2004 Smart Forfour problems
The 2004 Smart Forfour was sold with an engine that we have documented: the MIVEC gasolina. It has no documented serious faults for the cars of that year. Outside the engine, 2 documented faults affect 2004 cars, such as softouch gearbox clutch actuator fault.
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2004 Smart Forfour score: good reliability
Calculated using only 2 documented faults and their sources: the most serious and frequent faults weigh more. How it is calculated
- Engine10.00 faults
- Gearbox6.81 fault
- Suspension7.2Technical inspection (ITV) only: 1.1 times the defects normal for its age
- Brakes8.0Technical inspection (ITV) only: 0.8 times the defects normal for its age
- Tyres and wheels10.0No documented faults
- Steering5.9Technical inspection (ITV) only: 1.6 times the defects normal for its age
- Electrical system10.0No documented faults
- Headlights and lights7.2Technical inspection (ITV) only: 1.1 times the defects normal for its age
- Electronics and infotainment9.31 fault
- Climate control10.0No documented faults
- Bodywork and interior6.2Technical inspection (ITV) only: 1.5 times the defects normal for its age
- Airbags and safety10.0No documented faults
MIVEC gasolina engine in the 2004 Smart Forfour
Names: forfour 1.1 · forfour 1.3 · forfour 1.5
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1.1 (3A91, 2004-2012)
64–75 hp · 3A91
Gebrauchtwagenberater describes the naturally aspirated petrol Colts as easy to maintain and very durable, and Autoplenum considers the pre-2008 petrol models a sound choice; no source records faults specific to the 1.1.[4][5]
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1.3 (4A90, 2004-2012)
95 hp · 4A90
Gebrauchtwagenberater and Autoplenum describe the petrol Colts as robust and low-maintenance, with occasional throttle body defects as the only point cited.[4][5]
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1.5 (4A91, 2004-2012)
109 hp · 4A91
Gebrauchtwagenberater recommends the Colt 1.5 from the 2008 facelift and Auto.cz describes it as a good, reliable base in the Lancer.[4][6]
There are no documented MIVEC gasolina faults that affect 2004 cars.
The Smart Forfour I MIVEC gasolina: all its faults and what to checkFaults outside the engine in the 2004 Smart Forfour
- High severityFrequency: CommonGearbox and clutchSoftouch gearbox clutch actuator faultOn the Forfour 454 with the 6-speed softouch automated gearbox, the clutch actuator wears out and eventually fails: gear changes become increasingly jerky, gears jump out and the dashboard shows gear-position warnings. It does not exist on the 5-speed manual.
- Low severityFrequency: OccasionalElectronics and infotainmentSAM unit and electrical faults from translation between systemsThe Forfour 454 combines Mitsubishi engine management with Mercedes body electronics through a SAM unit, and that combination causes electrical quirks: warning lights that misbehave and CAN communication errors. A Mitsubishi-only workshop may not recognise them.
Buying a 2004 Smart Forfour?
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Frequently asked questions
Is the 2004 Smart Forfour reliable?
The 2004 Smart Forfour was sold with an engine that we have documented: the MIVEC gasolina. It has no documented serious faults for the cars of that year. Outside the engine, 2 documented faults affect 2004 cars, such as softouch gearbox clutch actuator fault.
What is the best year for the Smart Forfour?
According to our score, the best is 2004 (8.3/10). The year with the worst score is 2005 (7.9/10). Each year's score counts only the engines sold that year and the faults that affect those cars.
What faults does the 2004 Smart Forfour have?
The most important ones documented for 2004 cars are: softouch gearbox clutch actuator fault (gearbox and clutch, high severity) and sAM unit and electrical faults from translation between systems (electronics and infotainment, low severity).
Own a 2004 Smart Forfour? Tell us what faults you have had and at how many kilometres. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Smart ForfourWikipedia (de) · Other source · consulted 8 October 2026 · in German
- Mitsubishi 4A9 engineWikipedia (en) · Other source · consulted 8 October 2026
- Mitsubishi 3A9 engineWikipedia (en) · Other source · consulted 8 October 2026
- Mitsubishi Colt VI (Z30) – Typische Probleme & KrankheitenGebrauchtwagenberater · Motoring press · published 9 December 2022 · consulted 8 October 2026 · in German
- Mitsubishi Colt (Z30)Autoplenum · Motoring press · consulted 8 October 2026 · in German
- Ojetý Mitsubishi Lancer (CY, CX): Když lancer, tak benzin!Auto.cz · Motoring press · published 20 July 2017 · consulted 8 October 2026 · in another language