Vanagon engine fitment codes and year range:

KY, 1.7 Diesel 08/84-07/92

JX, 1.6 Turbo Diesel 08/84-07/92
CS, 1.6 Diesel 07/85-07/87

Please check the condition of your wiring - most reported faults in new starter operation are due to old wiring from the ignition switch producing low voltage at the starter motor solenoid. You can check if non-operation is due to a wiring issue by testing with a feed direct from the battery. If in doubt then seek professional advice.