Purpose of the System

The purpose of the RDW system is to warn drivers of potentially hazardous conditions caused by tire loss of air. Underinflation is a tire's #1 Enemy. It results in unnecessary tire stress, irregular wear, loss of control and accidents. A tire can lose up to half of its air pressure and not appear to be flat

Under inflated tires are major causes for blowouts. An under inflated tire runs hot due to the action of the tire as it rolls under the car. The sidewalls become squashed outward, and it is this movement that causes the tire to generate heat and fail.

The RDW system is not a substitute for regular checks of tire air pressure but rather a warning system for loss of air conditions that arise while driving.

The driver is responsible for ensuring that the tire pressure is set correctly. The system cannot perform a plausibility check on whether the tire pressure set is correct. It can only monitor the pressure set at the moment of initialization compared to the warning values stored in the control unit.

The correct cold pressure (= the normal pressure when the tire is cold) must be obtained from the owners handbook.