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2.3 MZR DISI Turbo vs 1.4 and 1.6 TU3/TU5: which engine is more reliable?

According to our risk index, the 1.4 and 1.6 TU3/TU5 carries less risk than the 2.3 MZR DISI Turbo: 36/100 (moderate risk) versus 63/100 (high risk). The 2.3 MZR DISI Turbo has 2 documented serious faults, the main one being «Timing chain stretch and VVT actuator failure on the 2.3 DISI Turbo»; the 1.4 and 1.6 TU3/TU5 has 1 documented serious fault, the main one being «Head gasket damaged after overheating».

Risk index

2.3 MZR DISI Turbo

63

High risk · 2 serious faults

Risk index

1.4 and 1.6 TU3/TU5

36

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

11 sourcesHow we work

Is the 2.3 MZR DISI Turbo reliable?

Mazda's 2.3 DISI Turbo (L3-VDT, 2005-2013) is powerful but demanding: the timing chain, the turbo and oil sludge are its weak points; only buy one with a good oil service history.[1][2][3]

See the 3 of the 2.3 MZR DISI Turbo faults

Is the 1.4 and 1.6 TU3/TU5 reliable?

The TU is one of PSA's most widely built petrol engines: more than 15.6 million units between 1986 and 2014. It is simple (no turbo, no direct injection or particulate filter, belt-driven timing) and has a reputation for durability. The faults owners cite most are cheap wear parts -ignition coils, sensors and thermostat- and not block failures or cylinder head design flaws.[4][5][6][7]

See the 5 of the 1.4 and 1.6 TU3/TU5 faults

Side-by-side comparison

Comparison of 2.3 MZR DISI Turbo and 1.4 and 1.6 TU3/TU5
2.3 MZR DISI Turbo1.4 and 1.6 TU3/TU5
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement2,261 cm³—
TimingChainTiming belt (dry)
Power256–263 hp75–112 hp
Production2005–2013[1][8]1994–2014[4][9][10]
Reliability
Risk index (what is it?)63High risk36Moderate risk
Documented faults35
Of high or critical severity21
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Timing chain stretch and VVT actuator failure on the 2.3 DISI Turbo
  2. High severity: Premature turbocharger wear from poor lubrication on the 2.3 DISI Turbo
  3. Medium severity: Oil consumption and sludge in the 2.3 DISI Turbo engine
  1. High severity: Head gasket damaged after overheating
  2. Medium severity: Ignition coils that fail and cause jerking
  3. Medium severity: Thermostat stuck open or closed
Most expensive documented repairup to €2,200Premature turbocharger wear from poor lubrication on the 2.3 DISI TurboPublished figure[2]No reliable data
Which versions to buy
BuyRecommended versionsNone
  • TU3 1.4 75 hp 8v (TU3JP/TU3KFX, 1994-2014)[5][6]
  • TU5 1.6 88-90 hp 8v (TU5JP, from 1994)[10][11]
  • TU5 1.6 16v 109-112 hp (TU5JP4/TU5NFU, from 2000)[5][6][7]
With cautionVersions to be cautious about
  • 2.3 MZR DISI Turbo 256-260 hp (L3-VDT, 2005-2009)[1][2]
  • 2.3 MZR DISI Turbo (L3-VDT, 2010-2013)[1][2]
None
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

2.3 MZR DISI Turbo

1.4 and 1.6 TU3/TU5

See the 10 models with the 1.4 and 1.6 TU3/TU5

Other comparisons

With the 2.3 MZR DISI Turbo

With the 1.4 and 1.6 TU3/TU5

Compare other engines

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Sources

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

  1. Mazda L engineWikipedia (inglés) · Other source · consulted 5 October 2026
  2. Problemas Mazda CX-7Totalrenting · Other source · consulted 5 October 2026 · in Spanish
  3. 2009 Mazda CX-7 engine problemsCarComplaints · Owners' forum · consulted 5 October 2026
  4. Moteur PSA TUWikipédia (francés) · Other source · consulted 27 September 2026 · in French
  5. Tous les problèmes sur Peugeot 206 (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  6. Tous les problèmes sur Peugeot 307 (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  7. Tous les problèmes sur Citroën Xsara (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  8. Mazda CX-7Wikipedia (inglés) · Other source · consulted 5 October 2026
  9. PSA TU engineWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Peugeot 206Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  11. Citroën XsaraWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish