The Vauxhall Z19DT is a 1,910 cc, inline‑four turbo‑diesel engine produced between 2005 and 2012. It features a 16‑valve DOHC layout, common‑rail direct injection, and a single variable‑geometry turbocharger (VGT). In standard form it delivers 96–103 kW (130–140 PS) and 300–320 Nm of torque, offering strong low — end pull ideal for mixed and motorway driving.
Fitted to the Astra H, Zafira B, and Vectra C, the Z19DT was engineered for mid — size efficiency with responsive p…
Production years 2005–2008 meet Euro 4 standards; 2009–2012 models may comply with Euro 5 depending on market .
The Vauxhall Z19DT is a 1,910 cc inline‑four turbo‑diesel engineered for compact and mid-size applications (2005–2012). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver robust low-rpm torque and efficient cruising. Designed to meet Euro 4 (and select Euro 5) emissions standards, it balances performance with diesel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,910 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.0 mm × 90.4 mm | |
Power output | 96–103 kW (130–140 PS) | |
Torque | 300–320 Nm @ 2,000–2,750 rpm | |
Fuel system | Bosch CP3.4 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2005–2008); Euro 5 in select 2009–2012 models | |
Compression ratio | 16.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 148 kg |
The Vauxhall Z19DT was used across Vauxhall's Astra H, Zafira B, and Vectra C platforms with transverse mounting and shared with Opel under GM's global mid-size architecture. This engine received platform-specific adaptations—reinforced subframes in the Vectra and revised cooling in the Zafira—and from 2009 the Euro 5 update introduced new exhaust aftertreatment hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 Z19DT offers strong torque and good efficiency, but early models (2005–2008) had HPFP reliability concerns. Post-2009 revisions significantly improved durability. With proper maintenance—using GM dexos2 oil and EN 590 diesel—and avoiding excessive short trips, the engine can be robust beyond 200,000 km.
Top issues include high-pressure fuel pump wear, DPF clogging from urban use, EGR valve fouling, and turbo actuator sticking. These are documented in Vauxhall TSB‑08‑076 and DVSA emissions data. Regular highway driving and correct fuel/oil mitigate most risks.
The Z19DT powered the Astra H (2005–2011), Zafira B (2005–2011), and Vectra C (2005–2008) in the UK, all as 1.9 CDTI variants with 130–140 PS. It was also used in Opel Astra H across Europe. No other Vauxhall models used this specific 1.9L turbo diesel.
Aftermarket ECU tuning is common on the Z-19-DT platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Real-world consumption is ~6.8 L/100km (city) and ~4.9 L/100km (highway), or ~48 mpg UK combined in the Astra 1.9 CDTI. Aggressive driving reduces this to ~40 mpg, while gentle highway use can reach 55 mpg. DPF regeneration cycles temporarily increase consumption.
Yes. The Z19DT is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is generally robust with proper oil changes and has no widespread failure history like some inline-four diesels.
Vauxhall specifies GM dexos2 (SAE 5W‑30) synthetic oil. This is critical for HPFP lubrication and DPF compatibility. Oil changes should occur every 15,000 km or 12 months. Using non-dexos2 oil risks increased soot, turbo wear, and aftertreatment damage.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.