Mod Description
How to change the 2 interior courtesy light bulbsMod Details
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Rear Interior Forfour Bulb Change
Insert a thin blade screwdriver between the back of the light unit and the roof. Prise the unit out.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint1.jpg)
Disconnect the electrical connector.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint2.jpg)
On the end you can see a tab that holds the lens cover in place.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint3.jpg)
Insert your thin blade screwdriver and push the lens cover out.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint4.jpg)
The rear light unit will now be in 2 pieces. The 36mm festoon bulb (12V 7W) is just pulled out.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint5.jpg)
Replace with the same type or go for a festoon LED replacement (it’ll only work 1 way round).
Front Interior Forfour Bulb Change
Using a thin blade screwdriver, lever the light unit out of the surround from the back of the unit.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint6.jpg)
There is a sprung metal clip at the back (lowest in the picture) and clips at the front.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint7.jpg)
Disconnect the power connector.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint8.jpg)
There are now 5 clips that need to be released. There is 1 each end that can be unclipped with your fingers.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint9.jpg)
At the front edge you can use your thin blade screwdriver on the single clip…
![](/wp-content/uploads/smartlights/courtesy/454/forfourint10.jpg)
…and the 2 clips on the back edge.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint11.jpg)
With those pushed in, the diffuser will be released and the unit will open. The bulb is visible and can be pulled easily from its holder. It is a 12V, 10W halogen pill bulb. Bulb type 433B, BA9S style. There are no LED replacements.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint12.jpg)
The internals of the front light show how the light from a single bulb can be directed simply by twisting the central part of the courtesy light. Applying silver foil on the inside of this tube could increase light output.
![](/wp-content/uploads/smartlights/courtesy/454/forfourint13.jpg)
Refitting is the reverse of removal.