A⁠/⁠C expansion valve (TRV) A1638300084

Description

A⁠/⁠C expansion valve (TRV) by MERCEDES, catalog number A1638300084. Confirmed catalog fitment: Mercedes-Benz M-Classe W163 (1998–2005). For an accurate match, compare the number and identification with the removed part and confirm the vehicle specification by VIN. The fitment list is a reference and does not replace a vehicle-specific compatibility check.

AC TRV EXPANSION VALVE. The thermostatic expansion valve (TRV) is a key component of the automotive air conditioning refrigerant circuit designed to meter and atomize refrigerant before it enters the evaporator. The valve regulates refrigerant flow according to evaporator outlet temperature and pressure, ensuring efficient heat exchange and stable cabin cooling performance. The assembly consists of a calibrated orifice housing, temperature-sensitive diaphragm element, spring mechanism and high/low pressure ports. Its operating principle is based on adjusting the flow area in response to refrigerant temperature, preventing evaporator icing and compressor damage. Failure symptoms include insufficient cooling, evaporator freezing, abnormal pressure readings and irregular compressor cycling. Causes may involve contamination, valve sticking or internal wear. Our catalog includes genuine OEM TRV valves, quality aftermarket replacements and inspected used units free from structural damage. Used parts are checked for mechanical integrity and proper sealing surfaces. Selection is based on VIN number, AC system type, compressor model and refrigerant specification. System flushing and receiver-drier replacement are recommended during installation. Timely replacement ensures efficient cooling and compressor protection.

Compatibility

Fits 1 vehicles

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About the manufacturer · MERCEDES

Mercedes‑Benz is a German premium automotive brand and one of the oldest automobile manufacturers in the world, with its history dating back to 1886 when Karl Benz created the first gasoline‑powered automobile. Today the...

Mercedes‑Benz is a German premium automotive brand and one of the oldest automobile manufacturers in the world, with its history dating back to 1886 when Karl Benz created the first gasoline‑powered automobile. Today the brand is part of Mercedes‑Benz Group and is recognized globally as a leading manufacturer of passenger cars, commercial vehicles and genuine automotive spare parts. Under the Mercedes‑Benz brand a wide range of original components is produced for the company’s vehicles, including engine parts, cooling system components, suspension elements, braking systems, transmission components, electronic modules, body parts and various maintenance and service items. Genuine Mercedes‑Benz parts are designed according to strict factory engineering standards and undergo comprehensive quality control throughout the production process. This ensures precise fitment, reliable performance and full compatibility with the vehicles they are intended for. According to feedback from car owners and automotive repair professionals, Mercedes‑Benz genuine parts are highly regarded for their excellent build quality, long service life and dependable operation even under demanding driving conditions. Many users also highlight the perfect fit and ease of installation of original components. The most frequently mentioned drawback is the relatively high price compared with many aftermarket alternatives, although many vehicle owners consider the cost justified due to the durability, safety and preservation of the vehicle’s original factory performance.

Additional information

A⁠/⁠C expansion valve (TRV) by MERCEDES, catalog number A1638300084, is listed for vehicle repair or maintenance. The catalog identifies the item as “A⁠/⁠C expansion valve (TRV)”. Confirmed catalog fitment: Mercedes-Benz M-Classe W163 (1998–2005). Fitment is based on the catalog links between the part and vehicle bodies. It helps narrow the search, but final compatibility must be confirmed for the exact vehicle specification. The primary ordering references are part number A1638300084 and manufacturer MERCEDES. Parts can differ within the same vehicle model by production year, engine, transmission, installation side, or position. Before purchase, compare the number and identification with the removed component and verify body, year, and specification by VIN. Also compare appearance, connectors, mountings, dimensions, and included items whenever those details are relevant to this part. For a reliable match, use the part number, photos of the removed component, and a VIN-based specification check.

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