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Forum: 451 fortwo - Technical Queries

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  1. Traction control light comes on and stays on until restart during motorway driving

    Seeing a strange problem with my (aged) 451 lately that I've not seen before during her 126,000 miles done so far. While driving from Manchester to London last month during driving rain on the motorway the traction control light comes on and remains lit some 100 miles or so into the journey, I...

    Started by andrewh1973, 16th January 2019 00:22
    • Replies: 3
    • Views: 75
    Yesterday 20:15 Go to last post
  2. Weird noise on start up

    Our Smart MHD has recently started to make a metallic clang noise on starting up from cold. It's literally just one clang and nothing, it runs and drives fine. I'm going to service it tomorrow and have a little look over it but I would be grateful for any input. its just ticked over 60K and...

    Started by jan_tekin, 4th January 2019 21:25
    • Replies: 5
    • Views: 197
    6th January 2019 22:11 Go to last post
  3. Flashing Yellow ECO Light

    My 2009 Model refuses to start now. Initial symptoms started about a week ago where it failed to start when coming to a stand with the MHD switched on. I had to switch engine off and on again. Also noticed that intermittently the ECO light would flash yellow a few times. Car is now refusing to...

    Started by mkrt1972, 3rd January 2019 15:57
    • Replies: 3
    • Views: 163
    4th January 2019 17:17 Go to last post
  4. fault warning light??

    451 smart 4-2 pulse I have a two spanner warning light come on with 'consult workshop' message, also gear change number flashing. servicing is up to date. anyone any ideas?

    Started by s2steamy, 5th December 2018 17:19
    consult workshop, flashing gear symbol., two spanners
    • Replies: 4
    • Views: 346
    7th December 2018 09:50 Go to last post
  5. 2010 451 84hp turbo gearbox oil change

    Morning folks. I managed to change the gearbox oil on a 451 84hp turbo a while ago, as task made much more difficult due to some sort of plastic (intercooler?) air scoop that sits right in the way of the fill plug. I couldn't see this piece on the guide I used, nor how to remove it. In one...

    Started by jonus, 5th September 2018 10:57
    • Replies: 3
    • Views: 839
    7th September 2018 00:20 Go to last post
  6. 451 cdi driveshaft

    My 2009 44hp cdi (50k) has end float on the drivers driveshaft - it moves 5mm at least. Passenger side has no float. Is this normal?

    Started by b1ackb1rd, 23rd July 2018 09:16
    2 Pages
    1 2
    • Replies: 11
    • Views: 1,068
    24th July 2018 22:25 Go to last post
  7. Hissing sound after driving

    Hi all, I went to test drive a smart for two 451 MHD 2010. After test driving, I noticed a hissing sound and water dripping from the bottom of the car. The hissing sounded like air being released from a tyre. My suspicion is that it is related to the air conditioning and is completely normal. But,...

    Started by gt86, 2nd July 2018 16:40
    • Replies: 3
    • Views: 659
    3rd July 2018 13:00 Go to last post
  8. What exactly are these?

    So just what is a fuel filter, combination filter and Poly-V-belt? http://i66.tinypic.com/25hctoh.jpg

    Started by nlel, 8th November 2017 13:02
    4 Pages
    1 2 3 ... 4
    • Replies: 39
    • Views: 6,218
    3rd July 2018 12:58 Go to last post
  9. Removing door mirror

    I need to remove the door mirror from my spare Smart for a mate tomorrow morning. It is parked in a field. Since having a heart attack I can't life my tool box. Can someone tell me what tools I need to get it off please, save me 20 trips from the cellar to the car emptying my tool box into the...

    Started by Mjolinor, 27th June 2018 19:14
    • Replies: 6
    • Views: 723
    28th June 2018 20:54 Go to last post
  10. Continental Eco Contact 5 Tyres

    Looking to buy some Continental Eco Contact 5 Tyres sometime in the future, they don't seem to make then in sizes 155/60/15 front and 175/55/15 rear which are what I currently have fitted to my Smart i.e. the Continental Eco Contact 3. What would be the next best size tyres I could fit?

    Started by nlel, 16th April 2017 11:37
    5 Pages
    1 2 3 ... 5
    • Replies: 49
    • Views: 5,540
    22nd June 2018 06:17 Go to last post
  11. Driveshaft oil seal size

    Does anyone know the dimensions of the driveshaft oil seals on 451. Regards

    Started by macbut999, 20th June 2018 10:36
    • Replies: 2
    • Views: 556
    20th June 2018 22:52 Go to last post
  12. Stutter (misfire) on a cdi

    Hi, have an annoying fault that has just started on our 2009 451 Passion CDI. Under quick acceleration the engine seems to stutter (I can only describe it as very similar to a “misfire” on a petrol car). It will run fine around the town fine but get it up to 60mph and it does the stutter (misfire)...

    Started by gaza9876, 17th June 2018 08:33
    • Replies: 3
    • Views: 599
    17th June 2018 16:15 Go to last post
  13. Just learned something new ...

    I've only had the car 2 years. I've never even noticed this clip before :icon_redf ..... 8th picture down shows a clip on the corner of the carpet. It's not very effective in use https://haynes.com/en-gb/car-manuals/smart/fourtwo/2007-2012/on-demand/10mhd-petrol/opening-bonnet

    Started by EmilysDad, 4th June 2018 17:02
    2 Pages
    1 2
    • Replies: 13
    • Views: 1,364
    5th June 2018 15:03 Go to last post
  14. Tyre Pressures

    Hi Can somebody tell me the correct front and rear tyre pressures for a 2007-2014 451 model Smart Fortwo Passion Coupe Thank You

    Started by nlel, 5th June 2015 17:24
    3 Pages
    1 2 3
    • Replies: 29
    • Views: 15,132
    23rd May 2018 13:44 Go to last post
  15. Pre cursor of things to come?

    Not had any problems at all with this car in nearly 2 years. (84bhp turbo) Drove home from work tonight ..... 23 miles .... with no problems at all. Sometimes in auto & other times with flappy paddles. Just as I was about to pull onto my drive it juddered & stalled (can't tell you whether in auto...

    Started by EmilysDad, 20th May 2018 21:04
    2 Pages
    1 2
    • Replies: 10
    • Views: 1,451
    22nd May 2018 15:49 Go to last post
  16. Seized front brake caliper - or is it?

    Been a while since I've needed a good post. Just tried to drive my Smart to Inverness (469 miles) as you do, driver's side front caliper stuck on about 70 miles in to the journey. Started with a high pitched intermittent squeal (I initially thought it was the heater fan - but it wasn't. I wish it...

    Started by nomen usoris, 8th April 2018 18:58
    2 Pages
    1 2
    • Replies: 10
    • Views: 1,777
    28th April 2018 18:52 Go to last post
  17. Servicing Advise

    At my last service I had the following done... http://i66.tinypic.com/25hctoh.jpg I'm now on 17,700 or so mileage, what should I have done at the next service which will be in Jan/Feb 2018. Spark Plugs? Air Filter? I should probably have the brake fluid changed as it will be 2 years since...

    Started by nlel, 12th June 2017 12:54
    14 Pages
    1 2 3 ... 14
    • Replies: 134
    • Views: 13,062
    25th April 2018 12:45 Go to last post
  18. Help with P2A00 Error

    Hello, Hope someone can help. My wife has only had her CDI Smart a short while and the Engine Management Light came one today. I have an OBDII Scanner and Torque Pro, and the code I have is "P2A00 Powertrain" "O2 Sensor Circuit Range/Performance Bank 1 Sensor 1" I have done some Dr....

    Started by matyb2k, 22nd April 2018 22:22
    heater, p2a00, sensor
    • Replies: 7
    • Views: 1,095
    24th April 2018 06:44 Go to last post
  19. 451 aftermarket exhaust

    Hi, I need to replace the exhaust on my 07 1.0 84hp Euro 4 in the near future. I've seen that quite a few online retailers list a BM91590H as a replacement for less than half the price of a genuine Smart exhaust. It does look quite different, more like a "normal" exhaust. By "normal" I mean...

    Started by mikeb40, 15th April 2018 09:18
    • Replies: 2
    • Views: 1,021
    15th April 2018 13:57 Go to last post
  20. Identifying a noise

    For a few weeks my 09 Smart Passion has developed a slight noise. When I start the engine & drive off, I get this VERY slight & quiet "tap, tap" noise but it lasts for no longer than 5 seconds & it doesn't happen again whilst driving even if I stop with the stop-start function running. It is...

    Started by mareag, 1st April 2018 22:10
    • Replies: 8
    • Views: 1,349
    2nd April 2018 20:43 Go to last post

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