Lexus GX 460 2020 Owner's Manual page 398

WARNING
Handling the radar sensor
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One Blind Spot Monitor sensor is installed inside the left and right side of the vehicle
rear bumper respectively. Observe the following to ensure the Blind Spot Monitor can
function correctly.
Keep the sensor and its surrounding area on
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the bumper clean at all times.
Do not subject the sensor or surrounding area on the bumper to a strong impact. If
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the sensor moves even slightly off position, the system may malfunction and vehicles
that enter the detection area may not be detected. If the sensor or surrounding area is
subject to a strong impact, always have the area inspected by your Lexus dealer.
Do not disassemble the sensor.
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Do not attach accessories or stickers to the sensor or surrounding area on the
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bumper.
Do not modify the sensor or surrounding area on the bumper.
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Do not paint the rear bumper any color other than an official Lexus color.
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If the sensor needs to be replaced, contact your Lexus dealer.
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GX460_OM_OM60R28E_(GE)
4-5. Using the driving support systems
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