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Part #: 999415

Nissens 999415 A/C Expansion Valve

⚙️ 45 vehicles fit this part
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🚗Fitment: Mercedes-Benz, AMG GT 43, AMG GT 53, AMG GT 63, AMG GT 63 S, C300, C350e, C43 AMG, C63 AMG, C63 AMG S, E300, E400, E43 AMG, E63 AMG S, G550, G63 AMG, GLC300, and GLC43 AMG
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Nissens A/C Expansion Valve for Mercedes-Benz

The Nissens 999415 A/C expansion valve is a block-style HVAC flow restrictor built from aluminum for R134A systems. It is engineered for precise refrigerant metering in Mercedes-Benz applications, including AMG GT, G-Class, C-Class, E-Class, and GLC models.

  • Brand: Nissens
  • Part number: 999415
  • Aluminum construction
  • Block-type A/C expansion valve
  • Refrigerant type: R134A
  • Mounting hardware included
  • O-rings included
  • O-ring quantity: 4
  • Liquid inlet fitting thread diameter: 0.3500
  • Liquid outlet fitting thread diameter: 0.4700
  • Suction inlet fitting thread diameter: 0.7100
  • Suction outlet fitting thread diameter: 0.7100

Fitment Coverage

  • Fits 2021-2022 Mercedes-Benz AMG GT 43, N/A.
  • Fits 2022 Mercedes-Benz AMG GT 53, N/A. Notes: Inlet 1: 35.5mm, Inlet 2: 30 mm, Outlet 1: 11.8 mm, Outlet 2: 17.7 mm.
  • Fits 2019-2021 Mercedes-Benz AMG GT 53, N/A.
  • Fits 2019-2021 Mercedes-Benz AMG GT 63, N/A.
  • Fits 2019-2021 Mercedes-Benz AMG GT 63 S, N/A.
  • Fits 2019-2021 Mercedes-Benz G550, N/A.
  • Fits 2019-2021 Mercedes-Benz G63 AMG, N/A.
  • Fits 2017-2018 Mercedes-Benz C300, N/A.
  • Fits 2017-2018 Mercedes-Benz C350e, N/A.
  • Fits 2017-2018 Mercedes-Benz C43 AMG, N/A.
  • Fits 2017-2018 Mercedes-Benz C63 AMG, N/A.
  • Fits 2017-2018 Mercedes-Benz C63 AMG S, N/A.
  • Fits 2017-2018 Mercedes-Benz E300, N/A.
  • Fits 2018 Mercedes-Benz E400, N/A.
  • Fits 2017-2018 Mercedes-Benz E43 AMG, N/A.
  • Fits 2018 Mercedes-Benz E63 AMG S, N/A.
  • Fits 2017-2018 Mercedes-Benz GLC300, N/A.
  • Fits 2017-2018 Mercedes-Benz GLC43 AMG, N/A.

What This Part Helps Correct

  • Uneven refrigerant flow through the A/C system
  • Weak cabin cooling performance
  • Incorrect evaporator feed control
  • Pressure-related A/C performance issues
  • Leaks at the valve connection points when seals are worn

Installation Notes

Verify the vehicle’s refrigerant system uses R134A before installation. Confirm the inlet and outlet dimensions against the original valve, especially on the 2022 Mercedes-Benz AMG GT 53 application with listed port measurements. Replace the O-rings during service and inspect the mating surfaces for contamination or damage before reassembly. This part cross-references UAC EX10709C and OE numbers 0998300600, A0998300600 for the same application.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent production standards, with a focus on aftermarket fit and function. Part number 999415 is built as a direct-service HVAC component for Mercedes-Benz A/C repair work.

BrandNissens
Part Number999415
MaterialAluminum
Refrigerant TypeR134a
TypeBlock
Mounting Hardware IncludedYes
Liquid Inlet Fitting Thread Diameter0.3500
Liquid Outlet Fitting Thread Diameter0.4700
O-ring Quantity4
O-rings IncludedYes
Suction Inlet Fitting Thread Diameter0.7100
Suction Outlet Fitting Thread Diameter0.7100

This part fits 45 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2022Mercedes-BenzAMG GT 43Base3.0LL6ELECTRIC/GASN/A
2022Mercedes-BenzAMG GT 53Base3.0LL6MILD HYBRID EV-GAS (MHEV)N/AInlet 1: 35.5mm, Inlet 2: 30 mm, Outlet 1: 11.8 mm, Outlet 2: 17.7 mm
2021Mercedes-BenzAMG GT 43Base3.0LL6ELECTRIC/GASN/A
2021Mercedes-BenzAMG GT 53Base3.0LL6ELECTRIC/GASN/A
2021Mercedes-BenzAMG GT 63Base4.0LV8GASN/A
2021Mercedes-BenzAMG GT 63 SBase4.0LV8GASN/A
2021Mercedes-BenzG550Base4.0LV8GASN/A
2021Mercedes-BenzG63 AMGBase4.0LV8GASN/A
2020Mercedes-BenzAMG GT 53Base3.0LL6ELECTRIC/GASN/A
2020Mercedes-BenzAMG GT 63Base4.0LV8GASN/A
2020Mercedes-BenzAMG GT 63 SBase4.0LV8GASN/A
2020Mercedes-BenzG550Base4.0LV8GASN/A
2020Mercedes-BenzG63 AMGBase4.0LV8GASN/A
2019Mercedes-BenzAMG GT 53Base3.0LL6ELECTRIC/GASN/A
2019Mercedes-BenzAMG GT 63Base4.0LV8GASN/A
2019Mercedes-BenzAMG GT 63 SBase4.0LV8GASN/A
2019Mercedes-BenzG550Base4.0LV8GASN/A
2019Mercedes-BenzG63 AMGBase4.0LV8GASN/A
2018Mercedes-BenzC3004Matic2.0LL4GASN/A
2018Mercedes-BenzC300Base2.0LL4GASN/A
2018Mercedes-BenzC350eBase2.0LL4ELECTRIC/GASN/A
2018Mercedes-BenzC43 AMG4Matic3.0LV6GASN/A
2018Mercedes-BenzC63 AMGBase4.0LV8GASN/A
2018Mercedes-BenzC63 AMG SBase4.0LV8GASN/A
2018Mercedes-BenzE3004Matic2.0LL4GASN/A
2018Mercedes-BenzE300Base2.0LL4GASN/A
2018Mercedes-BenzE4004Matic3.0LV6GASN/A
2018Mercedes-BenzE400Base3.0LV6GASN/A
2018Mercedes-BenzE43 AMG4Matic3.0LV6GASN/A
2018Mercedes-BenzE63 AMG S4Matic4.0LV8GASN/A
2018Mercedes-BenzGLC300Base2.0LL4GASN/A
2018Mercedes-BenzGLC3004Matic2.0LL4GASN/A
2018Mercedes-BenzGLC43 AMG4Matic3.0LV6GASN/A
2017Mercedes-BenzC300Base2.0LL4GASN/A
2017Mercedes-BenzC3004Matic2.0LL4GASN/A
2017Mercedes-BenzC350eBase2.0LL4ELECTRIC/GASN/A
2017Mercedes-BenzC43 AMG4Matic3.0LV6GASN/A
2017Mercedes-BenzC63 AMGBase4.0LV8GASN/A
2017Mercedes-BenzC63 AMG SBase4.0LV8GASN/A
2017Mercedes-BenzE3004Matic2.0LL4GASN/A
2017Mercedes-BenzE300Base2.0LL4GASN/A
2017Mercedes-BenzE43 AMG4Matic3.0LV6GASN/A
2017Mercedes-BenzGLC3004Matic2.0LL4GASN/A
2017Mercedes-BenzGLC300Base2.0LL4GASN/A
2017Mercedes-BenzGLC43 AMG4Matic3.0LV6GASN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

0998300600A0998300600EX10709C

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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