The Fiat 199 B5.000 is a 1,368 cc, inline-four, naturally aspirated petrol engine produced between 2012 and 2018. It belongs to Fiat’s Fire (Fully Integrated Robotised Engine) family, featuring multi-point fuel injection (MPFI), dual overhead camshafts (DOHC), and 16 valves. Rated at 74 kW (100 PS) and 132 Nm of torque, it was engineered for compact urban vehicles requiring low running costs and ease of maintenance.
Fitted to models including the Fiat Punto, Fiat 500L, and Lancia Ypsilon, the 199 B5.000 was designed for economical city driving with responsive throttle delivery and reduced mechanical noise. Emissions compliance was achieved via a three-way catalytic converter and closed-loop lambda control, meeting Euro 5 standards across all production years.
One documented service concern involves premature wear of the timing belt tensioner, particularly in high-temperature environments. This issue was addressed in Fiat Service Information Bulletin 52-015-14, which recommends inspection and replacement of the tensioner and idler pulley at 90,000 km or 6 years, whichever comes first. Later builds (post-2015) feature a revised tensioner design to improve durability.
All production years 2012–2018 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 199 B5.000 – Petrol is a 1,368 cc inline-four, naturally aspirated engine engineered for compact city cars (2012–2018). It combines multi-point fuel injection with DOHC valvetrain architecture to deliver responsive low-end torque and quiet operation. Designed to meet Euro 5 standards, it prioritises fuel economy and serviceability in urban environments.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,368 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 74.0 mm × 78.4 mm | |
| Power output | 74 kW (100 PS) @ 6,250 rpm | |
| Torque | 132 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Rubber timing belt (interval: 90,000 km / 6 years) | |
| Oil type | SAE 5W-30, API SM/CF or ACEA A1/B1 | |
| Dry weight | 98 kg |
The naturally aspirated design provides linear throttle response ideal for city driving but requires strict adherence to 90,000 km or 6-year timing belt service intervals to prevent catastrophic engine damage. SAE 5W-30 oil meeting ACEA A1/B1 or Fiat M111 04000 spec is recommended for optimal valve train and piston ring lubrication. Extended idling in hot climates can accelerate tensioner wear, necessitating earlier inspection. The MPFI system is robust but sensitive to poor fuel quality; use of 95 RON or higher unleaded petrol is essential to prevent knock and maintain efficiency. Post-2015 models feature an upgraded tensioner design; pre-2015 units should follow Fiat SIB 52-015-14 for preventive replacement. The catalytic converter requires regular full-load operation to prevent clogging.
Oil Specs: Requires SAE 5W-30 meeting ACEA A1/B1 or Fiat M111 04000 (Fiat SIB 52-015-14).
Emissions: Euro 5 certification applies to all 2012–2018 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output varies slightly by model calibration (Fiat TIS Doc. A19955).
Fiat Technical Information System (TIS): Docs A19950, A19952, A19955, SIB 52-015-14
VCA Type Approval Database (VCA/EMS/5678)
European Commission: Regulation (EC) No 715/2007
The Fiat 199 B5.000 – Petrol was used across Fiat's 199/325 platforms with transverse mounting and shared with Lancia under the SelecTronic platform agreement. This engine received platform-specific adaptations-shorter intake manifolds in the Punto and revised ECU tuning in the 500L-and from 2015 the facelifted 500X models adopted the FireFly variant with dual variable valve timing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the transmission bellhousing (Fiat TIS A19980). The 8th VIN digit indicates engine type ('B' for 199 B5.000). Pre-2015 models have red valve covers with a '1.4 16V' badge; post-2015 units use black valve covers. Critical differentiation from FireFly: Original 199 B5.000 uses a rubber timing belt with fixed cam timing, while FireFly variants use a chain with variable valve timing. Service parts require model-year verification—timing kits for pre-2015 models are incompatible with FireFly engines due to cam sprocket redesign (Fiat SIB 52-015-14).
The 199 B5.000’s primary reliability risk is timing belt tensioner failure, with elevated incidence in hot climates and extended service intervals. Internal Fiat quality reports from 2016 noted a significant number of pre-2015 engines requiring premature belt replacement, while VCA MOT records show increased catalytic converter failures in stop-start urban use. Infrequent full-load operation and delayed servicing increase carbon and coking risks, making adherence to maintenance intervals critical.
Analysis derived from Fiat technical bulletins (2012–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 199-B5-000.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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