M50 and M52 vs 1.8 T 20v: which engine is more reliable?
According to our risk index, the 1.8 T 20v carries less risk than the M50 and M52: 32/100 (moderate risk) versus 52/100 (high risk). The M50 and M52 has 2 documented serious faults, the main one being «Cooling system failure (expansion tank, thermostat, pump and radiator)»; the 1.8 T 20v has 1 documented serious fault, the main one being «Turbo wear and oil consumption».
The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated
Is the M50 and M52 reliable?
The M52 and its predecessor the M50 are six-cylinder petrol engines that the sources describe as durable: Enginescope considers 300,000 km routine with the cooling circuit looked after. Watch the plastic cooling parts, VANOS, crankcase ventilation and oil leaks and, in the aluminium-block M52s built from 1995 to March 1998, cylinder wear caused by sulphur (Nikasil).[1][2][3]
See the 5 of the M50 and M52 faultsIs the 1.8 T 20v reliable?
With up-to-date maintenance, the 20-valve 1.8T has a reputation as a powerful, durable engine for its time, but owner reports document recurring faults: ignition coils (especially on 2001 to 2003 units), water pump and air mass meter, and less often the turbo -sometimes linked to growing oil consumption- and the timing chain tensioner.[4][5][6][7][8][9]
See the 5 of the 1.8 T 20v faultsSide-by-side comparison
| Item | M50 and M52 | 1.8 T 20v |
|---|---|---|
| Technical data | ||
| Type | Engine | Engine |
| Fuel | Petrol | Petrol |
| Displacement | — | 1,781 cm³ |
| Timing | Chain | Timing belt (dry) |
| Power | 150–193 hp | 150–225 hp |
| Production | 1990–2001[10][11][12][13] | 1996–2006[14][15][16][17] |
| Reliability | ||
| Risk index (what is it?) | 52High risk | 32Moderate risk |
| Documented faults | 5 | 5 |
| Of high or critical severity | 2 | 1 |
| Worst severity | Critical severity | High severity |
| Main faults |
|
|
| Most expensive documented repair | No reliable data | No reliable data |
| Which versions to buy | ||
| BuyRecommended versions | None | None |
| With cautionVersions to be cautious about |
| |
| AvoidVersions to avoid | None | None |
Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them
Cars that each one is fitted to
Other comparisons
With the M50 and M52
- M50 and M52 vs 1.2 PureTech
- M50 and M52 vs 1.0 PureTech
- M50 and M52 vs 1.2 and 1.4 TSI
- M50 and M52 vs 1.0 TSI / 1.5 TSI
- M50 and M52 vs 1.2 TCe
- M50 and M52 vs 1.0 EcoBoost
- M50 and M52 vs 1.3 TCe
- M50 and M52 vs 1.6 EcoBoost
- M50 and M52 vs 2.0 TSI / TFSI
- M50 and M52 vs Audi 3.0 TFSI V6
- M50 and M52 vs 2.4, 2.8 and 3.0 V6 30v
- M50 and M52 vs BMW B38 / B37
- M50 and M52 vs BMW B48 / B38
- M50 and M52 vs BMW B58
- M50 and M52 vs M43 1.6, 1.8 and 1.9
- M50 and M52 vs BMW M54
- M50 and M52 vs BMW N13
- M50 and M52 vs BMW N20
- M50 and M52 vs N42 and N45 1.6, 1.8 and 2.0
- M50 and M52 vs BMW N43/N46
- M50 and M52 vs BMW N52 / N53
- M50 and M52 vs BMW N54/N55
- M50 and M52 vs BMW N62 / N63
- M50 and M52 vs 1.0, 1.2 and 1.4 Fire
- M50 and M52 vs 1.4 T-Jet
- M50 and M52 vs 1.0 T3 and 1.3 T4 FireFly Turbo
- M50 and M52 vs 0.9 TwinAir and 1.0/1.3 FireFly
- M50 and M52 vs 1.5 EcoBoost
- M50 and M52 vs 1.25/1.4/1.6 Ti-VCT
- M50 and M52 vs 2.0 EcoBoost
- M50 and M52 vs 2.3 EcoBoost
- M50 and M52 vs 1.0-1.6 8v Endura-E, Duratec 8v and RoCam
- M50 and M52 vs 1.8 and 2.0 Zetec-E
- M50 and M52 vs 1.0 and 1.2 de 3 cilindros (Onix and Tracker)
- M50 and M52 vs 1.4 / 1.6 16v E-TEC II
- M50 and M52 vs 0.8 / 1.0 / 1.2 S-TEC
- M50 and M52 vs 1.2, 1.4 and 1.6 8V (Family 1)
- M50 and M52 vs Family II 2.0 and 2.4 gasolina
- M50 and M52 vs 1.2 / 1.4 / 1.8 i-VTEC
- M50 and M52 vs 1.0 / 1.5 VTEC Turbo
- M50 and M52 vs 2.0 / 2.4 i-VTEC
- M50 and M52 vs Honda e:HEV / i-MMD
- M50 and M52 vs Honda IMA híbrido
- M50 and M52 vs 1.0 T-GDI
- M50 and M52 vs 1.6 GDI / T-GDI
- M50 and M52 vs 1.6 GDi híbrido (Kappa)
- M50 and M52 vs 1.3, 1.4 and 1.6 Alpha
- M50 and M52 vs 1.8 / 2.0 Beta II
- M50 and M52 vs 1.0 and 1.1 Epsilon
- M50 and M52 vs 1.4 / 1.6 MPI Gamma
- M50 and M52 vs 1.0 / 1.25 MPi
- M50 and M52 vs 1.8 / 2.0 Nu
- M50 and M52 vs Smartstream 1.6 T-GDi
- M50 and M52 vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- M50 and M52 vs 2.0 and 3.0 Ingenium gasolina
- M50 and M52 vs 2.3 MZR DISI Turbo
- M50 and M52 vs MZR gasolina
- M50 and M52 vs Skyactiv-G
- M50 and M52 vs M111
- M50 and M52 vs M112 / M113
- M50 and M52 vs M264/M254
- M50 and M52 vs M266 (1.5, 1.7, 2.0 and 2.0 Turbo)
- M50 and M52 vs M260
- M50 and M52 vs M271
- M50 and M52 vs M272/M273
- M50 and M52 vs M270/M274
- M50 and M52 vs M276
- M50 and M52 vs 1.5 VTi-TECH / T-GDI
- M50 and M52 vs MIVEC gasolina
- M50 and M52 vs Mitsubishi PHEV
- M50 and M52 vs 1.6 DIG-T
- M50 and M52 vs 1.5 VC-Turbo e-Power
- M50 and M52 vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- M50 and M52 vs 2.0 MR20DE / 2.5 QR25DE
- M50 and M52 vs 1.5/1.6/1.8 QG
- M50 and M52 vs 1.6 16v HR16DE / H4M
- M50 and M52 vs 1.0/1.2/1.4 Ecotec
- M50 and M52 vs 1.4 Turbo
- M50 and M52 vs 1.6 and 1.8 Ecotec 16v
- M50 and M52 vs 2.2 Ecotec gasolina
- M50 and M52 vs Porsche MA1 / 9A1
- M50 and M52 vs Porsche M96/M97
- M50 and M52 vs Porsche V8 and V6 (Cayenne and Panamera)
- M50 and M52 vs 1.4 and 1.6 TU3/TU5
- M50 and M52 vs 1.4/1.6 VTi
- M50 and M52 vs 1.6 THP
- M50 and M52 vs 1.8, 2.0 and 2.2 16v EW7/EW10/EW12
- M50 and M52 vs 1.8 and 2.0 XU
- M50 and M52 vs 0.9 TCe
- M50 and M52 vs 1.0 SCe (B4D)
- M50 and M52 vs 1.0 TCe / SCe
- M50 and M52 vs 1.4 and 1.6 8v
- M50 and M52 vs 1.8 TCe
- M50 and M52 vs 1.2 16v
- M50 and M52 vs 1.2 8v
- M50 and M52 vs E-Tech Híbrido
- M50 and M52 vs 2.0 16v F4R and F4RT
- M50 and M52 vs 1.4 and 1.6 16v
- M50 and M52 vs Rover K-Series
- M50 and M52 vs 1.0 and 1.4 Boosterjet
- M50 and M52 vs 1.2 Dualjet and 1.2 VVT
- M50 and M52 vs 1.5 K15B (Jimny)
- M50 and M52 vs 1.3, 1.5 and 1.6 gasolina (serie M)
- M50 and M52 vs 1.0 VVT-i
- M50 and M52 vs 1.2 Turbo
- M50 and M52 vs 1.33 Dual VVT-i
- M50 and M52 vs 1.4, 1.6 and 1.8 VVT-i
- M50 and M52 vs 1.5 Hybrid
- M50 and M52 vs 1.6 Dual VVT-i
- M50 and M52 vs 1.8 Hybrid
- M50 and M52 vs 2.7 and 4.0 gasolina (2TR-FE and 1GR-FE)
- M50 and M52 vs 2.0 and 2.4 VVT-i
- M50 and M52 vs 2.0 and 2.5 Hybrid
- M50 and M52 vs Volvo 5 cilindros gasolina
- M50 and M52 vs Drive-E gasolina
- M50 and M52 vs 1.0 MPI
- M50 and M52 vs 1.2 12V
- M50 and M52 vs 1.4 16v and 1.6 FSI
- M50 and M52 vs 2.0 FSI
- M50 and M52 vs VW 2.0 TFSI EA113
- M50 and M52 vs 2.3 VR5 (V5)
- M50 and M52 vs 1.0, 1.4 and 1.6 8v EA111
- M50 and M52 vs 1.6 and 2.0 8v EA827
- M50 and M52 vs VR6
With the 1.8 T 20v
- 1.8 T 20v vs 1.2 PureTech
- 1.8 T 20v vs 1.0 PureTech
- 1.8 T 20v vs 1.2 and 1.4 TSI
- 1.8 T 20v vs 1.0 TSI / 1.5 TSI
- 1.8 T 20v vs 1.2 TCe
- 1.8 T 20v vs 1.0 EcoBoost
- 1.8 T 20v vs 1.3 TCe
- 1.8 T 20v vs 1.6 EcoBoost
- 1.8 T 20v vs 2.0 TSI / TFSI
- 1.8 T 20v vs Audi 3.0 TFSI V6
- 1.8 T 20v vs 2.4, 2.8 and 3.0 V6 30v
- 1.8 T 20v vs BMW B38 / B37
- 1.8 T 20v vs BMW B48 / B38
- 1.8 T 20v vs BMW B58
- 1.8 T 20v vs M43 1.6, 1.8 and 1.9
- 1.8 T 20v vs BMW M54
- 1.8 T 20v vs BMW N13
- 1.8 T 20v vs BMW N20
- 1.8 T 20v vs N42 and N45 1.6, 1.8 and 2.0
- 1.8 T 20v vs BMW N43/N46
- 1.8 T 20v vs BMW N52 / N53
- 1.8 T 20v vs BMW N54/N55
- 1.8 T 20v vs BMW N62 / N63
- 1.8 T 20v vs 1.0, 1.2 and 1.4 Fire
- 1.8 T 20v vs 1.4 T-Jet
- 1.8 T 20v vs 1.0 T3 and 1.3 T4 FireFly Turbo
- 1.8 T 20v vs 0.9 TwinAir and 1.0/1.3 FireFly
- 1.8 T 20v vs 1.5 EcoBoost
- 1.8 T 20v vs 1.25/1.4/1.6 Ti-VCT
- 1.8 T 20v vs 2.0 EcoBoost
- 1.8 T 20v vs 2.3 EcoBoost
- 1.8 T 20v vs 1.0-1.6 8v Endura-E, Duratec 8v and RoCam
- 1.8 T 20v vs 1.8 and 2.0 Zetec-E
- 1.8 T 20v vs 1.0 and 1.2 de 3 cilindros (Onix and Tracker)
- 1.8 T 20v vs 1.4 / 1.6 16v E-TEC II
- 1.8 T 20v vs 0.8 / 1.0 / 1.2 S-TEC
- 1.8 T 20v vs 1.2, 1.4 and 1.6 8V (Family 1)
- 1.8 T 20v vs Family II 2.0 and 2.4 gasolina
- 1.8 T 20v vs 1.2 / 1.4 / 1.8 i-VTEC
- 1.8 T 20v vs 1.0 / 1.5 VTEC Turbo
- 1.8 T 20v vs 2.0 / 2.4 i-VTEC
- 1.8 T 20v vs Honda e:HEV / i-MMD
- 1.8 T 20v vs Honda IMA híbrido
- 1.8 T 20v vs 1.0 T-GDI
- 1.8 T 20v vs 1.6 GDI / T-GDI
- 1.8 T 20v vs 1.6 GDi híbrido (Kappa)
- 1.8 T 20v vs 1.3, 1.4 and 1.6 Alpha
- 1.8 T 20v vs 1.8 / 2.0 Beta II
- 1.8 T 20v vs 1.0 and 1.1 Epsilon
- 1.8 T 20v vs 1.4 / 1.6 MPI Gamma
- 1.8 T 20v vs 1.0 / 1.25 MPi
- 1.8 T 20v vs 1.8 / 2.0 Nu
- 1.8 T 20v vs Smartstream 1.6 T-GDi
- 1.8 T 20v vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- 1.8 T 20v vs 2.0 and 3.0 Ingenium gasolina
- 1.8 T 20v vs 2.3 MZR DISI Turbo
- 1.8 T 20v vs MZR gasolina
- 1.8 T 20v vs Skyactiv-G
- 1.8 T 20v vs M111
- 1.8 T 20v vs M112 / M113
- 1.8 T 20v vs M264/M254
- 1.8 T 20v vs M266 (1.5, 1.7, 2.0 and 2.0 Turbo)
- 1.8 T 20v vs M260
- 1.8 T 20v vs M271
- 1.8 T 20v vs M272/M273
- 1.8 T 20v vs M270/M274
- 1.8 T 20v vs M276
- 1.8 T 20v vs 1.5 VTi-TECH / T-GDI
- 1.8 T 20v vs MIVEC gasolina
- 1.8 T 20v vs Mitsubishi PHEV
- 1.8 T 20v vs 1.6 DIG-T
- 1.8 T 20v vs 1.5 VC-Turbo e-Power
- 1.8 T 20v vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- 1.8 T 20v vs 2.0 MR20DE / 2.5 QR25DE
- 1.8 T 20v vs 1.5/1.6/1.8 QG
- 1.8 T 20v vs 1.6 16v HR16DE / H4M
- 1.8 T 20v vs 1.0/1.2/1.4 Ecotec
- 1.8 T 20v vs 1.4 Turbo
- 1.8 T 20v vs 1.6 and 1.8 Ecotec 16v
- 1.8 T 20v vs 2.2 Ecotec gasolina
- 1.8 T 20v vs Porsche MA1 / 9A1
- 1.8 T 20v vs Porsche M96/M97
- 1.8 T 20v vs Porsche V8 and V6 (Cayenne and Panamera)
- 1.8 T 20v vs 1.4 and 1.6 TU3/TU5
- 1.8 T 20v vs 1.4/1.6 VTi
- 1.8 T 20v vs 1.6 THP
- 1.8 T 20v vs 1.8, 2.0 and 2.2 16v EW7/EW10/EW12
- 1.8 T 20v vs 1.8 and 2.0 XU
- 1.8 T 20v vs 0.9 TCe
- 1.8 T 20v vs 1.0 SCe (B4D)
- 1.8 T 20v vs 1.0 TCe / SCe
- 1.8 T 20v vs 1.4 and 1.6 8v
- 1.8 T 20v vs 1.8 TCe
- 1.8 T 20v vs 1.2 16v
- 1.8 T 20v vs 1.2 8v
- 1.8 T 20v vs E-Tech Híbrido
- 1.8 T 20v vs 2.0 16v F4R and F4RT
- 1.8 T 20v vs 1.4 and 1.6 16v
- 1.8 T 20v vs Rover K-Series
- 1.8 T 20v vs 1.0 and 1.4 Boosterjet
- 1.8 T 20v vs 1.2 Dualjet and 1.2 VVT
- 1.8 T 20v vs 1.5 K15B (Jimny)
- 1.8 T 20v vs 1.3, 1.5 and 1.6 gasolina (serie M)
- 1.8 T 20v vs 1.0 VVT-i
- 1.8 T 20v vs 1.2 Turbo
- 1.8 T 20v vs 1.33 Dual VVT-i
- 1.8 T 20v vs 1.4, 1.6 and 1.8 VVT-i
- 1.8 T 20v vs 1.5 Hybrid
- 1.8 T 20v vs 1.6 Dual VVT-i
- 1.8 T 20v vs 1.8 Hybrid
- 1.8 T 20v vs 2.7 and 4.0 gasolina (2TR-FE and 1GR-FE)
- 1.8 T 20v vs 2.0 and 2.4 VVT-i
- 1.8 T 20v vs 2.0 and 2.5 Hybrid
- 1.8 T 20v vs Volvo 5 cilindros gasolina
- 1.8 T 20v vs Drive-E gasolina
- 1.8 T 20v vs 1.0 MPI
- 1.8 T 20v vs 1.2 12V
- 1.8 T 20v vs 1.4 16v and 1.6 FSI
- 1.8 T 20v vs 2.0 FSI
- 1.8 T 20v vs VW 2.0 TFSI EA113
- 1.8 T 20v vs 2.3 VR5 (V5)
- 1.8 T 20v vs 1.0, 1.4 and 1.6 8v EA111
- 1.8 T 20v vs 1.6 and 2.0 8v EA827
- 1.8 T 20v vs VR6
Compare other engines
Sources
Every fact on this page links to its source. If you find an error, let us know.
- BMW 3 Series E36 320i (M52B20): reliabilityEnginescope · Other source · consulted 2 November 2026
- BMW M52 reliabilityAutoscore · Other source · consulted 2 November 2026
- BMW M52 Engine: Performance, Reliability, and TuningBMWBlog · Motoring press · consulted 2 November 2026
- Fiabilité et pannes Volkswagen Golf IVFiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Fiabilité et pannes Volkswagen PassatFiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Fiabilité et pannes Audi A3Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Fiabilité et pannes Audi TTFiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Fiabilité et pannes Seat LeónFiches-auto.fr · Other source · consulted 27 September 2026 · in French
- Seat Leon Mk1: Probleme, Schwachstellen, ErfahrungenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
- BMW M52Wikipedia (inglés) · Other source · consulted 2 November 2026
- BMW M52Wikipedia (alemán) · Other source · consulted 2 November 2026 · in German
- BMW M50Wikipedia (inglés) · Other source · consulted 2 November 2026
- BMW M50Wikipedia (alemán) · Other source · consulted 2 November 2026 · in German
- List of Volkswagen Group petrol enginesWikipedia · Other source · consulted 27 September 2026
- Audi TTWikipedia · Other source · consulted 27 September 2026
- SEAT LeónWikipedia · Other source · consulted 27 September 2026
- SEAT ToledoWikipedia · Other source · consulted 27 September 2026
- BMW M50 / M52: problemas conocidosEnginescope · Other source · consulted 2 November 2026
- Der BMW M50 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki.de · Other source · consulted 2 November 2026 · in German
- BMW Z3 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026