The Vauxhall Z19DTH is a 1,910 cc, inline‑four turbo‑diesel engine produced between 2006 and 2011. It features a dual overhead camshaft (DOHC) layout with 16 valves, common — rail direct injection, and a variable geometry turbocharger (VGT). In standard form it delivered 96 kW (130 PS) and 320 Nm of torque, providing strong low — end pull and efficient motorway cruising.
Fitted to models such as the Astra H, Zafira B, and Vectra C, the Z19DTH was engineered for drivers seekin…
All production years 2006–2011 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5123).
The Vauxhall Z19DTH is a 1,910 cc inline‑four turbo‑diesel engineered for compact and mid-size models (2006–2011). It combines common-rail direct injection with a variable geometry turbocharger to deliver strong low-RPM torque and efficient cruising. Designed to meet Euro 4 emissions standards, it balances everyday performance with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,910 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 83.0 mm × 88.3 mm | |
Power output | 96 kW (130 PS) @ 4,000 rpm | |
Torque | 320 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable-geometry turbo (Garrett) | |
Timing system | Chain-driven DOHC | |
Oil type | GM Dexos2 5W‑30 (or ACEA C3 equivalent) | |
Dry weight | 158 kg |
The Vauxhall Z19DTH was used across Vauxhall's Astra H, Zafira B, and Vectra C platforms with transverse mounting and shared with Opel under GM's global architecture. This engine received platform-specific adaptations—reinforced engine mounts in the Vectra C and revised DPF housings in facelifted Astra H models—and from 2008 the ECU calibration was updated to improve regeneration logic, creating minor service distinctions. All adaptations are documented in OEM technical bulletins.
The Z19DTH's primary reliability risk is diesel particulate filter (DPF) clogging under frequent short-trip urban use. Vauxhall internal data from 2009 indicated a significant portion of Astra H and Zafira B 1.9 CDTi models required DPF intervention before 100,000 km, while UK DVSA MOT records show elevated emissions-related failures in high-mileage examples. Infrequent highway driving prevents passive regeneration, making proactive maintenance critical.
Analysis derived from Vauxhall technical bulletins (2006–2011) 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 Z19DTH offers strong torque and good economy but is prone to DPF clogging if used only for short urban trips. With regular highway driving and correct oil changes using Dexos2 5W-30, it can exceed 200,000 km. Early models (2006–2007) are more susceptible to fuel pump and EGR issues.
Top issues include DPF clogging, EGR valve/cooler fouling, high-pressure fuel pump wear, and timing chain tensioner wear. These are documented in Vauxhall service bulletins, especially TIS 09-01-06 for DPF and SIB 08-05-04 for fuel system concerns.
It powered the Astra H 1.9 CDTi 130 (2006–2011), Zafira B 1.9 CDTi 130 (2006–2011), and Vectra C 1.9 CDTi 130 (2006–2008). It was also used in Opel Astra H, Zafira B, and Vectra C under GM's shared platform strategy. All are Euro 4 compliant with DPF.
Yes. ECU remaps routinely yield +20–30 kW safely on stage 1, as stock internals handle torque well. Aftermarket upgrades (larger turbo, intercooler) can push further, but DPF removal is illegal in the UK. Tuning should include supporting fuel system upgrades to avoid pump failure.
In an Astra H 1.9 CDTi 130, expect ~6.2 L/100km (city) and ~4.3 L/100km (highway), or about 48 mpg UK combined. Real-world mixed driving typically yields 42–50 mpg (UK), depending on DPF regeneration cycles and driving style.
Yes. The Z19DTH is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic internal damage. However, the chain is robust if oil is changed regularly with correct specification.
Vauxhall specifies GM Dexos2 5W-30 or ACEA C3 equivalent. This low-ash oil minimizes DPF contamination and ensures proper chain lubrication. Change every 10,000–15,000 km maximum.
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
Type-approval guidance and documentation.
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