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smartmods
for all your modding needs, recommended by Evilution

Kane Harrison

Premium Mod 451 ED Heater Fault451 Fortwo

A new common problem started appearing quite regularly on 451 Electric Drive Fortwos, the heater stopped heating. Sometimes it'll work for a while and stop working again. The issue here is that when you own an electric smart, if you want to use the heater, you must...

Premium Mod 451 ED HV Battery Opening451 Fortwo

This is the high voltage battery removed form a 451 electric drive fortwo. It's 178kg of nearly unmovable nightmares. All around the outside, if you look carefully, there are discoloured spots along the outside lip. I have marked them yellow below. The discolouring is...

Premium Mod 451 ED HV Battery Removal451 Fortwo

This job isn't to be taken lightly. You will need some specialist equipment but it can be done at home in your garage if you really have to. Step 1 is that you have to lift the car high enough so you can get the battery out on some sort of trolley. If you have a...

Normal Mod 451 ED HV Disconnect Plug451 Fortwo

If you are doing any electrical work on your 451 ED, you really should disable the high voltage battery. This is easily done. Make sure the car is turned off before disabling the HV battery. Look underneath the dashboard, next to the fuse box. See the red plug, pull...

Normal Mod 451 ED HV Heater Change451 ED

If the ED heater fix didn't work, you'll have to replace the heater pack. If you have a left hand drive car, your job is easy, just pull back the footwell carpet, remove the polystyrene footwell block and you'll have access to the heater in the cabin airbox. However,...

Premium Mod 451 ED HV Mega Fuse451 Fortwo

If you have a catastrophic high voltage electrical failure, the battery has a safety feature to stop all of that fire, sparks, screaming, running around and gnashing of teeth as everything in the local vicinity also sets on fire. This fault could be a damaged HV cable...

Premium Mod 451 ED Inverter Removal451 ED

Every 10 months or so, my 451 ED would suddenly lose power and show "Drive Sys Eng Off". Even though it would restart immediately after turning the ignition off and on again, you had to come to a complete stop in order to restart the car. Somewhat scary if you were...

Normal Mod 451 ED Noise Maker451 Fortwo

Electric Smarts Make A Noise In many countries, the Government have panicked and demanded that all electric cars make a noise. This noise is a pedestrian warning for idiots who don't look before crossing the road. Smart call it an Acoustic Presence Indicator. Other...

Premium Mod 451 ED Onboard Charger451 Fortwo

I'd been driving my 2013 451 ED for over 4 years with very few issues. Once a year it would cut out but restart with no issues immediately. The error code was about the contractors and they were quite loud when they closed. Then in Q3 2022 I started getting a warning...

Premium Mod 451 Electric Mirrors Retrofit451 ED451 Fortwo

Important Note If your 451 was built from 12/2008 onwards, this job is going to be much easier. If your 451 was built 11/2008 or before, the extra nonsense is nailed onto the end of this page. You Will Need 2 new door wiring looms with the appropriate connectors. A...

Premium Mod 451 Electric Mirrors Wiring451 Fortwo

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.

Premium Mod 451 Electric Window Wiring451 Fortwo

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.

Normal Mod 451 Electrical Connectors451 Fortwo

Accelerator Pedal AC Pressure sensor Aerial Airbag Controller Airbag Switch Blower Motor Brake Fluid Level Switch Dash Button Bank Door Connector Cabin Heater Duct Temperature Sensor ECU Secondary Engine Connector Front Fog Lights Front Radiator Fan Gearbox Controller...

Premium Mod 451 Engine Mount Change451 Fortwo

The 451 engine mount suffers badly from wear which allows too much engine movement, swapping it is very easy.

Premium Mod 451 Engine Mount Repair451 Fortwo

The engine mount for the 451 is quite poorly designed and splits causing the engine to move a lot.
Considering the cost of a new front engine mount you may as well just repair the original one.

Normal Mod 451 ESP Controller Pin Out451 Fortwo

The traction control (ESP & ABS) controller is attached to the side of the ABS pump underneath the car. It's shielded by the plastic undertray for protection. It's easily recognised by the several hard brake pipes coming from the unit. Pin Number Wire Colour...

Premium Mod 451 ESP Removal451 Fortwo

In case you need to spin the wheels to get you out of snow and ice or if you are running your car on a dyno, you need to disable the ESP system.

Normal Mod 451 Exhaust Types451 Fortwo

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...