In VW/Audi 01J transmissions, the VSTV valve is the regulator to both N88 shift pressure and the N215 line pressure control solenoids. As the bore wears, solenoid output will not react according to the control module requirements, eventually setting adaption limit codes. Sonnax oversized VSTV pilot pressure valve 33741B-06 allows the bore to be refurbished and restores the hydraulic integrity of the circuit for proper modulated VSTV pilot pressure. Hardcoat anodized aluminum valve combats premature wear

Note:
For 01T applications, use 33741B-07. See casting comparison illustration to correctly identify unit being worked on.