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 H…
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 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.
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.
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The Y 22 DTH offers strong torque and mild-hybrid efficiency but requires climate-conscious use. Its chain-driven valvetrain is robust, but the 48V battery is sensitive to heat and short trips. Using ACEA C3 oil, high-quality diesel, and completing regular highway runs helps prevent most issues. Post-2021 revisions improved battery thermal management.
Top issues include 48V battery degradation, DPF regeneration failure, EGR valve clogging, and CP4.2 pump wear. These are documented in Vauxhall service bulletins, especially TIS-20-08-22. Most are preventable with quality diesel, correct oil, and mixed driving patterns.
It was used exclusively in the Grandland X Hybrid4 (2019–2023) with 170 PS output. This is an in-house Vauxhall/Opel mild-hybrid diesel. All variants meet Euro 6d emissions standards per VCA approval.
Modest gains are possible via ECU remap (+10–15 kW), but the 48V system and DPF limit potential. Over-tuning risks premature pump or battery stress. Most owners prioritise reliability over tuning due to the engine’s hybrid orientation.
In a Grandland X 2.2 Hybrid4, typical consumption is ~6.2 L/100km (city) and ~4.8 L/100km (highway), or about 49 mpg UK combined. Real-world figures range 44–54 mpg (UK) depending on driving style and hybrid system usage.
Yes. The Y 22 DTH is an interference engine. However, it uses a durable timing chain with no scheduled replacement. Chain failure is rare, but if it occurs, valve-to-piston contact can cause major damage.
Vauxhall specifies ACEA C3 (SAE 5W‑30) low-SAPS diesel-rated oil. This is critical for protecting the DPF and 48V aftertreatment system. Change intervals should not exceed 15,000 km or 12 months, especially in severe service.
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