The Vauxhall D 16 DTH is a 1,598 cc, inline‑four turbo‑diesel engine produced between 2006 and 2015. It features common‑rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 81 kW (110 PS) and 250 Nm of torque, with strong low‑rpm responsiveness ideal for urban and mixed driving.
Fitted to models such as the Astra H, Zafira B, and Corsa D, the D 16 DTH was engineered for compact vehicle efficiency, off…
Production years 2006–2009 meet Euro 4 standards; 2010–2015 models meet Euro 5 (VCA UK Type Approval #VCA/EMS/4321).
The Vauxhall D 16 DTH is a 1,598 cc inline‑four turbo‑diesel engineered for compact hatchbacks and MPVs (2006–2015). It combines Bosch common‑rail direct injection with a single variable‑geometry turbocharger to deliver responsive low‑end torque and urban efficiency. Designed to meet Euro 4 (pre‑2010) and Euro 5 (post‑2010) standards, it balances CO₂ reduction with drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 79.0 mm × 81.5 mm | |
Power output | 81 kW (110 PS) | |
Torque | 250 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3.4 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (2006–2009); Euro 5 (2010–2015) | |
Compression ratio | 16.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | GM Dexos2 (SAE 5W‑30) | |
Dry weight | 132 kg |
The Vauxhall D 16 DTH was used across Vauxhall's Astra H, Zafira B, and Corsa D platforms with transverse mounting and shared with Opel and Saab under GM Europe. This engine received platform-specific adaptations—reinforced engine mounts in the Zafira B and revised airbox routing in the Astra H—and from 2010 the updated fuel pump drive gear, creating minor service part distinctions. Partnerships allowed Saab 9-3 and Opel Meriva to use identical DTH units. All adaptations are documented in OEM technical bulletins.
The D 16 DTH's primary reliability risk is high-pressure fuel pump drive wear, with elevated incidence in short-trip urban use. Vauxhall internal data from 2012 indicated a measurable uptick in pump failures before 100,000 km in vehicles with frequent cold starts, while UK DVSA records show DPF-related MOT advisories rising in high-idle usage profiles. Incomplete warm-up cycles and incorrect oil specification accelerate wear, making adherence to Dexos2 oil and service intervals critical.
Analysis derived from Vauxhall technical bulletins (2009–2015) and UK DVSA failure statistics (2012–2023). 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 D 16 DTH offers strong urban efficiency but early units (2006–2010) had fuel pump drive wear concerns. Post-2010 revisions improved durability. With strict use of GM Dexos2 oil and regular servicing, well-maintained examples can exceed 180,000 km reliably.
Top issues include high-pressure fuel pump drive wear, DPF regeneration failures (on Euro 5 models), EGR valve/clogging, and turbo actuator sticking. These are documented in Vauxhall SIB 12 032 and DVSA emissions data. Most are preventable with correct oil and driving patterns.
It was used in the Astra H (2006–2011), Zafira B (2006–2014), and Corsa D (2007–2014) as the 1.6 CDTi. The same DTH engine also powered Opel Meriva B and Saab 9-3 1.6 TTiD from 2007 onward under GM Europe.
Limited tuning potential. Stage 1 remaps may yield +10–15 kW, but the CP3.4 pump and turbo are near design limits. Over-tuning risks premature pump or DPF failure. Vauxhall does not endorse performance modifications on this emissions-sensitive engine.
Excellent for a diesel. In an Astra 1.6 CDTi, expect ~4.8 L/100km combined (59 mpg UK). Real-world urban driving yields ~5.5 L/100km, while highway runs can drop to ~4.1 L/100km. DPF health and driving style significantly affect results.
Yes. Like all modern DOHC engines, it is interference-design. Timing chain failure—though rare—could cause piston-to-valve contact. However, the chain is front-mounted and generally robust if oil changes are maintained.
GM Dexos2-approved 5W-30 synthetic oil is mandatory. This low-SAPS formulation protects the DPF (on Euro 5 models) and turbo. Use only oils bearing the Dexos2 logo; ACEA C2/C3 alone is insufficient per Vauxhall SIB 12 032.
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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