1.7 CDTi (Z17DTH/A17DTS)
Opel · 1.7L Diesel I4
2004–2014
"Decent diesel dragged down by DPF/EGR in city driving. Black death injector seal is the horror story. Highway use recommended."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 7
Injector seal leak (black death)
▸Black carbon around injectors, rough running, fuel smell
Copper injector seals deteriorate. Carbon welds injector in place. Early detection critical.
Τσιμούχες μπεκ — μαύρη κρούστα γύρω από μπεκ. Αν δεν πιαστεί νωρίς κολλάνε. 300-1500 EUR.
DPF clogging (city driving)
▸DPF warning, reduced power, high fuel consumption
City driving prevents DPF regen. Athens stop-and-go worst case.
Στην Αθήνα με πόλη το DPF βουλώνει. Χρειάζεται εθνική. 400-1500 EUR.
Dual mass flywheel wear
▸Rattling at idle, vibration, judder on takeoff
DMF wears from diesel torque + city driving. Replace with clutch.
Βολάν διπλής μάζας φθείρεται. Αντικατάσταση μαζί με συμπλέκτη. 600-1200 EUR.
EGR valve failure
▸Rough idle, power loss, black smoke, CEL
EGR clogs with carbon. Common small diesel issue.
Βαλβίδα EGR βουλώνει με άνθρακα. 250-600 EUR.
Swirl flap breakage
▸Loss of torque, CEL, intake noise
Plastic swirl flaps break. Fragments can enter engine.
Πεταλούδες swirl σπάνε. Κίνδυνος εισόδου στον κινητήρα. 200-500 EUR.
Turbo actuator failure
▸Loss of boost, limp mode
Electronic actuator sticks or fails.
Ηλεκτρονικό actuator turbo κολλάει. 300-800 EUR.
Glow plug failure
▸Hard cold start, white smoke, glow plug light
Standard diesel wear. Replace all 4 together.
Προθερμαντήρες — αντικατάσταση και των 4 μαζί. 100-300 EUR.
Models with 1.7 CDTi (Z17DTH/A17DTS) 4
Related Guides
Other Opel Engines
C14NZ/X14XE 1.4
1.4 NA (C14NZ/X14XE)
View details → Compare: 1.7 CDTi (Z17DTH/A17DTS) vs C14NZ/X14XE 1.4C20XE/X20XEV 2.0
2.0 NA (C20XE/X20XEV)
View details → Compare: 1.7 CDTi (Z17DTH/A17DTS) vs C20XE/X20XEV 2.02.0 CDTi (A20DTH)
2.0L Diesel I4
View details → Compare: 1.7 CDTi (Z17DTH/A17DTS) vs 2.0 CDTi (A20DTH)X10XE/Z10XE 1.0
1.0 3-cyl (X10XE/Z10XE)
View details → Compare: 1.7 CDTi (Z17DTH/A17DTS) vs X10XE/Z10XE 1.0Tuning Potential
160hp Stage 1
Frequently Asked Questions
Is the Opel 1.7 CDTi (Z17DTH/A17DTS) reliable?
The Opel 1.7 CDTi (Z17DTH/A17DTS) scores 62/100 with a verdict of CAUTION. It has 7 documented issues with total repair costs between €2,150 and €6,400.
What are the common problems with the 1.7 CDTi (Z17DTH/A17DTS)?
The most common issues are:
- Injector seal leak (black death) — critical, repair cost €300–€1,500, 80,000 km–150,000 km
- DPF clogging (city driving) — high, repair cost €400–€1,500, 40,000 km–100,000 km
- Dual mass flywheel wear — high, repair cost €600–€1,200, 80,000 km–150,000 km
- EGR valve failure — moderate, repair cost €250–€600, 50,000 km–100,000 km
- Swirl flap breakage — moderate, repair cost €200–€500, 60,000 km–120,000 km
What cars use the Opel 1.7 CDTi (Z17DTH/A17DTS)?
The 1.7 CDTi (Z17DTH/A17DTS) is found in:
- Astra 1.7 CDTi (2009–2015)
- Combo 1.7 CDTi (2011–2018)
- Corsa 1.7 CDTi (2006–2014)
- Meriva 1.7 CDTi (2010–2017)
How much does it cost to repair the 1.7 CDTi (Z17DTH/A17DTS)?
Total potential repair costs for all 7 known issues range from €2,150 to €6,400. The most expensive issue is typically .
What years was the 1.7 CDTi (Z17DTH/A17DTS) produced?
The Opel 1.7 CDTi (Z17DTH/A17DTS) was produced from 2004 to 2014. It is a 1686cc I4 diesel engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.