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Forum: 451 fortwo - Performance & Mods

A forum to discuss performance enhancements and modifications to your smart. NO advertising or product offers!

  1. 451 arch flares

    Searched all over t'interweb for some smallish in width arch extensions for all 4 arches. I can find brabus ones which are about the right width for my 205 section tyres but no equivalent for the front. I read somewhere you can fit the rear brabus one if you swap the left and right over. But...

    Started by dolphinfreindly, 22nd May 2019 20:22
    • Replies: 0
    • Views: 9,937
    22nd May 2019 20:22 Go to last post
  2. Tyres

    My 2009 451 45hp cdi commuter needs 4 tyres, I have standard 4.5j and 5.5j wheels. I rarely get to 50mph, so I'm looking for the cheap tyres and as I'm buying a set, in sizes that will increase comfort. Any recommendations?

    Started by b1ackb1rd, 23rd March 2019 21:39
    • Replies: 4
    • Views: 3,653
    26th March 2019 17:46 Go to last post
  3. 451 2011 Brabus Lamda Sensor on catalytic convertor

    Hi, Iíve got a new Lambda sensor NGK that is fitted on the catalytic convertor. Voltage reading is around 0.8 volts whilst driving so thatís ok, then all of a sudden it will just drop to about 0.1 volts with accelerator pedal in same position. Voltage reading will stay this low for a reasonable...

    Started by SUBARB, 18th December 2018 19:14
    2 Pages
    1 2
    • Replies: 10
    • Views: 6,454
    15th January 2019 21:09 Go to last post
  4. 451 springs

    I have to replace a rear spring (again), I'm in 2 minds whether to fit; 1) progressive lowering springs, or 2) 'standard' Brabus springs. I'm not going to drive it like an idiot, and I want a bit of comfort which the standard springs don't seem to offer. Thoughts?

    Started by b1ackb1rd, 29th September 2018 13:10
    • Replies: 4
    • Views: 4,937
    13th October 2018 16:10 Go to last post
  5. Red face Smart Car conversation Kit - assistance needed :)

    Hi all, I have recently joined so please excuse me if I have started a new post or have started this thread when there is another one currently being used. I am sure this topic has come up numerous times, if there is any helpful links please post. My father and I have bought our 2nd...

    Started by G Man, 9th June 2018 20:58
    2 Pages
    1 2
    conversation kit, hayabusa, smart car 451
    • Replies: 11
    • Views: 8,871
    11th August 2018 11:18 Go to last post
  6. Piper cross air filter which way up

    Daft question just bought a piper cross air filter but not sure which way up it goes in as no instructions can anyone help please thanks

    Started by casper958, 24th December 2017 19:14
    • Replies: 1
    • Views: 5,624
    24th December 2017 23:20 Go to last post
  7. S-Mann Exhaust or similar

    As the second Brabus exhaust has given up the ghost on my 451 Brabus, I thought it might be worth looking at another make of exhaust. Has anyone got any recommendations ? I've looked at the S-mann but there doesn't seem to be very many options to replace the standard Brabus exhaust. Thanks in...

    Started by Ibisti, 13th October 2017 08:21
    • Replies: 2
    • Views: 6,021
    17th October 2017 22:57 Go to last post
  8. Speaker upgrade for 451 Grandstyle - fronts and sub done. advice wanted on rears pls

    Hi All I'm a newbie to this forum as I only bought the Smart a couple of months ago. The first thing I found, after my first 35 mile commute, was that my ears hurt from the stereo sound. The car is the Plus model with the Alpine satnav, but the speakers appeared to be two tinny horrible door...

    Started by Jonnyspin, 2nd October 2017 10:18
    door speakers, nakamichi, rear speakers, speakers, underseat subwoofer
    • Replies: 3
    • Views: 5,576
    16th October 2017 13:49 Go to last post
  9. Door speakers

    I want to upgrade the door speakers. Can it be done by popping off the grill & changing them over or do you have to remove the door panel everytime? I'm not wanting to go mad, was thinking maybe Kenwood 3-way speakers.

    Started by Black Knight, 9th August 2016 21:04
    • Replies: 5
    • Views: 8,429
    2nd October 2017 12:26 Go to last post
  10. Dash cam and few other bits

    A week into my Smart ownership, I've added a few things. Driving in Leeds city, the standard of roadmanship gives me cause for concern. Hence cheapie dashcam. I hate wires of any kind on display so hardwired to free constant supply on side of fuse box. Took off the plastic trim and ran cable...

    Started by bwms, 23rd October 2016 16:55
    3 Pages
    1 2 3
    • Replies: 21
    • Views: 20,045
    11th September 2017 22:28 Go to last post
  11. 451 Exhaust wanted

    I am looking for an exhaust upgrade for my non-turbo 451. Any about??

    Started by S2AAZ, 5th September 2017 02:10
    • Replies: 0
    • Views: 5,270
    5th September 2017 02:10 Go to last post
  12. Need to replace Highline audio unit

    The Highline audio/satnav unit in my 2012 fortwo Cabrio (84) is not fit for purpose. Radio reception is poor, satnav capability is unacceptable. There are loads of double DNS units on ebay from less that £100 to £500. Has anyone here replaced their Highline unit? Can anyone recommend a decent...

    Started by anotherbob, 7th July 2017 15:13
    • Replies: 3
    • Views: 6,452
    13th July 2017 11:01 Go to last post
  13. Remap a MHD?

    I wanted to find out if you can remap a 451 mhd. I am happy with the car but it does lack power. I am used to remapped 450. A respected company in North London offers a mhd remap for £175. Another respected independent told me you cannot remap a mhd. Which is right?

    Started by Hadleigh Marky, 14th May 2017 20:31
    • Replies: 5
    • Views: 10,036
    17th May 2017 20:07 Go to last post
  14. Question Adding DRL - What is the big issue ?

    Iím told by Mercedes and a few independent Smart mechanics that the original DRL donít always work if retro fitted; even if a code is used. Apparently you can't even order it as parts from SMART to retro fit anymore, which seems bizarre. Given that the genuine lights as a retro fit are expensive,...

    Started by TINYTOT1, 20th March 2017 19:09
    drl, retrofit
    • Replies: 0
    • Views: 5,755
    20th March 2017 19:09 Go to last post
  15. Better Pollen filter

    Hi, anyone know of a better pollen filter or cabin air filter. I was kinda hoping there would be a company that made better ones a bit like K&N do for engine air filters but there is nothing I can find. Cheers Si

    Started by styleruk, 5th March 2017 15:06
    pollen filter
    • Replies: 6
    • Views: 9,157
    6th March 2017 22:13 Go to last post
  16. Some new bits to fit to my Smart

    Purchased a couple of little bits for my 451 Fortwo, Forge silicone intake pipe and a pipercross panel filter Looking forward to fitting them and seeing if I can notice a difference :)

    Started by Andy2174, 8th October 2016 12:28
    • Replies: 7
    • Views: 11,238
    10th October 2016 20:07 Go to last post
  17. Smart car 451 fortwo Question

    Hello, I am looking for information on where i can purchase some caps/covers for the locking wheel nut on my car. I have purchased the caps for the wheel nuts and just want to finish it off with the other caps. Any help appreciated.

    Started by Vannas, 8th September 2016 19:27
    • Replies: 7
    • Views: 10,572
    10th September 2016 08:25 Go to last post
  18. Headlight upgrades

    What bulbs are best to upgrade to? Sidelights & headlights

    Started by Black Knight, 25th July 2016 00:55
    • Replies: 5
    • Views: 9,945
    8th August 2016 23:44 Go to last post
  19. USB power increase

    Hi I have the hi line sat nav in my smart ED, currently making my own phone holder and was going to run the side USB (found in glove box), to my phone so I can connect to head unit and charge. Usual problem, the power from the USB is tiny and barely keeps the phone charged. One idea I had...and...

    Started by styleruk, 22nd July 2016 08:58
    • Replies: 3
    • Views: 8,210
    22nd July 2016 09:42 Go to last post
  20. Mpg

    I just filled up the wifes 2009 451 84Bhp (50,000 miles) today after the first couple of hundred miles mixed motorway/urban. I was surprised that it does less to the gallon than my Insignia achieving only 41.8mpg - especially as she has a light throttle foot. How do people manage to get the...

    Started by pewe, 2nd February 2016 22:54
    2 Pages
    1 2
    • Replies: 16
    • Views: 18,557
    14th July 2016 16:58 Go to last post

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