smart fortwo 451 1.0 mhd, 71 PS, 5-speed automated manual, rear-wheel drive, convertible (2007–2010)

Power
71 PS (52 kW)
Engine codes
3B21
Gearbox
5-speed automated manual
Production years
2007–2010
Running cost per month
€306
Fuel
Petrol
Median price
€5,199
Reliability
2/5
DIY
2/5

Research for this car

Known issues for this car

IssueAffectsTypical kmRepair costSource
Clutch and clutch actuatorAutomated gearbox, all 451Not stated400-800 EUR (Germany, year not stated)Generation guide
Overheating and coolant lossNot split by engineNot stated100-1,500 EUR (Germany, year not stated)Generation guide
Drive belt on MHD petrolMHD (start-stop) petrolNot statedNo confirmed priceGeneration guide
Oil lossNot split by engineNot statedNot statedGeneration guide
Heater shut-off valve recallCars built 2010 to 2014Not statedFree (recall)Generation guide
Exhaust rustNot split, worst on 0.8 CDINot statedNot statedGeneration guide
Tailgate lockNot splitNot statedNot statedGeneration guide

Before you buy this car

From the generation guide

  1. Look for coolant loss. Check the radiator, expansion tank, water pump and hoses for leaks. A leak can mean a water pump or cylinder-head gasket job, which costs up to 1,500 EUR (Germany, year not stated).
  2. Pull away and make several gear changes. Slow, late or jerky shifts, judder, a clutch that slips, a stiff pedal, or the three-bar warning mean a clutch or actuator job, about 400-800 EUR (Germany, year not stated). Ask for proof that the gearbox was re-learned after clutch work. That needs diagnostic equipment.
  3. Check the oil level on the dipstick and look under the engine for oil. Ask for oil change records. Oil loss is common, and it can get the car refused at TÜV.
  4. On an MHD car, listen for whistling, chirping or squealing from the drive belt when starting and driving. These are warning signs of a belt problem.
  5. Look at the exhaust on a lift for rust, mostly on 0.8 CDI cars used for short trips. The catalytic converter and rear silencer are one part on earlier cars, so replacing them is expensive.
  6. Give the VIN to a dealer and ask for open recalls. The heater shut-off valve fix (cars built 2010 to 2014) is free. The brake caliper bracket recall (cars built 28 February to 6 March 2012) corrects bolt torque.

Running costs

Operational€147
Workshop€86
Fixed costs (tax, insurance)€73
Total per month€306
New-car depreciation (not included)€41

ADAC figures for 15,000 km a year over 60 months

Market

Listings on mobile.de in this generation with this fuel, gearbox and power.

Find offers on mobile.de

Listings
192
25th percentile
€3,999
Median price
€5,199
75th percentile
€5,990
Median mileage
110,000 km
Median first registration
2009
Dealer share
67.2%

Check a listing

Prices by first registration

First registrationListingsMedian priceMedian mileage
20163––
20155€8,19072,408 km
201411€6,49998,000 km
201316€6,38093,000 km
201218€5,99090,700 km
20117€4,950118,000 km
201026€4,900120,000 km
200948€4,650117,309 km
200832€4,500122,594 km
200726€4,300132,000 km

Medians only for years with at least 5 listings. Many cars are first registered after production ends, so years can run past the build years.

Price history

MonthListingsMedian priceMiddle halfMedian mileage
Nov 2026192€5,199€3,999 – €5,990110,000 km
Oct 2026192€5,199€3,999 – €5,990110,000 km

Median asking price at the last snapshot of each month.

ADAC versions

All 19 ADAC versions
VersionPowerProduction yearsRunning cost per month
fortwo cabrio 1.0 pure softip71 PS2007–2008€330
fortwo cabrio 1.0 pulse softip71 PS2007–2008€331
fortwo cabrio 1.0 passion softouch71 PS2007–2008€330
fortwo cabrio 1.0 pure softouch71 PS2007–2008€315
fortwo cabrio 1.0 pulse softouch71 PS2007–2008€316
fortwo cabrio 1.0 mhd pure softip71 PS2007–2009€315
fortwo cabrio 1.0 mhd pulse softip71 PS2007–2009€316
fortwo cabrio 1.0 mhd passion softouch71 PS2007–2009€318
fortwo cabrio 1.0 mhd pure softip71 PS2009–2010€315
fortwo cabrio 1.0 mhd pulse softip71 PS2009–2010€319
fortwo cabrio 1.0 mhd passion softouch71 PS2009–2010€321
fortwo cabrio 1.0 mhd pure softouch71 PS2007–2009€304
fortwo cabrio 1.0 mhd pure softouch71 PS2009–2010€307
fortwo cabrio 1.0 mhd pulse softouch71 PS2007–2009€306
fortwo cabrio 1.0 mhd pulse softouch71 PS2009–2010€309
fortwo cabrio 1.0 mhd edition limited two softouch71 PS2008–2009€310
fortwo cabrio 1.0 mhd edition 10 softouch71 PS2008–2009€304
fortwo cabrio 1.0 mhd edition limited three softouch71 PS2009€306
fortwo cabrio 1.0 mhd edition greystyle softouch71 PS2010€309