According to the service book, the filter should be changed on every 3rd service.
Smartmods
for all your modding needs, recommended by Evilution
Kane Harrison
451 Airbag Controller Pin Out
451 Up to 10/08/2010 24pin / 24pin Connector A Plug A Pin Number Wiring Colour Connects To 1 Brown Earth/Ground 2 Black/Red Fuse 18 Switched Live 3 - - 4 Blue/Black Airbag Indicator Lamp 5 Green/Black Passenger Airbag Off Switch Pin 5 6 - - 7 - - 8 - - 9 - - 10 - - 11...
451 Airbag Controller Removal
The 451 air bag controller is a pain to get to, much like all of the other smart models I guess. You need to remove the lower dash board and the centre console cover. The air bag controller is sitting right in the middle. Since we are playing with air bags, at least...
451 Airbag 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 Alloy Wheels
451 Fortwo Specific Alloys The new Fortwo has a different offset compared to the original which means the alloys may not be immediately compatible with the old alloys. Width Offset PCD Standard Tyre Size What's this? What's this? What's this? What's this? 451 Fortwo...
451 Alloys On A 450
Fitting 451 Fortwo Alloys To Your 450 Fortwo The newer 451 alloys suit the older car quite nicely. The updated designs make the car look more up to date. Do They Just Fit? Yes at the front and no at the back. Front Here are some "Design 3" alloys originally fitted to...
451 American 2 Tow Eye Crash Bar
First Things First I have already had far too many people ask me the same question about this page so I will answer it here. No, this will not fit the 450. It's 451 only. If it did fit the 450, it's something I would have mentioned. Information If you want to add an...
451 Antifreeze Specifications
Recommended Anti-Freeze The easiest thing to do is get on eBay (or similar) and search for either MB325.0 or MB326.0 instead of going to a motorfactors and seeing if any of their coolant matches those specs. There are multipurpose coolants that you can buy that are...
451 Baby Seat ISOfix
These are the part numbers that you need to take a smart dealer. A4518600087 or the updated version A451860187 x1 Isofix frame N000000003120 x4 bolts N000000003175 x4 nuts A4518680039 x2 covers Here is the frame, the 4 nuts and 4 bolts. I didn't get the covers. Go to...
451 Baggy Door Pockets
My girlfriend used to borrow one of my 451s to run around in. She remarked that the door pockets were a bit loose. Well..... yeah! she was stuffing an over sized water bottle in the pocket so the net was being gaped more than a double penetrated porn star. Unlike the...
451 Belt Change
The 451 turbo and non turbo (before the MHD bullshit arrived) had the same belt arrangement. The belt (shown below in red) was driven by the crank pulley and that turned the water pump and the alternator. Obviously you want the water pump to spin so fitting a new belt...
451 Bleeding The Brakes
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...
451 Bluetooth Dash Pod
This is what you receive in the smart bluetooth hands free system. It's compatible with Radio 9 and 10. These haven't been available since 2012. You'll have to search for 2nd hand ones on eBay, look for the following part number: English - A451 906 51 00 English US...
451 Bonnet Catches
Catch Removal Remove the front panels and remove the grill. As you have removed the bonnet already, you'll see the catches. Push the clip in on each side. This is the facelift type. The older type are similar and shown later. Pull the catch off of the stalk. ...
451 Bonnet Opening
The new smart has an easily removable front panel making the access to the light bulbs and fluids much easier.
451 Boost Gauge
451 Turbo Boost Gauge The 451 turbo petrol engine doesn't have the accessibility as the previous 450 Suprex engine. The throttle body is tucked away, the air inlet manifold goes down the back of the engine and all of the useable post-throttle body pipes just aren't...
451 Boot Divider
The roller blind style boot cover came in a + version with a cargo net that required new fittings to be fitted
451 Boot Flap Catch Removal
If one of the catches on your boot hatch fails, you'll need to know how to remove and replace it.
451 Boot Hinge Pins
The 451 is getting old and despite being hidden away, it's becoming more common for the boot hinge pins to rust and snap. Firstly we need to detach the boot from the car to get reasonable access to the hinges. Undo the boot straps on both sides by removing the Torx40...
451 Boot Light
For some reason, smart decided to leave out the rear courtesy light. It was obviously a cost cutting exercise but with a bigger boot and dark materials, it really needs a light.