Installation Guide
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MetraOnline.com © COPYRIGHT 2021 METRA ELECTRONICS CORPORATION REV. 4/20/21 INST99-7821B
INSTALLATION INSTRUCTIONS
99-7821B
Attention! Let the vehicle sit with the key
out of the ignition for a few minutes before
removing the factory radio. When testing the
aftermarket equipment, ensure that all factory
equipment is connected before cycling the
key to ignition.
KIT FEATURES
KIT COMPONENTS
• A) Radio trim panel • B) Radio brackets • C) Pocket • D) (4) #8 x 3/8” Phillips screws • E) (8) Plastic panel clips
• F) Axxess wiring harness and interface (not shown) • G) Antenna adapter (not shown)
TOOLS REQUIRED
• Panel removal tool • Phillips screwdriver
TABLE OF CONTENTS
Dash Disassembly ..................................................2
Kit Preparation .......................................................3
Kit Assembly
–ISO DIN radio provision with pocket ..................4
–ISO DDIN radio provision .....................................4
Axxess Interface Installation ............................5-14
Final Assembly ......................................................15
WIRING & ANTENNA CONNECTIONS
Wiring Harness: Included in kit
Antenna Adapter: Included in kit
A B C D E
Honda Civic (Excluding LX models) 2016-2021
Visit MetraOnline.com for more detailed information about the product and up-to-date vehicle
specific applications. Note: Additional parts required to retain factory amplifier.
• ISO DIN radio provision with pocket
• ISO DDIN radio provision
• Painted matte black
• Touchscreen display for climate and
personalization features
• Retains the factory backup camera
and LaneWatch camera
• Retains audio controls on the steering wheel
• Provides NAV outputs (parking brake,
reverse, speed sense)
• Additional purchase of AXSP-HN is required
to retain factory amplifier. Identifiable
when equipped with factory sub-woofer
or center channel speakers.