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Smart Forfour (2014–2021)

2017 Smart Forfour problems

The 2017 Smart Forfour was sold with an engine that we have documented: the 0.9 TCe. The 0.9 TCe has serious faults that affect the cars of that year. Outside the engine, 2 documented faults affect 2017 cars, such as front left hub carrier with insufficient strength (2017 campaign).

Smart Forfour (2014–2021)
Photo: M 93 · CC BY-SA 3.0 de · Wikimedia Commons. Reference image for this generation.
02468105.7out of 10

2017 Smart Forfour score: acceptable reliability

Calculated using only 7 documented faults and their sources: the most serious and frequent faults weigh more. How it is calculated

  • Engine5.15 faults
  • Gearbox10.0No documented faults
  • Suspension7.11 fault
  • Brakes10.0No documented faults
  • Tyres and wheels10.0No documented faults
  • Steering10.0No documented faults
  • Electrical system8.61 fault
  • Electronics and infotainment10.0No documented faults
  • Climate control10.0No documented faults
  • Bodywork and interior10.0No documented faults
  • Airbags and safety10.0No documented faults

What changes compared with the 2016 Smart Forfour

  • No longer affected by: handbrake: the lever gains travel because of the cable adjustment and may not hold the car (rest of the car) and gear selector bowden cable that can come loose and stop P engaging or disengaging (rest of the car)
  • Starts to be affected by: front left hub carrier with insufficient strength (2017 campaign) (rest of the car)

4 sourcesHow we work

0.9 TCe engine in the 2017 Smart Forfour

  • 0.9 TCe 90 (H4Bt, 2012-2024)

    90 hp · H4Bt-400, H4Bt-408, H4Bt-410

    The reliability record is positive and better than that of its sibling the 1.2 TCe, without the oil consumption or rate of chain problems so well documented for that engine. Check the coolant history (leak at the thermostat housing) and, to a lesser extent, any history of noise or work on the timing chain before buying.[3][4]

    With caution

Faults that affect 2017 cars

The Smart Forfour 0.9 TCe: all its faults and what to check

Faults outside the engine in the 2017 Smart Forfour

Buying a 2017 Smart Forfour?

We will put you in touch with a partner only if you authorise it in the form.

Frequently asked questions

Is the 2017 Smart Forfour reliable?

The 2017 Smart Forfour was sold with an engine that we have documented: the 0.9 TCe. The 0.9 TCe has serious faults that affect the cars of that year. Outside the engine, 2 documented faults affect 2017 cars, such as front left hub carrier with insufficient strength (2017 campaign).

Is the 2017 Smart Forfour better than the 2016?

Our score goes from 5.7 in 2016 to 5.7 in 2017. No longer affected by: handbrake: the lever gains travel because of the cable adjustment and may not hold the car (rest of the car) and gear selector bowden cable that can come loose and stop P engaging or disengaging (rest of the car). Starts to be affected by: front left hub carrier with insufficient strength (2017 campaign) (rest of the car).

What is the best year for the Smart Forfour?

According to our score, the best are 2019 and 2018 (7.5/10). The year with the worst score is 2015 (5.7/10). Each year's score counts only the engines sold that year and the faults that affect those cars.

What faults does the 2017 Smart Forfour have?

The most important ones documented for 2017 cars are: timing chain or tensioner failure (0.9 TCe, critical severity), front left hub carrier with insufficient strength (2017 campaign) (suspension, critical severity), coolant leak at the thermostat housing (0.9 TCe, high severity), turbocharger wear or failure (0.9 TCe, high severity) and 12 V battery: a common reason for roadside assistance on 2015 to 2017 Forfours (electrical system, medium severity).

Own a 2017 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.

  1. Mercedes-Benz M281 engineWikipedia (inglés) · Other source · consulted 27 September 2026
  2. Smart ForfourWikipedia (inglés) · Other source · consulted 27 September 2026
  3. Moteur H Renault-NissanWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  4. Fiabilité des 0.9 TCeFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French