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
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.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.