Tire pressure warning system
About the Warnair system

About the DUNLOP TECH Warnair system

DUNLOP TECH Warnair is an integral part of ABS/ESP systems
The DUNLOP TECH Warnair System is an integrated component of selected BOSCH ABS and ESP systems. Through co-operation with BOSCH, WARNAIR - warning, on a software basis, against pressure loss in tires - has reinforced its market-leading position. The system was first launched on the European market in 2003 when used in the BMW 5 series (E60) as a component of the DSC (Dynamic Stability Control).

The principle of DUNLOP TECH Warnair is based on the fact that decreasing air pressure inside the tire lowers the dynamic rolling circumference of the wheel and, therefore, can be measured directly. The system monitors the tire pressure by continuous comparison of the rolling circumferences of all four wheels. This is achieved by the ABS impulse pick-up sensor transmitting the wheel rotational speed to the evaluation software.

Second-generation Warnair (DDWS) uses - beside the evaluation of the rolling circumference - further possibilities for the detection of changes in tire characteristics as they occur when the tire is losing air. For instance, a frequency analysis of the tires is carried out while in transit. This allows for the detection of any losses in tire pressure and other changes in the condition of the tire.

DUNLOP TECH GmbH Hanau takes over application for European models. The WARNAIR-Software is integrated in the ABS/ESP control unit. While BOSCH is responsible for the production and adjustment of the ABS/ESP components, DUNLOP TECH takes care of the application of the WARNAIR functions in vehicles manufactured in Europe. In the USA this task is assumed by Sumitomo Rubber Industries Automotive Technology (SRIAT) and in the Asian market by patent owner Sumitomo Rubber Industries Ltd. (SRI).

About the DUNLOP TECH Warnair system

The co-operation of BOSCH and Sumitomo Rubber Industries / DUNLOP TECH GmbH has met with a large and positive interest among automotive manufacturers worldwide. Just like the BOSCH ABS/ESP, WARNAIR has regularly proved  to be  the technically best system. The integration of tire pressure monitoring can be seen in line with the development of traction and stability systems such as ASR, ASC, ESP, or DSC. Automotive manufacturers, therefore, have a sophisticated and particularly cost-efficient system at their disposal. The specifications for tire pressure monitoring systems for passenger cars and light utility vehicles in Europe as required by legislation from 2011 on are complied with.

The combination of ESC/WARNAIR is particularly suitable for the increasing number of vehicles that no longer have a spare wheel. Even in case of a slight loss in pressure the driver is warned and may use the tire sealant (normally part of the vehicle’s equipment) at an early stage to avoid excessive tire wear. With these systems, too, DUNLOP TECH, with the TYREFIT pack, is the leader on the market.

A deflation warning system is mandatory with the so-called run-flat tires (such as RunOnFlat by Goodyear-Dunlop) which can be driven even in the event of a total deflation and whose defect is not immediately apparent, especially to less experienced motorists.


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Tire pressure warning system





Warnair system

is an integral part

of selected Bosch

ABS and ESP systems.