The Fiat 939 A4.000 is a 1,368 cc, inline‑four petrol engine produced between 2010 and 2015. It features a dual overhead camshaft (DOHC) design with 16 valves and Fiat's MultiAir electro‑hydraulic variable valve timing technology. This system allows for precise, cylinder — by — cylinder control of intake valve lift and timing, enhancing both fuel efficiency and low — end torque.
Fitted primarily to the Fiat 500L (330) and 500X (359) models, the 939 A4.000 was engineered to…
Production years 2010–2015 meet Euro 5 standards for relevant markets (EU Type Approval e13*2005/55*0267).
The Fiat 939 A4.000 is a 1,368 cc inline‑four petrol engine engineered for compact MPVs and crossovers (2010-2015). It combines MultiAir valve control with a chain-driven DOHC valvetrain to deliver responsive performance and excellent fuel economy. Designed to meet Euro 5 standards, it balances everyday drivability with low emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,368 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 72.0 mm × 84.0 mm | |
Power output | 70–77 kW (95–105 PS) | |
Torque | 128–132 Nm @ 4,500 rpm | |
Fuel system | Sequential multi‑point injection | |
Emissions standard | Euro 5 | |
Compression ratio | 11.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven | |
Oil type | Fiat 9.55535‑S2 (SAE 5W‑40) | |
Dry weight | 102 kg |
The Fiat 939 A4.000 was used across Fiat's compact MPV and crossover platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU calibrations for the 500L and revised engine mounts for the 500X-creating no significant interchange limits. All adaptations are documented in OEM technical bulletins.
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The 939 A4.000's primary reliability risk is MultiAir system malfunction, with elevated incidence in vehicles subjected to extended oil change intervals. Fiat internal reports noted a correlation between oil degradation and solenoid failure, while owner data suggests water pump issues are more common in higher-mileage examples. Neglecting oil service makes MultiAir unit replacement critical.
Analysis derived from Fiat technical bulletins (2010-2015) and aggregated European owner association failure statistics (2012-2020). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 939 A4.000 is generally reliable if meticulously maintained, particularly regarding oil changes. Its main vulnerabilities are the MultiAir system and the integrated water pump. With strict adherence to service schedules using the correct oil, these engines can easily surpass 150,000 km without major issues.
The most frequent issues are failures of the MultiAir solenoid/module, the integrated water pump, and ignition coils. Oil leaks from the cam cover gasket are also common as the engine ages. These are well-documented in Fiat service bulletins and owner forums.
This 1.4L petrol engine was primarily used in the Fiat 500L (330 series, 2012-2015) and the Fiat 500X (359 series, 2014-2015). It powered the 1.4 16V variants of these compact MPV and crossover models.
Yes, modest power gains are possible via ECU remapping, typically unlocking an extra 10-15 kW. However, the MultiAir system's complexity makes aggressive tuning risky. Significant power increases usually require hardware upgrades and are not common due to the engine's design focus on efficiency.
Fuel economy is good for its class. In a Fiat 500L, expect combined figures around 6.0-6.5 L/100km (approx. 43-47 mpg UK). The slightly heavier 500X might return 6.5-7.0 L/100km (approx. 40-43 mpg UK). Real-world consumption depends heavily on driving style.
Yes. The 939 A4.000 is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing severe internal engine damage. Fortunately, the chain is robust and rarely fails if basic maintenance is performed.
Fiat mandates the use of fully synthetic oil meeting specification 9.55535-S2, typically a 5W-40 viscosity. Using the correct oil is paramount for the longevity of the MultiAir system. Oil should be changed every 20,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
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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