Genuine VW Audi
SKU: KIT-4M0121403HKT

Audi Engine Coolant Reservoir Kit - Genuine VW Audi 4M0121403HKT

Q7

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Price each: $164.66
Core charges are assigned to parts that have reusable components by manufacturers to encourage the return of the used units. Once you return the old part you will be refunded for your core charge, details regarding the return will be emailed to you once you place the order. Note: The customer is responsible for the cost of return shipping.
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What does this include?

Description

Details

SKU:
KIT-4M0121403HKT
FCP Euro ID:
Quality:
Genuine

OE Numbers

4M0121403D, 4M0121403F, 4M0121403H, 4M0121321H, 4M0121321J, 4M0121321K, 4M0121321Q, N90974701, 00004330473, G12E100M2, G12E0501GDSP, G12E0501GRTU

MFG Numbers

904683

This Kit Includes

Qty Part SKU Brand Price
1 Engine Coolant Reservoir VAG-4M0121403H $87.82
1 Engine Coolant Reservoir Cap VAG-4M0121321Q $55.69
2 License Plate Bracket Bolt VAG-N90974701 $1.78
1 Engine Coolant / Antifreeze ZER-904683 $19.37

Product Information

Audi Engine Coolant Reservoir Kit

This Kit Includes:

  • Genuine Engine Coolant Reservoir
  • Genuine Engine Coolant Reservoir Cap
  • Genuine Engine Coolant Reservoir Screws
  • HT-12 Coolant
Engine Coolant Reservoir Kit

The engine coolant reservoir, also known as an ‘overflow bottle’ is a crucial component of modern vehicle cooling systems. Its job is to capture the increased volume of engine coolant that is created as the coolant is heated and expands. It needs someplace to go, so a coolant line that typically runs from the radiator outlet to the top of the engine coolant reservoir will feed the reservoir, while the reservoir feeds the engine as it needs more coolant to send through the engine and back through the radiator.

Engine coolant reservoirs are typically made of plastic and can be either clear or opaque. Some performance or aftermarket overflow bottles are made of aluminum or other more durable materials.

Engine Coolant Reservoir Kit Failure Symptoms
  • Fogging: Over time, due to chemical exposure, age, and heat cycles, the clear plastic used in most engine coolant reservoirs can become foggy and opaque. This can make it difficult to read the coolant level accurately.
  • Leaks/ Cracking: The most common area for an engine coolant reservoir to leak is usually at a plastic seam or seal. As the bottle is run through thousands of heat cycles, from ambient temperatures below freezing to 200 degrees Fahrenheit plus, the weakest part of the reservoir, usually a seam or molded junction, can crack and fail.
  • Age: Over time, due to age and exposure, the plastic and materials will become brittle and prone to cracking and other age-related failures.
  • Coolant leaks: The most common failure of a bad engine coolant reservoir is a coolant leak. This can be slow or minimal, or it can be a total instant failure of the reservoir. If you notice a slow coolant leak and can diagnose it back to the overflow bottle, or coolant reservoir, it is recommended to replace it asap.
  • Overheating: A bad engine coolant reservoir can reduce engine cooling system pressure, reducing the effective boiling point of the engine coolant. Depending on temperatures and conditions, this can result in engine overheating.

About Genuine VW Audi

The Volkswagen Group, also known as “VAG”, consists of Volkswagen, Audi, Lamborghini, Bentley, Bugatti, Porsche, Ducati, MAN, Scania, SEAT, and Skoda. The original parts used by VAG to build your car are available as replacement parts under the “Genuine VAG” brand. Manufactured under the direction of VAG, expect excellent quality and a premium price since these parts are available exclusively through the VAG Dealership network.

You may not realize this, but the parts that make up your VAG are not necessarily manufactured by VAG. No cause for concern, as VAG designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for VAG for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine VAG parts box and find an OEM branded part inside, simply with the addition of a VAG logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.

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