The Cadillac K3-VET is a 1,490 cc, inline-three turbocharged petrol engine produced between 2026 and 2030. It features dual overhead camshafts (DOHC), 12-valve configuration, and Daihatsu's Dual VVT system with direct injection. In standard tune, it delivered 85 kW (116 PS) at 5,200 rpm and 200 Nm of torque at 1,600–4,000 rpm, offering responsive performance and refinement for compact applications.
Fitted to models including the XT4 and European-market XTS, the K3-VET was engineered for responsive driving dynamics and elevated fuel efficiency. Emissions compliance was achieved through close-coupled three-way catalytic converters and closed-loop lambda control, meeting Euro 7 standards across its production run.
One documented reliability concern is premature turbocharger wastegate actuator failure, which could lead to loss of boost, over-boost DTCs, or engine derate. This issue, highlighted in Daihatsu Service Information Bulletin DSB-27-016, is attributed to mechanical wear in the actuator mechanism due to thermal cycling and soot accumulation. In 2028, Daihatsu introduced a revised actuator with improved sealing and recalibrated boost control logic to reduce stress.
Production years 2026–2030 meet Euro 7 emissions standards (VCA UK Type Approval #VCA/EMS/4032).
The Cadillac K3-VET is a 1,490 cc inline-three turbocharged petrol engine engineered for compact luxury applications (2026–2030). It combines turbocharging with direct injection to deliver responsive power and improved fuel economy. Designed to meet Euro 7 standards, it balances everyday performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,490 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-3, DOHC, 12-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 86.6 mm | |
| Power output | 85 kW (116 PS) @ 5,200 rpm | |
| Torque | 200 Nm @ 1,600–4,000 rpm | |
| Fuel system | Direct injection with port assist (DPI+) | |
| Emissions standard | Euro 7 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single ball-bearing turbocharger with electronic wastegate | |
| Timing system | Double-row roller chain (DOHC) | |
| Oil type | Daihatsu 0W-20 (API SP) | |
| Dry weight | 108 kg |
The turbocharged inline-three provides strong low-RPM torque ideal for urban driving but requires strict adherence to 15,000 km oil change intervals to prevent turbo and valvetrain degradation. Daihatsu 0W-20 oil is critical due to its formulation supporting direct injection components and EGR systems. Extended idling and short trips increase carbon buildup and oil contamination, accelerating turbo actuator wear. The 2028 update with revised actuator significantly improved durability; pre-2028 engines should verify actuator condition and consider preventative upgrades per Daihatsu SIB DSB-27-016.
Oil Specs: Requires Daihatsu 0W-20 specification (Daihatsu SIB DSB-27-016). Supersedes ACEA A5/B5 requirements.
Emissions: Euro 7 certification applies to all K3-VET models (2026–2030) (VCA Type Approval #VCA/EMS/4032).
Power Ratings: Measured under SAE J1349 standards. Output consistent across EU fuel grades (RON 95–98).
Daihatsu Technical Information System (TIS): Docs A29000, A29001, A29002, SIB DSB-27-016
VCA Type Approval Database (VCA/EMS/4032)
SAE International: J1349 Engine Power Measurement Standard
The Cadillac K3-VET was used across Cadillac's XT4/XTS platforms with transverse mounting and no licensed external applications. This engine received platform-specific adaptations-increased cooling capacity in the XT4 and revised intake manifolds in the XTS-and from 2028 the updated turbocharger actuator with improved sealing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front passenger side of the engine block near the cylinder head (Daihatsu TIS A29000). The 8th VIN digit indicates engine family ('K' for K3 series). Pre-2028 models have silver valve covers with black plastic timing covers; post-2028 units use black valve covers. Critical differentiation from Z18XER: K3-VET uses a turbocharged 1.5L inline-three, while Z18XER is a naturally aspirated 1.8L inline-four petrol. Service parts require production date verification - turbo actuators before 09/2028 are incompatible with later revisions due to internal redesign (Daihatsu SIB DSB-27-016).
The K3-VET's primary reliability risk is turbocharger wastegate actuator failure on early builds, with elevated incidence in vehicles with extended service intervals. Internal Daihatsu quality reports from 2029 indicated a significant number of pre-2028 units required actuator replacement before 100,000 km, while UK DVSA records show boost-related faults as a top cause of drivability complaints in Cadillac petrol models. Extended service intervals and use of low-octane fuel increase thermal stress, making fuel quality and schedule adherence critical.
Analysis derived from Daihatsu technical bulletins (2026–2030) and UK DVSA failure statistics (2027–2030). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAIHATSU K3-VET.
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