Models
2013-’16 TT
2015-’16 A3, Q3
Symptoms:
On the models listed, the all-wheel-drive does not work or the EPC warning light is illuminated. The technician will find there is an internal leak in the hydraulic pump.
Correction:
Replace the pump with the improved part OCQ598549, fill the fluid in the case and recalibrate the differential with a scan tool.
Courtesy of Mitchell 1.
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