Upgraded Pressure Relief Valve for Haldex

The APR Stage 2 Spring Upgrade for Haldex is the hardware component that unlocks the full potential of APR’s AWD controller calibration for Gen 5 Haldex. Engineered as a direct replacement for the factory clutch pressure relief spring, this precision-calibrated upgrade enables significantly higher achievable clamping pressures under increased torque demand while maintaining OEM-level drivability and system integrity. When paired with APR Stage 2 software for Haldex, the upgraded spring supports dramatically increased clutch pressure during high-load conditions, improving torque transfer to the rear axle and delivering faster, more consistent AWD engagement during aggressive launches and performance driving. The result is improved traction, stronger launches, and enhanced confidence when putting power to the pavement. Unlike spring-only solutions that require disassembling and modifying the factory valve assembly, the APR Stage 2 hardware is engineered as a simple, direct replacement component minimizing installation complexity while preserving factory safeguards and control architecture. Designed to work seamlessly within the OEM Haldex control strategy, the APR Stage 2 Spring Upgrade completes a fully integrated drivetrain performance solution allowing increased torque capability without compromising daily drivability or long-term reliability.

Specifications:

Emission Code	4
SDR Required Flag	N
Warranty Special	Warranted to be free from defects in the materials and workmanship prior to installation
Warranty Special UOM	TX
Country of Origin (Primary)	US
Harmonized Tariff Code (HTS)	8708505110
Life Cycle Status Code	2
National Popularity Code	A
Maximum Cases per Pallet Layer	12
Pallet Layer Maximum	4
Product Condition	NEW
ECCN	EAR99
Brand	APR
Category	Driveline and Axles
Emission Code	6
part type	AWD Coupling Unit
Sub Category	Differential
Warning	California Proposition 65
Description_SHO	Stage 2 for Haldex
Description_INV	HALDEX STAGE 2 SPRING
Description_DES	APR Stage 2 Spring for Gen 5 Haldex
Description_EXT	Upgraded Pressure Relief Valve for Haldex
Description_MKT	The APR Stage 2 Spring Upgrade for Haldex is the hardware component that unlocks the full potential of APR’s AWD controller calibration for Gen 5 Haldex. Engineered as a direct replacement for the factory clutch pressure relief spring, this precision-calibrated upgrade enables significantly higher achievable clamping pressures under increased torque demand while maintaining OEM-level drivability and system integrity. When paired with APR Stage 2 software for Haldex, the upgraded spring supports dramatically increased clutch pressure during high-load conditions, improving torque transfer to the rear axle and delivering faster, more consistent AWD engagement during aggressive launches and performance driving. The result is improved traction, stronger launches, and enhanced confidence when putting power to the pavement. Unlike spring-only solutions that require disassembling and modifying the factory valve assembly, the APR Stage 2 hardware is engineered as a simple, direct replacement component minimizing installation complexity while preserving factory safeguards and control architecture. Designed to work seamlessly within the OEM Haldex control strategy, the APR Stage 2 Spring Upgrade completes a fully integrated drivetrain performance solution allowing increased torque capability without compromising daily drivability or long-term reliability.
Description_FAB	APR Stage 2 Spring Upgrade for Haldex is supplied as a fully assembled, direct replacement part.
Description_FAB	Our instrumented Haldex unit achieved 22+ Bar clutch pressure increase over Stage 1 & nearly 30 Bar over stock
Description_FAB	Increased pressure means an increase in torque capacity transferrable through the Haldex unit
Description_FAB	Stage 2 requires only a simple spring change & software flash!
Description_FAB	APR recommends the proper APR Service Kit for Haldex when installing spring upgrade

This Part Fits:

Year	Make	Model	Submodel	Notes
2017	Audi	RS3
2018	Audi	RS3
2019	Audi	RS3
2014	Audi	TTS Quattro
2015	Audi	TTS Quattro
2016	Audi	TTS Quattro
2017	Audi	TTS Quattro
2018	Audi	TTS Quattro
2019	Audi	TTS Quattro
2018	Seat	Arona
2019	Seat	Arona
2017	Seat	Ateca
2018	Seat	Ateca
2019	Seat	Ateca
2012	Seat	Leon
2013	Seat	Leon
2014	Seat	Leon
2015	Seat	Leon
2016	Seat	Leon
2017	Seat	Leon
2018	Seat	Leon
2019	Seat	Leon
2019	Volkswagen	Arteon
2015	Volkswagen	Passat
2016	Volkswagen	Passat
2017	Volkswagen	Passat
2018	Volkswagen	Passat
2019	Volkswagen	Passat
2015	Volkswagen	Tiguan
2016	Volkswagen	Tiguan