The brake light switch failing is a common problem but other things can cause the same symptoms. Makes sense to test your switch before blindly replacing it.
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Parasitic Electrical Drain
Battery going flat over a few days of the car not being used?
452 Roadster Passenger Air Bag
If you are changing the passenger airbag on the Roadster, it probably means that it has exploded. If it has, you'll also have to change the top dash pad. Luckily, they are connected. First thing first. Disconnect the battery and leave the key in the house. If you look...
451 Heater Fan Brushes
451 Heater Motor Brushes For some reason, it's mainly the American 451s that suffer with brush problems. Dunno why but it does affect non Americans as well. The standard brushes seem low quality and seem to wear very quickly. Probably because the commutator gets a...
451 Fortwo Speedo Cloning
Cloning The 451 Fortwo Speedo Cloning is a process where you take data from 1 item and copy it to another to make an exact replica. Why Would I Need To Do That? If your speedo has failed completely, has a hardware or PCB fault, you need to fit a new speedo. Can I Just...
450 Fortwo ECU Cloning
Cloning The 450 Fortwo ECU Cloning is a process where you take data from 1 item and copy it to another to make an exact replica. Why Would I Need To Do That? ECU's have been known to fail from water ingress, electrical damage from fitting the battery the wrong way...
SAM Unit Clean
If your car electrics are being strange, your SAM could be wet and damaged. Cleaning the PCB can fix it.
454 Forfour Speedo Cloning
Cloning The 454 Forfour Speedo Cloning is a process where you take data from 1 item and copy it to another to make an exact replica. Why Would I Need To Do That? If your speedo has failed completely, has a hardware or PCB fault, you need to fit a new speedo. Can I...
450 Fortwo Speedo Cloning
Cloning The Fortwo Speedo Cloning is a process where you take data from 1 item and copy it to another to make an exact replica. Why Would I Need To Do That? If your speedo has failed completely, has a hardware or PCB fault, you need to fit a new speedo. Can I Just Fit...
Hella 451 DRL Repair
The 5 per side Hella daytime running lights on the 451 where surprisingly poor quality and failed regularly.
451 DRL Options
Pre-Facelift DRLs The first type of daytime running lights available for the 451 was this type. They consist of a pair of Hella lights and surrounds. Smart part number A 451 820 00 61. However, if you buy them from smart, they'll be ridiculously expensive. So, do a...
Roadster Indicator Faults
Roadster Indicator Faults It's surprisingly normal to hear Roadster owners come up against a strange issue along the lines of: 1 or both indicators come on and stay on when I indicate. 1 or both indicators come on and stay on when I turn the car on. 1 or both sides...
HID Headlight Interference
Radio Interference After HID Installation This is a fairly normal occurrence. The radio signal is fine until you turn on the headlights. But as soon as the headlights are on, you get loads of static interference over the music. What Is It? Radio stations are...
Fitting A Better Horn
The Horn The standard horn fitted to all smarts isn't loud enough. It doesn't draw attention like it should. In fact, it's almost laughable and many people say it's like a scooter horn. There's a reason for that. That's exactly what it is. A single low wattage disc...
Roadster Rear Light Faults
The biggest cause of rear lights not working on the Roadster is water damage and corrosion (surprise surprise). So, if a bulb isn't working, obviously 1st check that the bulb filament(s) are ok. Also check to make sure they are fitted correctly. Remove the bulb that...
Wishbone Change 451
If you have bent a wishbone in a crash or the bushes are failing, fit a new wishbone.
Wishbone Change Roadster
Hit something or had a little crash and bent the wishbone?
Roadster Alloys On A Fortwo 450
This question seems to be coming up a lot now by people wanting wider wheels but not wanting to pay silly money for 3rd party alloys.
Fitting New Reluctors
How to fit reluctor ABS rings both ways
Roadster Rear Bearings
Loosen the wheel bolts, jack the car up and remove the wheel. Use a Torx30 to remove the drum fixing. Release the handbrake and pull the drum from the hub. With the car in reverse the driveshafts are locked. Use a 21mm socket to remove the centre bolt. You'll need a...