The Vauxhall Y 22 DTH is a 2,198 cc, inline‑four turbo‑diesel mild-hybrid engine produced between 2019 and 2023. It features dual overhead camshafts (DOHC), 16 valves, a variable geometry turbocharger (VGT), and a 48V belt-integrated starter generator (BiSG). In standard form it delivered 125 kW (170 PS) at 3,750 rpm and 400 Nm of torque at 1,750 rpm, providing strong low-end response with reduced fuel consumption in urban driving.
Fitted exclusively to the Grandland X Hybrid4, the Y 22 DTH was engineered for refined efficiency with mild-hybrid assistance enabling engine-off coasting and enhanced start-stop functionality. Emissions compliance was achieved through high-pressure common-rail injection, cooled exhaust gas recirculation (EGR), diesel oxidation catalyst, and a diesel particulate filter (DPF), ensuring all units met Euro 6d standards.
One documented concern is premature degradation of the 48V lithium-ion battery pack, which can disable mild-hybrid functions and trigger warning lights. This issue, highlighted in Vauxhall Service Bulletin TIS-20-08-22, is attributed to thermal stress in high-ambient conditions and frequent deep discharge cycles. From 2021, revised battery management software and thermal shielding were introduced to improve service life.
All production years 2019–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9421).
The Vauxhall Y 22 DTH is a 2,198 cc inline‑four turbo‑diesel mild-hybrid engine engineered for compact SUV applications (2019–2023). It combines DOHC 16-valve architecture with a variable geometry turbocharger and 48V belt-integrated starter generator to deliver responsive torque and urban fuel savings. Designed to meet Euro 6d emissions standards, it integrates electrification without compromising diesel efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,198 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 85.0 mm × 97.0 mm | |
| Power output | 125 kW (170 PS) @ 3,750 rpm | |
| Torque | 400 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common-rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (Garrett VNT17) | |
| Timing system | Chain (maintenance-free design) | |
| Oil type | ACEA C3 (SAE 5W‑30) | |
| Dry weight | 178 kg |
The mild-hybrid VGT design provides strong low-end torque with stop-start refinement but requires strict adherence to 15,000 km or 12-month oil change intervals using low-SAPS ACEA C3 oil to protect the DPF and 48V system. The Bosch CP4.2 high-pressure pump demands EN 590-compliant ultra-low-sulfur diesel. The 48V lithium-ion battery is sensitive to thermal cycling; vehicles in hot climates should avoid prolonged parking in direct sun. Post-2021 units include improved battery thermal management per Vauxhall SIB TIS-20-08-22. Regular highway driving (≥30 minutes monthly) is essential to maintain DPF regeneration and 48V system calibration.
Oil Specs: Requires ACEA C3 (5W-30) low-SAPS oil specification (Vauxhall SIB TIS-20-08-22) for DPF and aftertreatment compatibility.
Emissions: Euro 6d certification applies to all model years (VCA Type Approval #VCA/EMS/9421). No earlier variants exist.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all applications (Vauxhall TIS Doc. V19‑5201).
Vauxhall Technical Information System (TIS): Docs V19‑5201, SIB TIS-20-08-22
VCA Type Approval Database (VCA/EMS/9421)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall Y 22 DTH was used exclusively in the Grandland X Hybrid4 platform with transverse mounting and no external licensing. This engine integrates a 48V belt-integrated starter generator (BiSG) for mild-hybrid functionality, requiring specific engine mounts, accessory drive layout, and high-voltage wiring harnesses. From 2021, the 48V battery pack received thermal shielding and updated battery management software, creating minor service part distinctions. 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 V19‑5201). The 8th VIN digit indicates engine displacement ('Y' for 2.2L diesel mild-hybrid). All Y 22 DTH units feature a black plastic cam cover with '2.2 Hybrid4' embossed, dual camshaft pulleys, and a visible 48V BiSG unit on the front accessory drive. Critical differentiation from M9T 724: Y 22 DTH includes 48V mild-hybrid system with DC-DC converter and high-voltage battery; M9T 724 is conventional diesel. Service parts for 48V components differ pre/post 2021 due to thermal management updates (Vauxhall SIB TIS-20-08-22).
The Y 22 DTH's primary reliability risk is 48V lithium-ion battery degradation, with elevated incidence in high-ambient temperature regions and frequent short-trip use. Vauxhall internal data from 2022 noted increased hybrid system disablement complaints on Grandland X vehicles under 40,000 km in southern European fleets, while UK DVSA MOT records show DPF-related emissions failures as a secondary concern in urban-driven examples. Thermal stress and infrequent full charging cycles accelerate battery wear, making climate-aware parking and mixed driving critical.
Analysis derived from Vauxhall technical bulletins (2019–2022) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL Y-22-DTH.
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