KNOWN FAULTS · Alfa Romeo

Known faults for the Alfa Romeo Giulietta.

2010–2020 · Petrol / Diesel

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Engines: 1.4 TB / MultiAir (Petrol)

MultiAir actuator starved of oil pressureValvetrain (MultiAir actuator)

Engine / equipment: 1.4 MultiAir (naturally aspirated and turbo) and the 0.9 TwinAir, which uses the same system: Fiat 500, Punto, Tipo, 500X; Alfa MiTo and Giulietta; Jeep Renegade and Compass; Abarth
Period mentioned: 2009–2024
Symptoms: Hard or rough cold starts, hesitation, stalling and an engine light with P1523 (low oil pressure in the MultiAir system).
Possible cause described: The intake valves are operated by oil pressure through an electro-hydraulic block. Degraded oil, a low level or a dirty secondary filter starve the system of pressure, and over time the actuator fails internally.
Check for the garage: Change the oil and filter with the correct specification, inspect the MultiAir mesh filter and measure oil pressure before replacing the actuator.
Cost cited in the source: Oil change: the cheapest step and often enough; MultiAir actuator: approx. €650–1,400 (converted from dollars)A rough figure from the original database, not an up-to-date quote.

Engines: 1.4 TB / MultiAir (Petrol) · 1.75 TBi (Petrol) · 1.6 / 2.0 JTDm (Diesel)

Applies if: Weak points of this model from inspections, breakdown statistics and recalls; anything specific to one engine is stated in the sheet.

MultiAir, TBi carbon, TCT gearbox and campaigns on the GiuliettaKnown weak points

Engine / equipment: Alfa Romeo Giulietta (petrol and JTDm)
Period mentioned: 2010–2020
Symptoms: The MultiAir unit and coils (rarely) on the 1.4 TB MultiAir; carbon on the injectors and intake of the direct-injection TBi at high mileage; weak engine mounts on the JTDm; a TCT clutch that wears in town; water in the boot via the rear wiper and broken wires in the tailgate.
Possible cause described: Recalls: possibly faulty front arms (February–May 2010), wiring that could disable gear selection (2010–2015) and a diesel intercooler hose that could come off (23/3/2018–6/11/2019).
Check for the garage: Check the campaigns by VIN; test the TCT when pulling away; check the boot and tailgate wiring.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Engines: 1.6 / 2.0 JTDm (Diesel)

Applies if: Only the 2.0 JTDm.

EGR, particulate filter, turbo, dual-mass flywheel and water pump on the 2.0 MultijetExhaust and emissions

Engine / equipment: 1956 cc 2.0 Multijet / JTDm (140–170 hp): Fiat Freemont, Alfa Romeo Giulietta and 159, Lancia Delta, Fiat Bravo
Period mentioned: Approx. 2008–2016
Symptoms: Engine warning light and loss of power (EGR); frequent regenerations or a particulate-filter warning in town; turbo whistle or smoke; vibration when starting and releasing the clutch; coolant loss.
Possible cause described: Poland’s Auto Świat describes this engine’s weak points: the electrically controlled EGR valve gives trouble in Fiat-group cars, every car has a particulate filter that suffers in town use, the turbo fails mostly at high mileage, the dual-mass flywheel wears out with harsh driving and the water pump leaks at its seal or loses its vanes, which can overload the timing belt.
Check for the garage: Read the EGR and particulate-filter codes; listen to the dual-mass flywheel when starting and stopping; replace the water pump with the timing belt; do long runs so the filter can regenerate.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.