The Euro4 and Euro5 exhausts are very different but it's easy to retrofit.
Smartmods
for all your modding needs, recommended by Evilution
Kane Harrison
451 Exhaust Removal
Fitting an exhaust to a non turbo smart fortwo 451.
451 Exhaust Types
The smart fortwo 451 ran from 2007 to 2014 and in those 7 years we saw a tightening of the emissions laws in Europe which meant that 451 exhausts changed. Due to the confusion, it seems necessary to create a visual list so people know what they need should they need...
451 Exterior Light Wiring
Key:
E = Earth
C4/8 = Connection plug 4, pin 8
Fuse* or F* = Direct connection fuse number
Black Yellow = Wire colour
Modules are labeled in the picture.
451 Facelift Retrofit
Do you own an old 451 but prefer the 2012 facelift bodykit? Time for a change.
451 Factory Cruise Control
This Is All Guesswork A few people have asked me about retrofitting the standard 451 cruise control with the buttons on the steering wheel. I have given them the information required but none of them have actually done it or got back to me. Is Your Car New Enough?...
451 Failed Clutch Actuator
Car Starts & Revs But Doesn't Move Yep, very common now on the 451. Snapped Clutch Actuator Spiral Gear The 451 and Forfour have very similar clutch actuators, both of which suffer from this same fault. Bigger motors and stronger compensation springs for quicker...
451 Fog Light Bulb Change
How to change a blown fog light bulb
451 Foglights/DRL Mod
The 451 foglights are nice, much better than the 450 ones. They are more robust too so are a prime target for modding.
451 Fortwo Arm Rest
Fold the seat down and you'll notice a difference in fabric. This is a join held together by a plastic channel on each side that locks together. Lift it to disconnect... ...the top from the bottom. Pull the fabric cover upwards to reveal a load of metal-work. Look on...
451 Fortwo Bulb List
Smart 451 Fortwo ECE BSN Quantity High Beam H7 499 or 477 2 Low Beam H7 499 or 477 2 Front Fog Light H11 TBC 2 Side Light W5W 501 2 Side Repeater W5W Amber 501A 2 Front Indicator PY21W 581 2 High Level Brake Light T15 or W16W 921 1 Number Plate & Front Interior...
451 Fortwo Coolant Leak
If your car suddenly overheated and you seem to have a waterfall somewhere behind the engine, there's a good chance you have a split coolant pipe.
451 Fortwo Earth Upgrade
Upgrade the 451 Fortwo earth leads
451 Fortwo Fuse Layout
451 Petrol & Diesel Fuse Layout No Amp. Colour 1 Engine 25 A Neutral 2 Windscreen wipers 25 A Neutral 3 Window lifter motor, left and right 20 A Yellow 4 Heater blower 25 A Neutral 5 Fog lights, LED DRLs 10 A Red 6 Parking lights right, instrument lights,...
451 Fortwo Not Selecting Reverse
451 Fortwo 999cc When the 451 fortwo started exhibiting the same problems when selecting reverse, people immediately assumed that smart hadn't learned their lesson and that a faulty brake light switch was to blame as with the previous models. Although it can cause the...
451 Fortwo 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. Remove the...
451 Fortwo SE Drive Pin Out
451 Fortwo Pin Number Wire Colour Connection 1 Red/Grey Charcoal filter shut off 2 Yellow/Red Reverse light 3 Brown/Yellow AMT Control Module Pin 19 4 Blue/Red AMT Control Module Pin 11 Up 5 Brown/White AMT Control Module Pin 20 6 Black/Grey Power 7 No Connection No...
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...
451 Fortwo Speedo Pin Out
451 Speedo Pin Out Speedo Pin Wire Colour Connects To Purpose 1 Red/White SAM Unit Plug 2, Pin 1 Fuse 12, Permanent Live 2 Brown Ground Ground 3 Brown Weight sensing system pin 8 CAN Bus Low 4 Brown/Red Weight sensing system pin 17 CAN Bus High 5 Green/White SAM Unit...
451 Fortwo 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. On the very early smarts it can be found in the left hand boot storage...