Mazda CX-9 2019 Owner's Manual page 154

Before Driving
Towing
Make sure there are no exhaust gas leaks into the passenger compartment if any mounting
bolts are connected to the body:
Modifying your vehicle exhaust system is dangerous. Exhaust gas entering the vehicle could
cause loss of consciousness or even death.
When mounting the trailer hitch, make no modifications to the vehicle exhaust system.
CAUTION
Make all hitch adjustments with actual loads. Do not load and unload vehicle while
adjusting hitch. This action will change the vehicle height.
Do not use an axle-mounted hitch. This may damage the axle and related parts.
▼ Tires
When towing a trailer, make sure all tires are inflated to the recommended cold-tire
pressure, as indicated on the tire pressure chart on the driver's door frame. Trailer tire size,
load rating, and inflation pressures should conform to tire manufacturer specifications.
WARNING
Never use the temporary spare tire when towing:
Using the temporary spare tire on your vehicle when towing a trailer is dangerous as it could
result in tire failure, loss of control, and injury to vehicle occupants.
▼ Safety Chains
Safety chains must be used as a precautionary measure should the trailer become
unintentionally unhitched. They should cross under the trailer tongue and attach to the hitch.
Leave enough slack to allow full turns. Consult literature published by your trailer or hitch
manufacturer for more details.
WARNING
Make sure the safety chain is securely attached to both the trailer and the vehicle prior to
departure:
Towing a trailer without using a safety chain securely attached to both the trailer and the
vehicle is dangerous. If damage occurs to the coupling unit or hitch ball, the trailer could
wander into another lane and cause a collision.
▼ Trailer Lights
Trailer lights must comply with all federal, state, and local regulations. Equip your trailer as
required before towing it day or night.
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