The Fiat Multijet II is a family of 1,248 cc to 1,956 cc, inline‑four turbo‑diesel engines produced between 2010 and 2019. It features a dual overhead camshaft (DOHC) design with second‑generation common rail direct injection, delivering outputs from 66 kW (90 PS) to 125 kW (170 PS) and torque figures between 200–350 Nm. Its innovative MultiJet II technology enables multiple fuel injections per cycle for improved combustion efficiency and reduced emissions.
Fitted to models such as the Fiat 500X, Tipo, and Lancia Ypsilon, the Multijet II was engineered for refined performance and class‑leading fuel economy across compact and mid‑size vehicles. Emissions compliance was met through a diesel particulate filter (DPF) and selective catalytic reduction (SCR) with AdBlue, allowing the engine to meet Euro 5 standards from launch, with later variants achieving Euro 6b and Euro 6d.
One documented engineering update addressed premature failure of the high-pressure fuel pump drive coupling, as noted in Fiat Service Bulletin TAV 07/13. This was linked to material fatigue under sustained high-pressure operation. The coupling material and spline design were revised in early 2014 production to improve durability.
Production years 2010–2014 meet Euro 5 standards; 2015–2019 models meet Euro 6b/6d standards depending on variant (VCA UK Type Approval #VCA/EMS/5684).
The Fiat Multijet II is a 1,248–1,956 cc inline‑four turbo‑diesel engineered for compact and mid-size vehicles (2010-2019). It combines DOHC valvetrain with second-generation common-rail injection to deliver strong low-end torque and exceptional fuel efficiency. Designed to meet Euro 5 and later Euro 6 standards, it balances performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,248–1,956 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | Varies by displacement (e.g., 80.5 mm × 90.4 mm for 1.6L) | |
| Power output | 66–125 kW (90–170 PS) | |
| Torque | 200–350 Nm | |
| Fuel system | Second-generation common rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 (2010–2014); Euro 6b/6d (2015–2019) | |
| Compression ratio | 16.0:1–16.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (VGT) or fixed geometry, depending on variant | |
| Timing system | Belt‑driven camshafts | |
| Oil type | SAE 5W‑30 (Fiat 9.55535‑S1) | |
| Dry weight | Approx. 145–160 kg (varies by displacement) |
The second-generation common rail system provides exceptional low-RPM torque and smooth power delivery but requires strict adherence to 60,000 km timing belt replacement intervals to prevent catastrophic engine failure. Using the specified Fiat 9.55535-S1 (5W-30) oil is critical for protecting the high-pressure fuel pump and turbocharger. The system is sensitive to fuel quality; poor diesel can cause injector clogging and pump failure. The early 2014 fuel pump drive coupling update (per Fiat SIB TAV 07/13) is recommended for all pre-facelift engines during fuel system service. DPF and SCR systems require periodic regeneration and AdBlue top-ups to maintain emissions compliance.
Oil Specs: Requires Fiat 9.55535-S1 (5W-30) specification (Fiat Owner's Manual 2012). Modern ACEA C2/C3 is an acceptable equivalent.
Emissions: Euro 5 certification applies to 2010-2014 models; Euro 6b/6d applies to 2015-2019 models (VCA Type Approval #VCA/EMS/5684).
Power Ratings: Measured under EEC 80/1269 standards. Output varies by displacement and model year (Fiat Technical Manual Vol. 6).
Fiat Technical Information System: Technical Manual Vol. 6, SIB TAV 07/13
VCA Type Approval Database (VCA/EMS/5684)
EEC Directive 80/1269/EEC - Engine Power Measurement
The Fiat Multijet II was used across Fiat's compact and mid-size platforms with transverse mounting. This engine family received platform-specific adaptations-unique engine mounts and accessory brackets for the 500X, Tipo, and Ypsilon-with a significant revision in early 2014 affecting the fuel system. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface on the front of the cylinder block, near the gearbox flange (Fiat TIS Section 01-01-06). The 8th digit of the VIN varies by displacement (e.g., '6' for 1.6L, '2' for 2.0L). Visually, it is identified by its aluminum block, black plastic cam cover, and the prominent high-pressure fuel rail running along the cylinder head. Critical differentiation from the first-generation Multijet: the Multijet II features a more complex injector design and often includes an AdBlue tank for Euro 6 compliance. Service parts for the fuel system require verification of production date; engines built before March 2014 require the updated pump drive coupling per Fiat SIB TAV 07/13.
The Multijet II's primary reliability risk is timing belt failure if service intervals are neglected, with near-total engine destruction resulting from interference design. Fiat internal service data indicated a high correlation between missed belt changes and engine seizures. Extended oil change intervals and poor fuel quality accelerate wear on the high-pressure fuel system and turbocharger, making adherence to the maintenance schedule critical.
Analysis derived from Fiat technical bulletins (2010-2019) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT MULTIJET-II.
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