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Dualogic vs AL4 / DP0: which gearbox is more reliable?

According to our risk index, the AL4 / DP0 gearbox carries less risk than the Dualogic gearbox: 25/100 versus 29/100 (both moderate risk). The Dualogic gearbox has 1 documented serious fault, the main one being «Actuator or hydraulic pressure fault: the gearbox drops into neutral on its own or refuses gears»; the AL4 / DP0 gearbox has 1 documented serious fault, the main one being «Degraded oil: harsh shifts, slipping and overheating».

Risk index

Dualogic

29

Moderate risk · 1 serious fault

Risk index

AL4 / DP0

25

Moderate risk · 1 serious fault

Lower risk

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

9 sourcesHow we work

Is the Dualogic gearbox reliable?

The Dualogic is the automated manual gearbox that Fiat has fitted since 2003 to models such as the 500, Panda, Grande Punto/Punto, Doblò and Qubo, and that Lancia sells as D.F.N. on the Ypsilon. It has no systemic fault acknowledged by the manufacturer, but there are recurring testimonies of jerking on every gearchange, clutches that wear out early, and actuator faults that make the gearbox drop into neutral on its own while driving.[1][2][3]

See the 2 of the Dualogic gearbox faults

Is the AL4 / DP0 gearbox reliable?

The AL4 (Peugeot and Citroën) and the DP0 (Renault) are the same 4-speed automatic gearbox, developed jointly by both groups and presented in 1998 to replace the old ZF 4HP20. It was fitted for more than a decade across much of both manufacturers' compact and mid-size ranges. As with any automatic gearbox, degraded oil or a low oil level causes harsh shifts and slipping.[4][5][6][7]

See the 2 of the AL4 / DP0 gearbox faults

Side-by-side comparison

Comparison of Dualogic and AL4 / DP0
DualogicAL4 / DP0
Technical data
TypeGearboxGearbox
Gearbox type5-speed automated manual (AMT), single dry clutch, electrohydraulic actuation of the clutch and gear selection4-speed hydraulic automatic with electronic control
Productionsince 2003[1][8][9]since 1998[4][5]
Reliability
Risk index (what is it?)29Moderate risk25Moderate risk
Documented faults22
Of high or critical severity11
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Actuator or hydraulic pressure fault: the gearbox drops into neutral on its own or refuses gears
  2. Medium severity: Premature wear or breakage of the Dualogic clutch
  1. High severity: Degraded oil: harsh shifts, slipping and overheating
  2. Low severity: Jolt or sharp thud when engaging a gear from a standstill
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • Dualogic 5-speed (2003-present)[2][3]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

Dualogic

See the 9 models with the Dualogic gearbox

AL4 / DP0

See the 11 models with the AL4 / DP0 gearbox

Other comparisons

With the Dualogic gearbox

With the AL4 / DP0 gearbox

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Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. DualogicWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  2. Fiabilité et pannes de la Fiat 500Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Fiat 500 (ab 2007) – alle bekannten Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · published 24 November 2023 · consulted 27 September 2026 · in German
  4. Peugeot 406Wikipedia (francés) · Other source · consulted 27 September 2026 · in French
  5. Peugeot 206Wikipedia (inglés) · Other source · consulted 27 September 2026
  6. El aceite de la caja de cambios automática que el fabricante no cambia: evita una avería de 3.000 eurosMotor16 · Motoring press · consulted 27 September 2026 · in Spanish
  7. Síntomas de falta de aceite en una caja de cambios automáticaAutopista.es · Motoring press · consulted 27 September 2026 · in Spanish
  8. SelespeedWikipedia (inglés) · Other source · consulted 27 September 2026
  9. Lancia YpsilonWikipedia (inglés) · Other source · consulted 27 September 2026