The Fiat 552 63 623 is a 1,197 cc, inline — three petrol engine produced between 2019 and 2023. It belongs to the Fiat Global Small Engine (GSE) family, also marketed as the FireFly engine series. Featuring multi — point fuel injection (MPFI), dual overhead camshafts (DOHC), and 12 valves, it delivers 54 kW (73 PS) with 108 Nm of torque. This configuration prioritises compact packaging, low weight, and urban fuel efficiency for city hatchbacks.
Fitted to models such as the Fia…
All production units comply with Euro 6d-Full emissions standards .
The Fiat 552 63 623 is a 1,197 cc inline-three petrol engine designed for compact city cars (2019–2023). It combines multi-point fuel injection with dual overhead camshafts to deliver responsive low-end torque and efficient urban operation. Engineered to meet Euro 6d-Full standards, it balances everyday drivability with fuel economy and emissions compliance for European urban environments.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,197 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 79.0 mm × 80.5 mm | |
Power output | 54 kW (73 PS) @ 6,000 rpm | |
Torque | 108 Nm @ 3,500 rpm | |
Fuel system | Multi-point fuel injection (MPFI) | |
Emissions standard | Euro 6d-Full | |
Compression ratio | 11.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Wet timing chain (front-mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 89 kg |
The Fiat 552 63 623 was used across Fiat's 312/356 platforms with transverse mounting and shared with Lancia for badge-engineered variants. This engine received platform-specific adaptations-shorter intake manifolds in the Panda and revised throttle mapping in the Tipo-and from 2021 the updated 500 City Cross adopted the revised tensioner, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The 552 63 623 offers solid reliability when maintained properly, though early models (2019–2020) had timing chain tensioner concerns. Later revisions (post-2021) improved tensioner durability, so well-maintained engines can exceed 150,000 km. Regular oil changes (every 15,000 km) with correct 5W-30 specification are essential to prevent chain wear and ensure longevity.
The main issues include timing chain tensioner wear (especially pre-2021), throttle body carbon buildup, coolant leaks from the thermostat housing, and ignition coil failures. These are documented in Fiat service bulletins and are typical of high-mileage naturally aspirated engines. Regular maintenance significantly reduces the risk of major repairs.
This 1.2L petrol engine was used in the Fiat 500 (312), Panda (319), and Tipo (356) from 2019 to 2023. It was also fitted to the Lancia Ypsilon (319) from 2021 to 2023. The engine complies with Euro 6d-Full standards across all applications, with no Euro 6e variant produced for this code.
Tuning potential is very limited. Being a naturally aspirated 1.2L three-cylinder engine, it lacks the airflow capacity for significant gains. ECU remaps yield minimal improvements (~5–10 kW) due to hardware constraints. Performance modifications like exhaust or intake upgrades offer negligible benefits. This engine is designed for economy, not performance, and tuning is uncommon.
Good for a naturally aspirated petrol engine. In a Fiat 500 1.2, combined consumption is ~5.6 L/100km (~50 mpg UK). City driving may see 7.0 L/100km (~40 mpg), while highway runs can achieve 4.9 L/100km (~57 mpg). Real-world economy depends on driving style, but 40–50 mpg (UK) is typical for mixed use.
Yes. The 552 63 623 is an interference engine. If the timing chain fails or jumps, the pistons can contact the open valves, causing bent valves or cylinder head damage. This makes timing system maintenance critical—any unusual front-engine rattle should be investigated immediately to prevent catastrophic failure.
Fiat specifies SAE 5W-30 oil meeting API SN/CF or ACEA A5/B5 standards. Use of correct specification oil is vital for protecting the timing chain system and reducing wear. Change intervals should not exceed 15,000 km or 12 months to ensure optimal engine protection and longevity.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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