Damage

Damage  - Tire care - Tires, Wheels and Loading - Lincoln MKZ Owners Manual - Lincoln MKZ

Periodically inspect the tire treads and sidewalls for damage (such as bulges in the tread or sidewalls, cracks in the tread groove and separation in the tread or sidewall). If damage is observed or suspected have the tire inspected by a tire professional. Tires can be damaged during off-road use, so inspection after off-road use is also recommended.

WARNING: Age.
Tires degrade over time depending on many factors such as weather, storage conditions, and conditions of use (load, speed, inflation pressure, etc.) the tires experience throughout their lives.
In general, tires should be replaced after six years regardless of tread wear. However, heat caused by hot climates or frequent high loading conditions can accelerate the aging process and may require tires to be replaced more frequently.
You should replace your spare tire when you replace the road tires or after six years due to aging even if it has not been used.

    See also:

    Location of the tire label
    You will find a Tire Label containing tire inflation pressure by tire size and other important information located on the B-Pillar or the edge of the driver’s door. Refer to the payload descriptio ...

    Away from home
    If you are away from home when your vehicle needs service, contact the Ford Customer Relationship Center or use the online resources listed below to find the nearest authorized dealer. In the U ...

    If your vehicle gets stuck in mud or snow
    Note: Do not rock the vehicle if the engine is not at normal operating temperature or damage to the transmission may occur. Note: Do not rock the vehicle for more than a minute or damage to the ...