Antilock Brakes / Traction Control Systems: Application and ID

ABS 5.3i vs. ABS 5.3

You can identify ABS 5.3i by observing the mounting angle of the hydraulic control unit. It will appear be mounted on its side rather than upright as compared to ABS 5.3 hydraulic control unit.
Permanent production installation of ABS 5.3i will begin with vehicle identification number 315677.