The Vauxhall Y23DTH is a 2,260 cc, inline‑four turbo‑diesel engine produced between 2006 and 2013. It features double overhead camshafts (DOHC), 16 valves, common‑rail direct injection, and a variable geometry turbocharger (VGT). In standard form it delivered 110 kW (150 PS) at 4,000 rpm and 320 Nm of torque at 2,000 rpm, offering strong low‑end pull with refined operation.
Fitted to models such as the Vectra C, Signum, and Zafira B, the Y23DTH was engineered for midsize a…
All production years 2006–2013 meet Euro 4 standards .
The Vauxhall Y23DTH is a 2,260 cc inline‑four turbo‑diesel engine engineered for midsize sedans and MPVs (2006–2013). It combines common‑rail direct injection with a variable geometry turbocharger to deliver strong low‑rpm torque and highway refinement. Designed to meet Euro 4 emissions standards, it balances performance with regulatory compliance through EGR and DPF systems.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,260 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 89.0 mm × 90.4 mm | |
Power output | 110 kW (150 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 | Variable geometry turbo (Garrett VNT17) | |
Timing system | Chain‑driven DOHC | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 165 kg |
The Vauxhall Y23DTH was used across Vauxhall's GM Epsilon platform with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Signum and compact accessory drive in the Zafira B—and from 2009 the Vectra C facelift adopted updated HPFP components, creating minor service part interchange limits. All adaptations are documented in OEM technical bulletins.
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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.
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The Y23DTH is generally robust with proper maintenance. Pre-2009 units have HPFP vulnerability, but post-2009 revisions improve durability. With Dexos2 5W-30 oil changes every 15,000 km and use of quality diesel, it can reliably exceed 200,000 km. DPF and EGR systems require attentive driving habits to avoid clogging.
The top issues are HPFP failure (pre-2009), DPF clogging from short trips, EGR valve/cooler fouling, and VNT turbo actuator sticking. These are documented in Vauxhall TSB‑23‑009 and internal service data. None typically cause catastrophic failure if addressed early.
The Y23DTH powered the Vectra C (2006–2008), Signum (2006–2008), and Zafira B (2006–2013) in 2.2 CDTi 150 trim only. It was never used in commercial variants or licensed externally. All units comply with Euro 4 emissions.
Aftermarket ECU tuning is common on the 23-YDT 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.
Good for its class. In a Zafira B 2.2 CDTi, expect ~7.2 L/100km (city), ~5.0 L/100km (highway), or about 45 mpg UK combined. Real-world mixed driving typically returns 40–48 mpg (UK), heavily dependent on DPF regeneration cycles and driving style.
Yes. The Y23DTH is an interference engine. If the timing chain were to fail (rare but possible with severe oil neglect), piston-to-valve contact would cause significant internal damage. However, the chain is designed for life under correct maintenance.
Vauxhall specifies Dexos2 5W-30 (ACEA C3) synthetic oil. Oil changes every 15,000 km or annually are mandatory. Never use non-Dexos2 oils, as they may cause HPFP wear, turbo bearing issues, or DPF clogging due to higher ash content.
Comprehensive technical documentation and regulatory references
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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.
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