Continuous oscillation of the pressure regulator valve in Hyundai/Kia vehicles with A4CF1, A4CF2 transmissions cause valve body bore wear, resulting in line pressure irregularities and valve instability. The Sonnax pressure regulator valve kit 84741-03K fixes these issues by combining a sleeved balance spool to eliminate the wear preventing proper valve stroke, and a modified pressure regulator valve with lengthened spools to increase sealing contact and provide greater stability.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
A vacuum test at the ports indicated holds 18 in-Hg or more. If poor vacuum results are discovered at the OE pressure regulator valve, Sonnax PR valve kit [84741-01K] should be installed.