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 provide a balance of urban agility and highway capability for compact MPVs and crossovers. Emissions compliance was achieved through optimized combustion and catalytic conversion, allowing it to meet stringent Euro 5 standards upon its introduction.
One documented concern is potential failure of the water pump, which is integrated into the timing system on some variants. This issue, referenced in Fiat Technical Service Bulletin TSB‑10‑05‑03, can lead to coolant loss and overheating if not addressed. Fiat later revised the pump design in subsequent production runs.
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 MultiAir system provides crisp throttle response ideal for city and highway driving but requires strict adherence to 20,000 km or annual oil change intervals to maintain hydraulic unit integrity. Fiat 9.55535-S2 (5W-40) oil is critical due to its specific additive package protecting the MultiAir actuators. Extended oil service can lead to carbon buildup, affecting valve control. The integrated water pump is a known failure point on early units; inspection per Fiat TSB 10-05-03 is recommended for pre-2013 models.
Oil Specs: Requires Fiat 9.55535-S2 (SAE 5W-40) specification (Fiat TSB 10-05-03). Compatible with ACEA C3.
Emissions: Euro 5 certification applies to all production years (2010-2015) for EU markets (EU Type Approval e13*2005/55*0267).
Power Ratings: Measured under ECE R85 standards. Output varies by model application (Fiat Technical Specification Sheet).
Fiat Technical Information System: Docs 9.939.00, TSB 10-05-03
European Commission Type Approval Database (e13*2005/55*0267)
Fiat EPC (Electronic Parts Catalogue)
ECE Regulation No. 85 (Engine Power Measurement)
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.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Fiat Workshop Manual 9.939.00). The 8th VIN digit typically corresponds to the engine code for Fiat vehicles. Visually, the engine is identifiable by its compact size and the MultiAir module mounted on the intake camshaft cover. Critical differentiation from the 937A5000: The 939 A4.000 is used in larger vehicles (500L/X) and may have a different accessory layout, but the core engine architecture is identical. Service parts are generally interchangeable within the 939 family, but MultiAir components are specific and require VIN verification for ordering (Fiat EPC).
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.
Find answers to most commonly asked questions about FIAT 939-A4-000.
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Regulation (EC) No 715/2007
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