1.7 CDTi (Z17DTH/A17DTS) vs 2.0 CDTi (A20DTH)

Side-by-side reliability comparison

Higher reliability score
2.0 CDTi (A20DTH) ACCEPTABLE 76/100
+14 points over 1.7 CDTi (Z17DTH/A17DTS)
0 / 100
CAUTION 1.7 CDTi (Z17DTH/A17DTS) Opel
0 / 100
ACCEPTABLE 2.0 CDTi (A20DTH) Opel

Specifications

1.7 CDTi (Z17DTH/A17DTS)
2.0 CDTi (A20DTH)
Brand
Opel
Opel
Verdict
CAUTION
ACCEPTABLE
Reliability
62
76
Years
2004--2014
2008--2018
Displacement
1686 cc
1956 cc
Layout
I4
I4
Type
Diesel
Diesel
Power
110--130 hp
160--195 hp
Known Issues
7
0
Total Risk Cost
€2,150--€6,400
€0--€0

Character

1.7 CDTi (Z17DTH/A17DTS)

"Decent diesel dragged down by DPF/EGR in city driving. Black death injector seal is the horror story. Highway use recommended."

2.0 CDTi (A20DTH)

"Insignia/Zafira. Strong torque. Reliable for GM diesel. DMF wear. Good highway."

Issues Comparison

1.7 CDTi (Z17DTH/A17DTS) 7

◆ CRITICAL
Injector seal leak (black death) €300--€1,500 80,000 km--150,000 km
▲ HIGH
DPF clogging (city driving) €400--€1,500 40,000 km--100,000 km
▲ HIGH
Dual mass flywheel wear €600--€1,200 80,000 km--150,000 km
● MODERATE
EGR valve failure €250--€600 50,000 km--100,000 km
● MODERATE
Swirl flap breakage €200--€500 60,000 km--120,000 km
● MODERATE
Turbo actuator failure €300--€800 80,000 km--150,000 km
○ MINOR
Glow plug failure €100--€300 80,000 km--150,000 km

2.0 CDTi (A20DTH) 0

No documented issues.

Models

1.7 CDTi (Z17DTH/A17DTS) 4

Astra 1.7 CDTi J 2009--2015 Hatchback Combo 1.7 CDTi D 2011--2018 MPV Corsa 1.7 CDTi D 2006--2014 Hatchback Meriva 1.7 CDTi B 2010--2017 MPV

2.0 CDTi (A20DTH) 11

Zafira Tourer C 2012--2019 Astra J 2009--2015 Insignia A 2008--2017 Insignia A 2008--2017 Insignia A 2012--2017 Insignia B 2017--2022 Grandland P1UO 2017--2021 Vectra C 2004--2008 Astra H 2004--2010 Zafira B 2005--2014 Vectra C 2004--2008
Full 1.7 CDTi (Z17DTH/A17DTS) Report Full 2.0 CDTi (A20DTH) Report