Metra Electronics 99-8100 User Manual
Page 5

7
4
Disconnect the negative battery terminal to 
prevent an accidental short circuit. Remove 
(1) screw to the right of the ignition switch. 
Remove (1) screw above the left speaker. 
Unclip the dash trim bezel (some force may 
be required). Remove the screws securing 
the factory head unit and disconnect the 
wiring.
1
TOYOTA Corolla (sed/wag-lower dash) 1988-93
2
Slide Mounting Tabs #3 into slots "F" on 
Bracket Set #2. The Mounting Tabs, 
Brackets and Bracket slots can be identified 
by the stamped letter on each component. 
Skip to the Installation Instructions for ALL 
VEHICLES on Page #10.
Disconnect the negative battery terminal to 
prevent an accidental short circuit. Remove 
(2) Phillips screws above the climate 
controls. Unclip the lower edge of the radio 
trim bezel and remove. Remove the screws 
securing the factory head unit and 
disconnect the wiring. 
1
TOYOTA MR2 1985-86
2
Slide Mounting Tabs #3 into slots "C" on 
Bracket Set #12. The Mounting Tabs, 
Brackets and Bracket slots can be identified 
by the stamped letter on each component. 
Skip to the Installation Instructions for ALL 
VEHICLES on Page #10.
Disconnect the negative battery terminal to 
prevent an accidental short circuit. Remove 
(2) screws from the top of the dash trim bezel 
and remove the bezel. Remove (4) screws 
from the factory head unit (or coin tray 
dummy panel) and disconnect the wiring.
1
TOYOTA MR2 1987-90
2
Slide Mounting Tabs #3 into slots "I" on 
Bracket Set #12. The Mounting Tabs, 
Brackets and Bracket slots can be identified 
by the stamped letter on each component. 
Skip to the Installation Instructions for ALL 
VEHICLES on Page #10.
Disconnect the negative battery terminal to 
prevent an accidental short circuit. Remove 
(2) Phillips screws from each side of the 
radio trim bezel. Remove the bezel. 
Remove (4) screws securing the factory 
head unit and disconnect the wiring.
1
TOYOTA Corolla 1984-87
2
2DR/3DR MODELS: Slide Mounting Tabs 
#3 into slots "G" on Bracket Set #1. (see Fig. 
A). 
4DR/5DR MODELS: Slide Mounting Tabs 
#3 into slots "F" on Bracket Set #1. (see Fig. 
B). 
The Mounting Tabs, Brackets and Bracket 
slots can be identified by the stamped letter 
on each component. Skip to the Installation 
Instructions for ALL VEHICLES on Page #10.
"C"
"C"
"I"
"I"
Fig. A
Fig. B
"F"
"F"
"F"
"F"
"G"
"G"
