Smart Roadster ECE BSN Quantity High Beam H7 499 or 477 2 Low Beam H7 499 or 477 2 Fog Light H3 453 2 Side Light W5W 501 (T10) 2 Side Repeater W5WA 501 Amber (T10) 2 Front Indicator PY21W 581 2 High Level Brake Light W2.3W 284 (T5) 5 Number Plate W5W 501 (T10) 2...
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452 Roadster ECU Cloning
Cloning The 452 Roadster 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...
452 Roadster Engine Removal
452 Roadster Engine Removal Step 0: Disconnect the battery earth connection. Look at the engine, just above the oil filter. You'll see the coolant drain plug. Use a 6mm allen key to open it a couple of turns. I recommend putting some hose over it to guide the coolant....
452 Roadster Fuel Tank Drain
Fuel Filter The fuel filter is quite well hidden, it is behind the nearside rear wheel arch. Jack the car up, remove the wheel and remove the arch liner. On each end of the filter is a connector with an orange clip. To disconnect the pipe you just have to push the...
452 Roadster Heater Lighting
Heater Lighting People often have trouble with the heater lighting, either not being sure if it's back lit at all or having serious issues understanding where the bulbs are and how to access them. The confusion is fair enough because the single bulb is hidden fairly...
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...
452 Roadster SAM Unit Components
Layout If you want to know other other components, let me know. These are the 2 areas that are most problematic. 40 Pin Connector Left (Section 1) Component Number Component Type Ident Rating 1 0603 Resistor 473 47 kΩ 2 0603 Capacitor Blank 10 nF 3 0603 Resistor 823...
452 Roadster Seat Belt Removal
Important If you plan to disconnect the seat belt, ideally you should disconnect the battery. However, since there are voltage spike issues affecting the speedo on the ageing Roadster now, perhaps consider making damn sure you don't turn the ignition on until...
452 Roadster Speedo Cloning
Cloning The Roadster 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...
452 Roadster Towing
Where Is The Towing Eye? Open the passenger door and pull back the carpet in the footwell, in the polystyrene footrest block you will see the towing eye. Pull it from the polystyrene block. Where Does It Go? Being Towed Go to the front of the car and look to the left...
452 Roadster Water Pump Change
Faulty Water Pump? The water pump is designed to leak slightly when it needs replacing. Most of the time it is worn bearings but the have been known to break blades. This reduces the performance of the pump and bits of the blade can block water ways and make noises in...
453 AC Relay Swap
What Is That Clicking Noise Behind Me? It's a complaint I'm hearing more and more, always from 453 fortwo owners. I so rarely drive my 453 and I have all around speakers and a sub so I probably don't hear it. However, it's the air conditioning compressor relay hidden...
453 Accelerator Pedal Pin Out
453 Accelerator Pin Out Accelerator Pin Wire Colour ECU Connection Function 1 Pink/White or Grey/White F3 Pedal Sensor 2 - Signal 2 Brown/White F2 Pedal Sensor 2 - Positive 3 Green G2 Pedal Sensor 1 - Positive 4 Brown or Grey H2 Pedal Sensor 1 - Signal 5 Brown or Pink...
453 Active Brake Assist Fault
You get in your car, start it up and get stabbed in the eyes with a big error message about the active brake assist being inoperative. You click OK and the message goes away. However, there's still an error light showing on the speedo. The issue is the front radar...
453 Air Bag Removal
This page currently covers the removal of the steering wheel airbag, the passenger side dashboard airbag and the driver side knee airbag. Important Rule 0 when playing with airbags, disconnect the earth connection from the battery. Make sure it can't accidentally move...
453 Air Con Fill Points
If you need to fill or top up the air conditioning in the 453, open the bonnet. Here are the fill points. AC Gas Type And Quantity Model Gas Type Gas Qty Grams Oil Type Oil Qty Millilitres 450 Fortwo 600cc R134A 620 ± 10 PAG 46 or PAO 68 180 450 Fortwo 700cc R134A 450...
453 Air Filter Change
This is the engine of the 453. The airbox is over on the left. Look down the back of the airbox... ...and you'll see 2 Torx25 screws. Remove them. You can use a 7mm socket to undo the hose clip that holds the pipe to the airbox lid. Disconnecting this pipe will allow...
453 Alarm Fault
Bob S was one of the many people experiencing the alarm on his 453 going off all the time. It's already a known fault at smart so we know the problem. The problem is the switch. The switch is pushed in by the bonnet (hood). If the bonnet is removed or tampered with,...
453 Alloy Wheels
453 Fortwo & Forfour Specific Alloys (late 2014 on) - 4 stud alloys C453 & W453 Steel Wheels 15" Offset PCD Tyre Size Centre Bore Front 5" ET 32 4x100mm 165/65/15 60mm Rear 5.5" ET 42 4x100mm 185/60/15 60mm C453 & W453 'Value' 15" Offset PCD Tyre...
453 Android Stereo
Whenever anyone on the forums asks about a new stereo on the 453, people will always recommend the nameless Chinese made 9 inch Android stereo that's available all over AliExpress and similar China based e-commerce sites. They all look the same so I suspect they are...