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Spectra 99373 HVAC Heater CoreOE Quality 60-Day Returns
Part #: 99373

Spectra 99373 HVAC Heater Core

28 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Audi, A4, A4 Quattro, RS4, and S4
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Spectra 99373 HVAC Heater Core

The Spectra 99373 HVAC heater core is a direct-fit replacement for select Audi heating systems. It is built to match original equipment performance targets for heat transfer and cabin comfort in Audi A4, A4 Quattro, S4, and RS4 applications.

Key Features

  • OE-style HVAC heater core for factory-style fitment
  • Engineered to meet or exceed original equipment performance expectations
  • Supports consistent cabin heat output in cold-weather driving
  • Fits 2002-2012 Audi A4 Quattro, 2002-2010 Audi A4, 2004-2009 Audi S4, and 2007-2008 Audi RS4
  • Part number 99373 for easy identification and cross-reference

Detailed Description

Built for Audi heating and climate control systems, Spectra 99373 is a replacement heater core for vehicles that need restored heat output and dependable coolant-to-air heat exchange. This part is a practical choice for Audi A4 heater core replacement, Audi A4 Quattro heater core replacement, and Audi S4 or RS4 HVAC service where the original core has restricted flow, leakage, or reduced heating performance. The 99373 heater core is also cross-referenced with Dorman - HELP 91003 and Focus Auto Parts 92003 for the same application.

What It Helps Fix

  • Weak or uneven cabin heat
  • Coolant odor inside the vehicle
  • Fogging caused by poor heater performance
  • Heat loss from a leaking or restricted heater core
  • HVAC performance issues in Audi A4, A4 Quattro, S4, and RS4 models

Installation Notes and Tips

Verify vehicle year, model, and HVAC configuration before installation. Heater core replacement on Audi A4 and related models often requires access through the HVAC case, so inspect hoses, seals, and surrounding components during service. Flush the cooling system if contamination or debris is present before installing the new core.

Quality Assurance

Spectra Premium states that its HVAC heater cores are manufactured with engineering controls, production technology, and quality checks intended to meet or exceed the performance of the original equipment they replace.

This part fits 28 vehicles. Search below:

YearMakeModelPositionNotes
2012AudiA4 QuattroN/A
2011AudiA4 QuattroN/A
2010AudiA4N/A
2010AudiA4 QuattroN/A
2009AudiA4N/A
2009AudiA4 QuattroN/A
2009AudiS4N/A
2008AudiA4N/A
2008AudiA4 QuattroN/A
2008AudiRS4N/A
2008AudiS4N/A
2007AudiA4N/A
2007AudiA4 QuattroN/A
2007AudiRS4N/A
2007AudiS4N/A
2006AudiA4N/A
2006AudiA4 QuattroN/A
2006AudiS4N/A
2005AudiA4N/A
2005AudiA4 QuattroN/A
2005AudiS4N/A
2004AudiA4N/A
2004AudiA4 QuattroN/A
2004AudiS4N/A
2003AudiA4N/A
2003AudiA4 QuattroN/A
2002AudiA4N/A
2002AudiA4 QuattroN/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:

39993680668E1820031910039200399373HT2179HT2179CHTR010581

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

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