See also:

Tire age
Tires degrade over time, even when they are not being used. It is recommended that tires generally be replaced after 6 years of normal service. Heat caused by hot climates, frequent high loading c ...

Quality and equipment
In the Volvo XC90 considerable importance has been attached to providing a comprehensive standard specification to reflect the upmarket ambience of the car itself. Luxurious touches such as the ...

Heated oxygen sensors
The heated oxygen sensors monitor the oxygen content of the exhaust gases. Readings are fed into a control module that continuously monitors engine functions and controls fuel injection. The r ...