EnTire Solutions will increase its direct tyre pressure monitoring (TPM) system presence in North America as the direct TPM system supplier for the 2007 Toyota Sienna.

"EnTire Solutions, a joint venture company formed by TRW Automotive and Michelin, is pleased to count Toyota as one of its customers," said chief executive officer Rich Wolfe.

The company launched its first TPM system as standard equipment on the 2004 Acura MDX and currently supplies Honda, Hyundai, Kia and Fiat.

The direct TPM system employs a battery-powered pressure sensor mounted on the valve stem inside the wheel. The sensor sends tyre pressure and temperature information to a vehicle-mounted receiver via a radio signal. Two versions of the system are made: a basic and an enhanced system.