Mod Details
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![451 ED 451 ED](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model3949.png)
![451 Fortwo 451 Fortwo](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model6.png)
This guide is for a right hand drive UK car. LHD cars will probably be the mirror opposite.
For future reference, PAS = Power Assisted Steering.
This guide now has 2 options on removing the rack.
You Will Need
A power steering controller. Part numbers below.
A power steering rack. Left and right hand drive PAS racks are different.
A trip to smart to activate the coding.
If you have Vediamo, you can code it yourself.
PAS Rack Part Numbers
For some reason this keeps getting asked.
RHD – A451460951 (newest revision).
LHD – ?
Fitting The Power Steering Controller
This is the power steering controller for the fortwo 451. Smart part number:
A451 545 09 32 (version 1)
A451 545 62 32 (version 2)
A451 900 32 00 (version 3)
All 3 versions will work.
![](/wp-content/uploads/smartchassis/steeringrack/controller1.jpg)
It has 3 separate connectors. Data, power in and power out to the power steering motor.
![](/wp-content/uploads/smartchassis/steeringrack/controller2.jpg)
If you remove the side part of the dash on the same side as the SAM unit (fuse box), you should see the connectors there already. I have yet to find a 451 that doesn’t already have the wiring in place already.
![](/wp-content/uploads/smartchassis/steeringrack/controller3.jpg)
You are looking for a large multi-pin white connector. A black 2 pin connector and a blue 2 pin connector. Also you are looking for the ring connector (earth). Ignore the multi-pin yellow connector.
![](/wp-content/uploads/smartchassis/steeringrack/controller4.jpg)
The PAS controller bolts to the front bulkheadin the position shown below (RHD).
![](/wp-content/uploads/smartchassis/steeringrack/controller5.jpg)
Take a close look at the bulkhead and you’ll see 2 threaded stud that the controller can mount to.
![](/wp-content/uploads/smartchassis/steeringrack/controller6.jpg)
Before mounting the controller, slide the ring terminal over the top stud.
![](/wp-content/uploads/smartchassis/steeringrack/controller7.jpg)
Then slide the controller over both studs making sure that the ring terminal is secure on the stud.
![](/wp-content/uploads/smartchassis/steeringrack/controller8.jpg)
You will need 2x M6 locking nuts and 2x M6 washers.
![](/wp-content/uploads/smartchassis/steeringrack/controller9.jpg)
Place the washers and the nuts onto the stud and tighten the controller into place. Plug in the 3 connectors.
![](/wp-content/uploads/smartchassis/steeringrack/controller10.jpg)
Fitting The Power Steering Rack
Brace the steering wheel so it can’t turn.
![](/wp-content/uploads/smartchassis/steeringrack/rack1.jpg)
Jack the car up at the front, remove the wheels and disconnect the steering rack arms.
![](/wp-content/uploads/smartchassis/steeringrack/rack2.jpg)
To stop the ball joint from spinning you hold it with a Torx bit whilst undoing the 17mm nut
![](/wp-content/uploads/smartchassis/steeringrack/rack3.jpg)
Then use a ball joint splitter to free the compression fitting.
![](/wp-content/uploads/smartchassis/steeringrack/rack4.jpg)