Tire pressure warning system
Frequently asked questions

Frequently asked questions about DUNLOP TECH Warnair

Question: How many systems of DUNLOP TECH Warnair are there in use?
Answer: By the end of 2012 it was used in more than 10.5 Mill. vehicles worldwide.

Q: Why are tire pressure monitoring systems so valuable for motorists?
A: In 2007, according to Germany’s Federal Statistical Office, 1,213 accidents involving personal injury were caused by technical defects of the tires. In 2011 there were 985. Such decline by 20% is largely attributable to the increase in tire pressure monitoring systems (especially indirectly measuring systems) being fitted as standard in recent years.
Q: Can DUNLOP TECH Warnair be used in trucks or buses, likewise?
A: Second-generation Warnair can be applied in vehicles of the categories M1 and N1 (passenger cars and light commercial vehicles).
Q: Does DUNLOP TECH Warnair also work if tyres of different type, age or condition are used?
A: Once the learning phase has been successfully accomplished, DUNLOP TECH Warnair works properly under such different conditions, too.
Q: Does the North American TREAD-ACT regulation (FMVSS138) stipulate whether the tyre pressure monitoring system has to be direct or indirect?
A: No, it only requires the existence of a suitable system.

Q: Does the European ECE-R64 regulation stipulate whether the tyre pressure monitoring system has to be direct or indirect?
A: No, it only requires the existence of a suitable system.

Q: Can DUNLOP TECH Warnair detect a simultaneous loss in pressure of all four tyres?
A: Yes, it can. Warnair of the latest generation can do so by means of a spectral analysis of the tyre properties. Evidence of compliance with the legal requirements regarding diffusion detection has been provided both under North American and European test conditions.
Q: Can the system be used with run-flat tyres?
A: Yes, it can. For more information about run-flat tyres please visit www.dunlop.eu.
Q: Where can I buy DUNLOP TECH Warnair?
A: DUNLOP TECH Warnair is available as a part of the original equipment. A retrofit installation into a vehicle is not yet possible.
Q: What are the costs of DUNLOP TECH Warnair?
A: In many cases it is a standard component of the vehicle equipment, albeit sometimes for a small additional charge. The tyre pressure monitoring systems of the new generation (in conformity with the law acc. ECE R64 or FMVSS138, respectively) are standard equipment of the vehicle.  
Q: Are there any consequential costs involved with the operation of DUNLOP TECH Warnair?
A: No, there are not. The customer can enjoy a system that causes no further costs over the entire lifespan of his vehicle.

Q: What must be considered when changing a tyre?
A: Once the tyre has been changed, the correct air pressure must be set as well as Warnair put into the learning phase. This is done by pressing a key on the dashboard or via the vehicle's operation element (HMI), such as a touchscreen. As soon as the vehicle is in motion, Warnair starts learning the parameters of the new tyre set independently and, thereupon, monitors the correct filling pressure.

Q: Can DUNLOP TECH Warnair ever break down?
A: Warnair is integrated in ABS and ESP systems, respectively. The high reliability of these systems makes the occurrence of a breakdown of Warnair extremely improbable.

Q: Can a motorist continue his journey once a loss in tyre pressure has been indicated?
A: Provided that the motorist has a tyre sealant - such as IMS (Instant Mobility System) - on board, he may continue his journey in the majority of cases until there is an opportunity to have the tyre checked by a specialist. If he has run-flat tyres fitted to his vehicle, he may - in principle - drive home again or to a suitable tyre dealer to have the tyre replaced. In the vast majority of cases mobility will be maintained, therefore.

Q: If the warning performance of indirect measuring systems is as good as that of those measuring directly, and so at incomparably more favourable prices, why are the expensive direct measuring systems still on the market?
A: Some customers wish to have the tyre pressure value indicated on the dashboard or that tyre pressure monitoring is effected by the system even when the vehicle is stationary, neither of which comfort features is fulfilled by an indirect system.

Q: Which of the systems is more reliable in practice?
A: Under normal conditions, both systems function well. Directly measuring systems, however, need many mechanical/movable parts which must be replaced in case of wear and, hence, limit reliability.

If you wish to have any further information, please use the contact data as displayed in the box on the right.

Your DUNLOP TECH Warnair Team

Tire pressure warning system





Warnair system

is an integral part

of selected Bosch

ABS and ESP systems.



Visit us at:

Offenbacher Landstraße 8
63456 Hanau


Telefon: +49 (0) 6181 / 9394 0