The Fiat 159 A6.046 – Petrol is a 1,368 cc, inline-four, naturally aspirated engine produced between 2013 and 2018. It belongs to the FIRE (Fully Integrated Robotised Engine) Evo family, featuring multi-point fuel injection (MPFI), dual overhead camshafts (DOHC), and a 16-valve configuration. Delivering 74 kW (101 PS) and 132 Nm of torque, it was engineered for balanced performance and fuel efficiency in compact hatchbacks.
Fitted primarily to the Fiat Bravo (198), Fiat Punto Evo (199), and Lancia Delta (840), the 159 A6.046 – Petrol was designed for drivers seeking a refined driving experience with low running costs. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, meeting Euro 5 standards across its production run as confirmed by VCA UK Type Approval #VCA/EMS/6214.
One documented service concern involves premature wear of the timing belt tensioner, particularly in high-temperature or stop-start environments. This issue, referenced in Fiat Service Information Bulletin 52/2013, is linked to polymer degradation under sustained thermal stress. In 2014, Fiat introduced an updated tensioner with enhanced heat resistance across the FIRE Evo engine range.
All models comply with Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6214).
The Fiat 159 A6.046 – Petrol is a 1,368 cc inline-four naturally aspirated engine engineered for compact and mid-size hatchbacks (2013–2018). It combines multi-point fuel injection with a 16-valve DOHC layout to deliver smooth throttle response and consistent fuel efficiency. Designed to meet Euro 5 emissions standards, it balances everyday usability with cost-effective ownership and serviceability.
| 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 | 73.0 mm × 80.5 mm | |
| Power output | 74 kW (101 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: 120,000 km or 6 years) | |
| Oil type | SAE 5W-30 (API SN/CF, ACEA A5/B5) | |
| Dry weight | 98 kg |
The naturally aspirated DOHC design provides linear power delivery ideal for urban and suburban driving but requires strict adherence to the 120,000 km or 6-year timing belt replacement interval to prevent interference engine damage. SAE 5W-30 oil meeting API SN/ACEA A5 standards is required for optimal valve train and piston ring protection. The 2014-updated tensioner improves durability in high-temperature conditions; pre-2014 units should be retrofitted per service bulletin. Fuel quality is critical—low-octane petrol increases knock risk due to the 11.0:1 compression ratio. Regular air filter and spark plug maintenance ensures consistent combustion and emissions compliance.
Oil Specs: Requires SAE 5W-30 API SN/CF or ACEA A5/B5 (Fiat SIB 52/2013). Not compatible with long-life or low-SAPS specifications.
Emissions: All production models meet Euro 5 standards (VCA Type Approval #VCA/EMS/6214).
Power Ratings: Measured under ECE R85 standards. Output derated on ethanol-blended fuels (Fiat TIS Doc. F159A6046-PERF).
Fiat Technical Information System (TIS): Docs F159A6046-ENG, F159A6046-FSI, SIB 52/2013
VCA Type Approval Database (VCA/EMS/6214)
European Commission Regulation (EC) No 715/2007
The Fiat 159 A6.046 – Petrol was used across Fiat's 198/199 platforms with transverse mounting and front-wheel drive. This engine received platform-specific adaptations-shorter intake manifolds in the Punto Evo and revised engine mounts in the Bravo-and from 2014 the updated tensioner design was implemented across all applications, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side engine block near the transmission bellhousing (Fiat TIS F159A6046-ID). The 8th VIN digit indicates engine type ('C' for 159 A6.046 petrol). Pre-2014 models have a black plastic timing cover with a single access plug; post-2014 units feature a redesigned tensioner housing with improved polymer resistance. Critical differentiation from 1.6L units: The 159 A6.046 has a four-cylinder layout with a shorter stroke. Service parts require production date verification—timing belts and tensioners before 05/2014 are not interchangeable with later units due to design revisions (Fiat SIB 52/2013).
The 159 A6.046 – Petrol's primary reliability risk is timing belt tensioner wear, with elevated incidence in high-temperature or stop-start urban environments. Internal Fiat quality reports from 2015 indicated a notable number of pre-2014 engines required premature belt service due to tensioner degradation, while VCA MOT data shows timing-related failures contribute to a measurable share of engine breakdowns in city-driven examples. Extended service intervals and poor coolant maintenance increase thermal stress, making adherence to replacement schedules and coolant quality critical.
Analysis derived from Fiat technical bulletins (2013–2018) and UK DVSA failure statistics (2015–2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 159-A6-046.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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