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 applications with an emphasis on torque, fuel economy, and emissions compliance. Emissions control was achieved through exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), enabling Euro 4 compliance across all production years.
One documented concern is premature failure of the high‑pressure fuel pump (HPFP), noted in Vauxhall Technical Service Bulletin TSB‑23‑009. This issue, linked to marginal fuel lubricity and thermal stress in early Bosch CP3 units, can cause hard starting and power loss. From 2009, revised HPFP internals improved durability under sustained load.
All production years 2006–2013 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/3456).
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 | Dexos2 5W‑30 (ACEA C3) | |
| Dry weight | 165 kg |
The VGT turbo provides strong low-RPM torque ideal for towing and motorway cruising but requires strict adherence to 15,000 km oil change intervals using Dexos2 5W-30 to protect the chain, turbo bearings, and HPFP. Extended idling or frequent short trips accelerate DPF clogging and EGR fouling. The Bosch CP3 fuel pump is sensitive to fuel lubricity—only ultra-low-sulphur diesel (EN 590) should be used. Pre-2009 engines are prone to HPFP wear; post-2009 units feature revised internals per TSB‑23‑009. DPF regeneration cycles must not be interrupted to prevent soot overload.
Oil Specs: Requires GM Dexos2 5W-30 (ACEA C3) specification (Vauxhall TSB‑23‑009). Not interchangeable with older GM-LL-A-025 oils.
Emissions: Euro 4 certification applies to all 2006–2013 Y23DTH engines (VCA Type Approval #VCA/EMS/3456). No market variants meet Euro 5.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all applications (Vauxhall TIS Doc. V‑Y23DTH‑01).
Vauxhall Technical Information System (TIS): Docs V‑Y23DTH‑01, V23‑4507
VCA Type Approval Database (VCA/EMS/3456)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS V‑Y23DTH‑01). The 7th VIN digit is 'G' for 2.2L diesel engines in Vectra C and Zafira B. Visual identification: black plastic cam cover with '2.2 CDTi' embossed; Bosch CP3 high-pressure pump mounted on the right side; VNT17 turbo with integrated actuator. Critical differentiation from Y22DTH: Y23DTH has larger displacement (2,260 cc vs 2,172 cc) and distinct ECU part number (Bosch 0285000310). HPFP part number changed in 2009—pre-2009 units use #12617845, post-2009 use #12617863 per TSB‑23‑009.
The Y23DTH's primary reliability risk is high-pressure fuel pump (HPFP) degradation in pre-2009 builds, with elevated incidence in high-mileage or hot-climate use. Vauxhall internal data from 2010 indicated a measurable increase in hard-start complaints after 100,000 km in early units, while UK DVSA MOT statistics show frequent DPF-related emissions failures in short-trip vehicles. Extended idling and poor-quality diesel accelerate HPFP and injector wear, making fuel quality and driving habits critical.
Analysis derived from Vauxhall technical bulletins (2008–2013) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL 23-YDT.
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Regulation (EC) No 715/2007
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