H4B (SCe 1.0)
Smart · 1.0 NA
2014–present
"Renault H4B in a Smart box. Slow but honest. Simple 3-cyl, no turbo drama. Perfect city runabout."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 3
Thermostat failure
▸Temperature fluctuation, slow warm-up, CEL
Electronic thermostat sticks. Common Renault trait. Easy replacement.
Ηλεκτρονικός θερμοστάτης κολλάει. Κοινό θέμα Renault. Εύκολη αντικατάσταση.
Ignition coil failure
▸Misfire, rough idle, CEL
3-cylinder = each coil failure very noticeable. Keep spare coil in glovebox.
3-κύλινδρος = κάθε βλάβη πολύ αισθητή. Κρατήστε ανταλλακτικό πολύ.
Engine mount vibration
▸Excessive vibration at idle, clunk on acceleration
Rear-mounted 3-cyl vibrates. Mounts wear faster than expected. Replace in pairs.
Πίσω τοποθετημένος 3-κύλινδρος δονείται. Βάσεις φθείρονται γρηγορότερα. Αντικατάσταση σε ζεύγη.
Models with H4B (SCe 1.0) 3
Other Smart Engines
Tuning Potential
None practical
Frequently Asked Questions
Is the Smart H4B (SCe 1.0) reliable?
The Smart H4B (SCe 1.0) scores 72/100 with a verdict of ACCEPTABLE. It has 3 documented issues with total repair costs between €450 and €1,150.
What are the common problems with the H4B (SCe 1.0)?
The most common issues are:
- Thermostat failure — moderate, repair cost €200–€450, 50,000 km–100,000 km
- Ignition coil failure — minor, repair cost €100–€300, 40,000 km–80,000 km
- Engine mount vibration — minor, repair cost €150–€400, 60,000 km–120,000 km
What cars use the Smart H4B (SCe 1.0)?
The H4B (SCe 1.0) is found in:
- ForFour 1.0 (2014–present)
- ForTwo 1.0 (2014–present)
- ForTwo Cabrio (2016–present)
How much does it cost to repair the H4B (SCe 1.0)?
Total potential repair costs for all 3 known issues range from €450 to €1,150. The most expensive issue is typically .
What years was the H4B (SCe 1.0) produced?
The Smart H4B (SCe 1.0) was produced from 2014 to present. It is a 999cc I3 petrol na engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.