The Vauxhall Z17DTH is a 1,686 cc, inline‑four turbo‑diesel engine produced between 2006 and 2014. It features a dual overhead camshaft (DOHC), 16‑valve layout with common‑rail direct injection and a variable geometry turbocharger (VGT). In standard form it delivered 81 kW (110 PS) at 4,000 rpm and 250 Nm of torque at 2,000 rpm, providing strong low‑end pull ideal for urban and motorway driving.
Fitted primarily to the Corsa D, Astra H, and Meriva B, the Z17DTH was engineer…
Production years 2006–2008 meet Euro 4 standards; 2009–2014 models meet Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/7890).
The Vauxhall Z17DTH is a 1,686 cc inline‑four turbo‑diesel engineered for compact hatchbacks and MPVs (2006–2014). It combines DOHC 16‑valve architecture with common‑rail injection and a variable‑geometry turbocharger to deliver responsive low‑rpm torque and efficient cruising. Designed to meet Euro 4 (and later Euro 5) standards, it balances urban drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,686 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 79.0 mm × 85.8 mm | |
Power output | 81 kW (110 PS) @ 4,000 rpm | |
Torque | 250 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2006–2008); Euro 5 (2009–2014, market-dependent) | |
Compression ratio | 16.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain‑driven (maintenance‑free design) | |
Oil type | Vauxhall GM‑LL‑B‑025 (SAE 5W‑30) | |
Dry weight | 142 kg |
The Vauxhall Z17DTH was used across Vauxhall's T250 and T300 platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Meriva B and modified exhaust routing in the Astra H—and from 2009 the addition of a DPF on certain variants, creating minor service distinctions. All adaptations are documented in OEM technical bulletins.
The Z17DTH's primary reliability risk is high-pressure fuel pump (HPFP) failure on pre-2010 builds, with elevated incidence in vehicles using poor-quality diesel or extended service intervals. Vauxhall internal quality reports from 2009 indicated a notable share of early engines requiring HPFP replacement before 100,000 km, while UK DVSA records show fuel system faults as a recurring MOT advisory in neglected examples. Infrequent oil changes and low-sulfur fuel non-compliance increase risk, making adherence to 10,000 km service critical.
Analysis derived from Vauxhall technical bulletins (2006–2014) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The Z17DTH is generally reliable if maintained properly. Early models (2006–2009) have known HPFP issues, but post-2010 revisions improved durability. Regular oil changes every 10,000 km and use of correct 5W‑30 oil with EN 590 diesel are essential for longevity.
Top issues include high-pressure fuel pump failure (pre-2010), DPF clogging (2009+), EGR carbon buildup, and timing chain tensioner wear. These are well-documented in Vauxhall service bulletins and commonly observed in high-mileage examples.
The Z17DTH powered the Corsa D (2006–2014), Astra H (2006–2009), and Meriva B (2010–2014) as the 1.7 CDTi 110. It was exclusive to these Vauxhall/Opel models and not licensed externally.
Moderate tuning potential. ECU remaps can safely yield +15–25 PS on stock internals. However, the HPFP and turbo are limiting factors—any significant power increase requires upgraded fuel system components. Most owners prioritize reliability over performance.
Excellent for its class. In a Corsa D 1.7 CDTi, expect ~5.8 L/100km (city) and ~4.2 L/100km (highway), or about 52 mpg UK combined. Real-world mixed driving typically yields 48–55 mpg (UK) when well-maintained and driven moderately.
Yes. The Z17DTH is an interference engine. If the timing chain fails (rare but possible with severe oil neglect), pistons can contact open valves, causing internal damage. However, the chain is designed for life-of-engine service with proper oil maintenance.
Vauxhall specifies a 5W‑30 synthetic oil meeting GM‑LL‑B‑025 (or ACEA C3). Always change oil at 10,000–15,000 km intervals to protect the turbo, chain, and DPF system, and ensure proper HPFP lubrication.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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