EXTERIOR: Smoothed front bumper, washer jet delete, splitter blended in, front wings widened 15mm, de-locked, repeaters removed, Mk6 GTI mirrors, smoothed rear bumper with shortened plate recess, R32 LED tail lights, de-wipered/badged tailgate, US grille with plate delete, Lambo filler cap. Symptoms of a failing Mk5 VW GTI oil filter housing: Oil leak around the front of the engine The oil filter housing is a common leak point on this series of VW engines.You need to understand what these symptoms are if you are going to tell the difference between the two possible problems. Golf gti mk5 pcv symptoms Now i have engine mulfunction light with the computer indicating speed sensor problem.