Petrol · 2014–2024
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
All about the smart fortwo / forfour (453)All about the 0.9 / 1.0 TCe & 1.0 SCe (H4B / H4D) engine
The 0.9 / 1.0 TCe & 1.0 SCe (H4B / H4D) engine was fitted to the smart fortwo / forfour (453) (2014–2024). In the EU that is 75.8 % of all new cars of this generation.
Versions: 1.0 71 hp, 0.9 90 hp, 0.9, 1.0, 1.0 61 hp.
✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Signs: Rattle for a few seconds on cold start, later camshaft/crankshaft correlation fault codes and engine light
Fix: Do not ignore the noise; measure chain stretch (live data or inspection) and replace chain, tensioner and guides; change oil more often than the long factory interval
Signs: Coolant level drops slowly, smell or traces of coolant, temperature warning; if missed the engine overheats
Fix: Check the coolant level regularly; replace the thermostat housing or water outlet with its seals; after any overheating check the head gasket
Signs: Misfire, rough running, flashing engine light, coolant level dropping without an outside leak
Fix: Do not just replace the coil: find where coolant enters the coil wells (dealer has a repair procedure on the engine); ask about goodwill on cars still young
Signs: Metallic rattle from the turbo when lifting off or at low load; sometimes power loss with an underboost code
Fix: Dealer ECU update (Renault technical note) for the rattle; for power loss check the turbo air hose and the boost control valve before replacing the turbo
Signs: Slipping, high bite point
Fix: Replace clutch kit
Signs: Flashing gear indicator, no drive
Fix: Repair or replace mechatronic
Signs: Judder pulling away
Fix: Replace clutch pack
Typical routine maintenance cost for 100,000 km: €2,200–4,950. Sum of the services and wear parts in the plan above (about 15,000 km a year, independent workshop), without faults.
Intervals and typical prices for the smart fortwo / forfour (453) with the 0.9 / 1.0 TCe & 1.0 SCe (H4B / H4D) engine. The app gives the exact plan for your mileage.
| Item | Interval | Typical price |
|---|---|---|
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Spark plugsIgnition | every 60,000 km or every 48 months | €50–160 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
| Manual gearbox oilTransmission | every 150,000 km | €60–130 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 1.0 Petrol999 cm³ · 52 kW (71 hp) | 45.7 % | 2014–2024 | 131 g/km | 4.1 L |
| 0.9 Petrol898 cm³ · 66 kW (90 hp) | 25.3 % | 2015–2024 | 127 g/km | 5.5 L |
| 0.9 Petrol898 cm³ | 1.8 % | 2015–2018 | 98 g/km | — |
| 1.0 Petrol999 cm³ | 1.5 % | 2014–2019 | 116 g/km | — |
| 1.0 Petrol999 cm³ · 45 kW (61 hp) | 1.1 % | 2015–2020 | 104 g/km | — |
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Recalls the manufacturer published in the United Kingdom for this model (12). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
Chain.
5W-30 / 5W-40 · Renault RN0700 / RN17 · ~4.1 L · every 15,000 km.
Renault Clio IV 2012–2019Renault Captur I 2013–2019Dacia Sandero II 2012–2020Dacia Duster II 2017–2024Renault Captur II 2019–Renault Clio V 2019–Nissan Juke (F16) 2019–Nissan Micra (K14) 2016–2023Dacia Logan II 2012–2020Dacia Sandero III 2020–Renault Twingo III 2014–2024Dacia Jogger 2021–
Main sources for the faults of this engine:
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles. How we check the data →
Updated 29/10/2026