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.
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Production years 2010–2014 meet Euro 5 standards; 2015–2019 models meet Euro 6b/6d standards depending on variant .
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 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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The Multijet II can be very reliable with strict adherence to its 60,000 km timing belt service and use of high-quality diesel fuel. Neglecting these leads to costly failures. Its advanced fuel system is robust when maintained correctly. With proper care, including regular oil changes and addressing DPF/EGR issues promptly, these engines can exceed 200,000 km.
The most critical issue is timing belt failure. Other frequent problems include high-pressure fuel pump failure (especially in early engines), EGR valve and cooler clogging, and DPF regeneration issues. These are well-documented in Fiat service literature and are often linked to maintenance or fuel quality.
The Multijet II family was used in numerous Fiat and Lancia models, including the Fiat 500X (1.6L/2.0L), Fiat Tipo (1.6L/2.0L), and Lancia Ypsilon (1.3L) from 2011 to 2019. It was also used in various Jeep and Alfa Romeo models under the FCA umbrella during this period.
Aftermarket ECU tuning is common on the MULTIJET-II platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
It's exceptionally economical. Expect around 4.5–5.5 L/100km in combined driving for the 1.6L, which is roughly 63-51 mpg (UK). Highway cruising can see figures as low as 4.0 L/100km (71 mpg UK), while city driving will be higher, around 6.0 L/100km (47 mpg UK). The 2.0L will be slightly thirstier.
Yes, absolutely. This is its single biggest reliability concern. If the timing belt snaps or jumps teeth, the pistons will collide with the valves, causing severe and expensive internal damage. Strict adherence to the 60,000 km replacement interval is non-negotiable.
Fiat specifies SAE 5W-30 oil meeting their 9.55535-S1 standard. This is critical for the health of the turbocharger and emissions systems. A modern ACEA C2 or C3 5W-30 synthetic oil is an acceptable and widely available equivalent. Using the correct low-ash oil is essential for DPF longevity.
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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