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What's Inside: Tire Pressure Monitoring System (TPMS)
 

More than half the vehicles on the road today have at least one significantly under-inflated tire which impacts vehicle safety and durability.

 

 

Recommended Tire Pressure


The low and minimum pressure levels used by the Subaru TPMS are lower than the recommended cold-tire pressure for original-equipment tires. When not towing, recommended pressures are 32 psi front and 30 psi rear. Subaru lists recommended tire pressures in the Owner’s Manual (2005 Legacy – Maintenance and Service section, page 50) and on placards fixed to driver’s-side door pillars.

 

Future governmental regulations may call for new vehicles to have tire pressure monitoring systems (TPMS) to warn of low tire pressure. As one of its safety initiatives, Subaru already installs TPMS on these 2005 Outback models:

 

  • Sedan 3.0 R
  • Wagon 3.0 R L.L.Bean®
  • Wagon 3.0 R VDC Limited

 

Other models will follow.

 

What TPMS Does

 

TPMS is intended to alert the driver if tire pressure in one or more tires falls below a preset value. A drop in tire pressure could result from:

  • A puncture caused by a nail or other foreign object
  • A poor seal between the tire and wheel
  • The need for routine tire maintenance
  • Changes in ambient temperature

 

Subaru TPMS is designed to illuminate a warning light if air pressure in any tire drops between 26 and 27 pounds per square inch (psi). When all tires are above a minimum pressure of 29 psi, the warning light is off.

 

 

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