2021 JEEP WRANGLER 4XE Owners Manual

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To avoid DEF spillage, and possible damage to 
the DEF tank from overfilling, do not “top off” 
the DEF tank after filling.
DO NOT OVERFILL. DEF will freeze below 12ºF 
(-1

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JEEP WRANGLER 4XE 2021  Owners Manual 4

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Do not connect trailer brakes to your vehicle's 
hydraulic brake lines. It can overload your 
brake system and cause it to fail. You might 
not have brakes whe