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Nissens 73994 HVAC Heater CoreOE Quality 60-Day Returns
Part #: 73994

Nissens 73994 HVAC Heater Core

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Fitment: Volkswagen, Beetle and Passat
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Nissens 73994 HVAC Heater Core

The Nissens 73994 HVAC heater core is built for Volkswagen Passat and Volkswagen Beetle applications that need reliable cabin heat transfer. With an aluminum core and aluminum tanks, this heater core supports efficient thermal performance in a compact OE-style layout.

Key Features

  • Aluminum core material for efficient heat exchange
  • Aluminum tank construction for consistent thermal performance
  • Brazed cooling fins for durable heat transfer design
  • Pipe included for application-specific installation
  • Fits 2012-2021 Volkswagen Passat, N/A
  • Fits 2022 Volkswagen Passat, N/A, Dims.: 160x178x26
  • Fits 2012-2019 Volkswagen Beetle, N/A

Detailed Description

Built by Nissens, part number 73994 is an HVAC heater core developed with the same focus on thermal efficiency that defines the brand’s aftermarket heating and cooling components. The aluminum core and aluminum tank construction help support steady coolant-to-air heat transfer, while brazed cooling fins add structural integrity to the heat exchanger design. This makes the Nissens 73994 a practical replacement for Volkswagen Passat and Volkswagen Beetle heater core service where cabin heat output has declined.

This part cross-references OSC 98030 for the same application.

Common Issues It May Address

  • Weak or inconsistent cabin heat
  • Coolant odor inside the vehicle
  • Fogging or film on interior glass from heater core leakage
  • Restricted heat transfer from a clogged or corroded heater core
  • Temperature imbalance in the HVAC system

Installation Notes and Tips

Verify the vehicle’s year, model, and heater core dimensions before installation, especially on the 2022 Volkswagen Passat application listed with dimensions of 160x178x26. Inspect hoses, seals, and coolant condition during replacement to help prevent repeat service. Confirm pipe orientation and connection points against the removed unit before final assembly.

Quality Assurance

Nissens develops and manufactures thermal management components to consistent quality standards across its aftermarket range. Part number 73994 is built as a replacement heater core for Volkswagen Passat and Volkswagen Beetle applications, with materials and construction selected for dependable HVAC service.

BrandNissens
Part Number73994
Core MaterialAluminum
Tank MaterialAluminum
ConstructionBrazed cooling fins
Core Height6.3000
Core Length7.0100
Core Width1.0200
Pipe IncludedYes

This part fits 105 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2022VolkswagenPassatLimited Edition2.0LL4GASN/ADims.:_160x178x26
2021VolkswagenPassatR-Line2.0LL4GASN/A
2021VolkswagenPassatSE2.0LL4GASN/A
2021VolkswagenPassatS2.0LL4GASN/A
2020VolkswagenPassatR-Line2.0LL4GASN/A
2020VolkswagenPassatSEL2.0LL4GASN/A
2020VolkswagenPassatSE2.0LL4GASN/A
2020VolkswagenPassatS2.0LL4GASN/A
2019VolkswagenBeetleFinal Edition SE2.0LL4GASN/A
2019VolkswagenBeetleFinal Edition SEL2.0LL4GASN/A
2019VolkswagenBeetleSE2.0LL4GASN/A
2019VolkswagenBeetleS2.0LL4GASN/A
2019VolkswagenPassatSE R-Line2.0LL4GASN/A
2019VolkswagenPassatWolfsburg Edition2.0LL4GASN/A
2018VolkswagenBeetleSE2.0LL4GASN/A
2018VolkswagenBeetleCoast2.0LL4GASN/A
2018VolkswagenBeetleDune2.0LL4GASN/A
2018VolkswagenBeetleS2.0LL4GASN/A
2018VolkswagenPassatSE2.0LL4GASN/A
2018VolkswagenPassatS2.0LL4GASN/A
2018VolkswagenPassatSEL Premium3.6LV6GASN/A
2018VolkswagenPassatR-Line2.0LL4GASN/A
2018VolkswagenPassatSEL Premium2.0LL4GASN/A
2018VolkswagenPassatGT3.6LV6GASN/A
2017VolkswagenBeetleClassic1.8LL4GASN/A
2017VolkswagenBeetleS1.8LL4GASN/A
2017VolkswagenBeetleDune1.8LL4GASN/A
2017VolkswagenBeetleR-Line SEL2.0LL4GASN/A
2017VolkswagenBeetleSEL1.8LL4GASN/A
2017VolkswagenBeetleSE1.8LL4GASN/A
2017VolkswagenPassatR-Line1.8LL4GASN/A
2017VolkswagenPassatSEL Premium1.8LL4GASN/A
2017VolkswagenPassatSEL Premium3.6LV6GASN/A
2017VolkswagenPassatSE1.8LL4GASN/A
2017VolkswagenPassatSE3.6LV6GASN/A
2017VolkswagenPassatS1.8LL4GASN/A
2016VolkswagenBeetleDenim1.8LL4GASN/A
2016VolkswagenBeetleDune1.8LL4GASN/A
2016VolkswagenBeetleFleet Edition1.8LL4GASN/A
2016VolkswagenBeetleR-Line S2.0LL4GASN/A
2016VolkswagenBeetleR-Line SEL2.0LL4GASN/A
2016VolkswagenBeetleR-Line SE2.0LL4GASN/A
2016VolkswagenBeetleWolfsburg Edition1.8LL4GASN/A
2016VolkswagenBeetleSEL1.8LL4GASN/A
2016VolkswagenBeetleSE1.8LL4GASN/A
2016VolkswagenBeetleS1.8LL4GASN/A
2016VolkswagenPassatR-Line1.8LL4GASN/A
2016VolkswagenPassatSEL Premium1.8LL4GASN/A
2016VolkswagenPassatSEL Premium3.6LV6GASN/A
2016VolkswagenPassatSEL1.8LL4GASN/A
2016VolkswagenPassatSE1.8LL4GASN/A
2016VolkswagenPassatS1.8LL4GASN/A
2015VolkswagenBeetleFleet Edition1.8LL4GASN/A
2015VolkswagenBeetleR-Line2.0LL4GASN/A
2015VolkswagenBeetleTDI2.0LL4DIESELN/A
2015VolkswagenBeetleClassic1.8LL4GASN/A
2015VolkswagenBeetleBase1.8LL4GASN/A
2015VolkswagenPassatTDI SEL Premium2.0LL4DIESELN/A
2015VolkswagenPassatTDI SE2.0LL4DIESELN/A
2015VolkswagenPassatSEL Premium1.8LL4GASN/A
2015VolkswagenPassatSEL Premium3.6LV6GASN/A
2015VolkswagenPassatWolfsburg Edition1.8LL4GASN/A
2015VolkswagenPassatLimited Edition1.8LL4GASN/A
2015VolkswagenPassatSport1.8LL4GASN/A
2015VolkswagenPassatSE1.8LL4GASN/A
2015VolkswagenPassatS1.8LL4GASN/A
2014VolkswagenBeetleR-Line2.0LL4GASN/A
2014VolkswagenBeetleTDI2.0LL4DIESELN/A
2014VolkswagenBeetleGSR2.0LL4GASN/A
2014VolkswagenBeetleBase1.8LL4GASN/A
2014VolkswagenBeetleBase2.5LL5GASN/A
2014VolkswagenPassatSE3.6LV6GASN/A
2014VolkswagenPassatTDI SEL Premium2.0LL4DIESELN/A
2014VolkswagenPassatTDI SE2.0LL4DIESELN/A
2014VolkswagenPassatSEL Premium1.8LL4GASN/A
2014VolkswagenPassatSEL Premium3.6LV6GASN/A
2014VolkswagenPassatWolfsburg Edition1.8LL4GASN/A
2014VolkswagenPassatWolfsburg Edition2.5LL5GASN/A
2014VolkswagenPassatSE1.8LL4GASN/A
2014VolkswagenPassatSE2.5LL5GASN/A
2014VolkswagenPassatS1.8LL4GASN/A
2014VolkswagenPassatS2.5LL5GASN/A
2013VolkswagenBeetleR-Line2.0LL4GASN/A
2013VolkswagenBeetleTDI2.0LL4DIESELN/A
2013VolkswagenBeetleTurbo2.0LL4GASN/A
2013VolkswagenBeetleBase2.5LL5GASN/A
2013VolkswagenPassatTDI SE2.0LL4DIESELN/A
2013VolkswagenPassatWolfsburg Edition2.5LL5GASN/A
2013VolkswagenPassatSEL2.5LL5GASN/A
2013VolkswagenPassatSE3.6LV6GASN/A
2013VolkswagenPassatSE2.5LL5GASN/A
2013VolkswagenPassatS2.5LL5GASN/A
2013VolkswagenPassatSEL Premium3.6LV6GASN/A
2013VolkswagenPassatSEL Premium2.5LL5GASN/A
2013VolkswagenPassatTDI SEL2.0LL4DIESELN/A
2012VolkswagenBeetleTurbo2.0LL4GASN/A
2012VolkswagenBeetleBase2.5LL5GASN/A
2012VolkswagenPassatSEL Premium3.6LV6GASN/A
2012VolkswagenPassatTDI SEL2.0LL4DIESELN/A
2012VolkswagenPassatTDI SE2.0LL4DIESELN/A
2012VolkswagenPassatSEL Premium2.5LL5GASN/A
2012VolkswagenPassatSEL2.5LL5GASN/A
2012VolkswagenPassatSE3.6LV6GASN/A
2012VolkswagenPassatSE2.5LL5GASN/A
2012VolkswagenPassatS2.5LL5GASN/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:

561819031A561819031B561819031C98030

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

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