All of a sudden in 2023 I started getting a lot of people asking about the location of the SRS airbag controller in the Roadster. So there must be a new common issue, either regarding water ingress or lead free solder faults. So I figured I'd do a page to show where...
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Kane Harrison
Roadster Airbag Controller Pin Out
Roadster Airbag Controller Pin Out Air Bag Controller Wire Colour Connection Function 1 Brown/Yellow Passenger Seatbelt Pin 1 Seatbelt Squib 2 Blue/Yellow Passenger Seatbelt Pin 2 Seatbelt Squib 3 Blue Driver Seatbelt Pin 1 Seatbelt Squib 4 Brown Driver Seatbelt Pin 2...
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.
Roadster Alloys On A Fortwo 451
Fitting Roadster Alloys On A 451 OK, the important part 1st. You CANNOT just get a set of alloys from a Roadster and fit them to your 451. Why Not? The offset of the rear alloys would make them hang out of the rear arches by up to 2 inches. What Can I Do? You...
Roadster Alternator Change
Get The Right Alternator When I initially fitted a replacement alternator to my Roadster it didn't actually work. I thought I had misdiagnosed the fault but actually I had been sold the wrong alternator for my car. On the smart there seems to be 6 different...
Roadster Belt Change
This page covers the AC belt and alternator/water pump belt. Air Conditioning Belt Look at the right hand side of the engine. It's not easy to see. Find the tensioner pulley wheel. Use a Torx45 bit to loosen the screw arrowed in the photo below. Push the pulley wheel...
Roadster Bonnet Cable
This page will show you have to fix a broken bonnet cable for cheap using better quality parts. If your cable has snapped, you'll have to force the bonnet open. They almost always snap at the bonnet catch. Remove The Lever Here is the lever that opens the bonnet, it's...
Roadster Bonnet Removal
Remove the bonnet so you can get the scuttle panel off to waterproof the wiper bucket or change the wiper motor
Roadster Boot Catch Fault
If your Roadster boot doesn't open from the switch or the key, you may have a faulty earth. It's a fairly common issue on the Roadster model. Firstly, make sure that all of the doors are closed and then try to lock the car with the key. If the car locks and then...
Roadster Boot Catch Removal
The Roadster Boot Won't Open Although likely, it doesn't necessarily mean that the boot catch solenoid is faulty. It could also be a blown fuse, faulty wire, key out of sync or a faulty boot release button. Ideally you should test it before blindly replacing it and...
Roadster Boot Latch Testing
Below is the catch that holds the Roadster's boot closed on both the Roadster and Roadster coupe. There are several reasons why this would fail to open. A fuse could be blown, a wire could be damaged, the key could be out of sync or the solenoid that opens the catch...
Roadster Boot Lifter Fix
Boot Gas Struts Pulling Out I don't know how prolific this fault is or if it will become more common but it's something that had happened on OTV's Roadster. So just in case it becomes more common, here is the fix I created. The Roadster coupe boot gas lifters are very...
Roadster Boot Liner
The boot is in the front of the Roadster ok!
Roadster Boot Removal
Roadster (Non Coupe) Boot Removal You have 2 options depending if you want to leave the hinges attached to the boot deck or the car. Leave Hinges Attached To The Car Open the boot and look at the place directly under the hinges, you'll see a pair of nuts each side. If...
Roadster Brabus Skirt Fitting
Remove the old side skirts. They should just pull out to unclip. They are 2 parts per side. To mount Brabus side skirts to your Roadster, you need the hangers. These are the front hangers. Smart part numbers: Q0015876V001000000 Q0015878V001000000 Take out the Torx...
Roadster Brake Bleeding
Warning Brake fluid is dangerous, acidic, poisonous and potentially lethal. Be careful. Not only can it seriously damage paintwork, it can damage organic material so don't dip your balls in this stuff. This page shows you 4 different methods for bleeding the brakes...
Roadster Brake Booster Removal
What Is A Brake Booster It's a booster....right.....(hold onto your hats)....FOR YOUR BRAKES! You don't realise how much pressure you have to put through the brakes to make them work. You have 3 options. 1 - Have 1 incredibly powerful leg. 2 - Have a brake pedal that...
Roadster Brake Caliper Removal
First of all loosen front wheel nuts, jack up the car and place the axle stand securely. Lower onto the stand. Check for security of car on stand - you're going to be working on it! With the wheel removed it will look like this. You are now going to remove the...
Roadster Brake Caliper Seals
Back in 2014, Dave from Brakes International was good enough to send over a calliper rebuild kit. I was supposed to do a fitting guide and send people over to his shop to buy the kits. Unfortunately I'm useless at remembering to do stuff like that. The kit got stored...
Roadster Brake Disc Fitting
The standard Brakes are OK for a standard smart but when you start getting serious with the mods you have to get serious with the brakes.