What's in the Nextbase install kit?
Wiring loom and 2 x piggy back fuse holders. For the Z3 you will need the one on the far right
Tools required
Trim removal tool
T25 torx wrench
Flat blade screwdriver
M10 spanner
This is a relatively easy job and can be completed in an hour, but it's wise to allow a couple of hours if you haven't worked on your car very often.
The kit allows for direct electrical connection into the cars fuse box which means you don't have to cut and splice any wires, it's all plug and play. Connection is to fuse number 21 which is the bottom fuse on the right hand side of the fuse box. It is 5 amp.
To get access to the fuse box from inside the car you will need to remove the side trim on the passenger side beneath the dash board
Then remove the trim from the left hand windscreen pillar
Then remove the passenger side sun visor
With the sun visor removed, just gently pry the upper trim away from the windscreen. You only need about 5mm of clearance to feed the cable behind so don't use a lot of force.
Working under the dash board with the trim removed, pull the carpet away from the front bulkhead so that you can see this grommet. I have gently pushed my screwdriver through it so that it is clear to see
View from the engine bay you need to remove this sound proof flap by removing the nut
This "flap" is just to the left of the fusebox on the bulkhead.
Remove the nut and pull the flap clear. Then you can see where the screwdriver comes through the grommet
Next step, from inside the car push the brown cable through into the engine bay. You need the end of the cable to reach the fusebox. When you've done that you can resecure the soundproof flap and refit the nut.
Back inside the car again now, you will see an earth connection on the left hand side.
Connect the black earth wire to this earth point
Next, feed the black cable that connects to the dash cam behind the trim above the windscreen and down the windscreen/door pillar. The cable will need to protrude about 100mm to 150mm, (4 to 6 inches in old money), to allow easy connection to the camera.
There is plenty of cable to route down the windscreen pillar
and then push the cable between the dashboard and door pillar
Gently pull the cable to remove the any slack. You can bunch the excess cable and tidy it up then conceal it behind the side trim under the dashboard.
Lower trim replaced. You can now replace the sun visor and secure the trim.
Finally, you need to complete the electrical connection.
Remove fuse number 21 and then install it into the piggy back fuse holder
Then install the piggy back fuse holder into fuse 21 position in fusebox
(This photo should be turned through 180 degrees, in other words it's upside down, but I didn't spot it when I downloaded it)
I had to snip away a bit of the wall of the fusebox in 2 places to allow the fuse holder to seat properly and to allow for connection to the cable from inside the car. Cutting the wall of the fusebox as I have demonstrated here will not affect the integrity of the fusebox.
(This photo is upside down too, but I'm sure it's still clear what I'm trying to explain)
Then connect the piggyback fuse holder to the wire from inside the car and the install is completed. Tidy the cable by taping or cable tie to the main loom.
Fit the lid back on the fusebox and the install is complete.
Wiring loom and 2 x piggy back fuse holders. For the Z3 you will need the one on the far right
Tools required
Trim removal tool
T25 torx wrench
Flat blade screwdriver
M10 spanner
This is a relatively easy job and can be completed in an hour, but it's wise to allow a couple of hours if you haven't worked on your car very often.
The kit allows for direct electrical connection into the cars fuse box which means you don't have to cut and splice any wires, it's all plug and play. Connection is to fuse number 21 which is the bottom fuse on the right hand side of the fuse box. It is 5 amp.
To get access to the fuse box from inside the car you will need to remove the side trim on the passenger side beneath the dash board
Then remove the trim from the left hand windscreen pillar
Then remove the passenger side sun visor
With the sun visor removed, just gently pry the upper trim away from the windscreen. You only need about 5mm of clearance to feed the cable behind so don't use a lot of force.
Working under the dash board with the trim removed, pull the carpet away from the front bulkhead so that you can see this grommet. I have gently pushed my screwdriver through it so that it is clear to see
View from the engine bay you need to remove this sound proof flap by removing the nut
This "flap" is just to the left of the fusebox on the bulkhead.
Remove the nut and pull the flap clear. Then you can see where the screwdriver comes through the grommet
Next step, from inside the car push the brown cable through into the engine bay. You need the end of the cable to reach the fusebox. When you've done that you can resecure the soundproof flap and refit the nut.
Back inside the car again now, you will see an earth connection on the left hand side.
Connect the black earth wire to this earth point
Next, feed the black cable that connects to the dash cam behind the trim above the windscreen and down the windscreen/door pillar. The cable will need to protrude about 100mm to 150mm, (4 to 6 inches in old money), to allow easy connection to the camera.
There is plenty of cable to route down the windscreen pillar
and then push the cable between the dashboard and door pillar
Gently pull the cable to remove the any slack. You can bunch the excess cable and tidy it up then conceal it behind the side trim under the dashboard.
Lower trim replaced. You can now replace the sun visor and secure the trim.
Finally, you need to complete the electrical connection.
Remove fuse number 21 and then install it into the piggy back fuse holder
Then install the piggy back fuse holder into fuse 21 position in fusebox
(This photo should be turned through 180 degrees, in other words it's upside down, but I didn't spot it when I downloaded it)
I had to snip away a bit of the wall of the fusebox in 2 places to allow the fuse holder to seat properly and to allow for connection to the cable from inside the car. Cutting the wall of the fusebox as I have demonstrated here will not affect the integrity of the fusebox.
(This photo is upside down too, but I'm sure it's still clear what I'm trying to explain)
Then connect the piggyback fuse holder to the wire from inside the car and the install is completed. Tidy the cable by taping or cable tie to the main loom.
Fit the lid back on the fusebox and the install is complete.
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Guess who got a Dash Cam for Xmas and was looking at how I was going to hard wire it in the Coupe instead of trailing wires to cig lighter point. Dash Cam is nothing fancy, a Nextbase 212, but seems to get quite reasonable reviews. 
