Toyota LEXUS LS430 2005 Manual page 407

DRIVING TIPS
Hitches
D If you wish to install a trailer hitch, your Lexus dealer should
be consulted.
D Use only a hitch which is recommended by Lexus dealer
and conforms to the total trailer weight requirement.
D Follow the directions supplied by the hitch manufacturer.
Lubricate the hitch ball with a light coat of grease.
D Lexus recommends removing the trailer hitch whenever
you are not towing a trailer to reduce the possibility of
additional damage caused by the hitch if your vehicle is
struck from behind. After removing the hitch, seal any
mounting holes in the vehicle body to prevent entry of
pollutants such as exhaust fumes, dirt, water, etc.
NOTICE
D Install the trailer hitch using only the position
recommended by your Lexus dealer. Do not install
the trailer hitch on the bumper; this may cause body
damage.
D Do not use axle−mounted hitches as they can cause
damage to the axle housing, wheel bearings, wheels
or tires.
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Brakes and safety chains
D Lexus recommends trailers with brakes that conform to
any applicable federal and state/provincial regulations.
D A safety chain must always be used between the towing
vehicle and the trailer. Leave sufficient slack in the
chain for turns. The chain should cross under the
trailer tongue to prevent the tongue from dropping to
the ground in case it becomes damaged or separated.
For correct safety chain procedures, follow the hitch or
trailer manufacturer's recommendations.
CAUTION
D If the total trailer weight exceeds 450 kg (1000 lb.),
trailer brakes are required.
D Never tap into your vehicle's hydraulic system as it
will lower its braking effectiveness.
D Never tow a trailer without using a safety chain
securely attached to both the trailer and the vehicle.
If damage occurs to the coupling unit or hitch ball,
there is possible danger of the trailer wandering over
into another lane.