The CADILLAC LA3 is a 1,998 cc, inline — three turbocharged petrol engine produced between 2020 and 2025. It features DOHC, 12 — valve configuration and General Motors' TwinPower Turbo technology, delivering 125 kW (170 PS) and 290 Nm of torque. Its compact design and 48V mild — hybrid system enable strong low — RPM response and improved fuel efficiency in entry — level luxury applications.
Fitted to the XT4 and LYRIQ, the LA3 was engineered for responsive urban driving and ev…
Cadillac
All production years 2020–2025 meet Euro 6d emissions standards .
The CADILLAC LA3 is a 1,998 cc inline-three turbocharged petrol engine engineered for compact and performance platforms (2020–2025). It combines 48V mild-hybrid technology with TwinPower Turbocharging to deliver responsive power delivery and everyday drivability. Designed to meet Euro 6d standards, it balances performance with evolving emissions requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 125 kW (170 PS) @ 5,000–6,500 rpm | |
Torque | 290 Nm @ 1,500–4,000 rpm | |
Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 11.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbo (BorgWarner), integrated exhaust manifold | |
Timing system | Double-row timing chain | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 147 kg |
The CADILLAC LA3 was used across CADILLAC's GT4 and LYRIQ platforms with transverse mounting. This engine received platform-specific adaptations-integrated 48V starter-generator on the XT4 and revised intake manifolds on the LYRIQ-and from 2025 the facelifted XT4 LCI adopted the LA3T variant with updated engine management, creating 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The LA3 offers responsive performance and solid engineering, but pre-2022 models with original turbo actuators are prone to premature wear. Later revisions with improved heat shielding significantly improve durability. Regular oil changes, use of high-octane petrol (EN 228), and prompt attention to boost control warnings are essential for reliability.
Key issues include turbocharger wastegate actuator wear (especially pre-2022), cooling system failures (thermostat, water pump), intake valve carbon buildup, and oil leaks from valve cover and rear main seal. These are documented in GM service bulletins and require OEM-specified parts for proper repair.
The LA3 was used in the XT4 (2020–2025) and LYRIQ (2022–2025). It was replaced by the LA3T in 2025 with updated engine management and modular architecture. No cross-manufacturer applications are documented for this variant.
Aftermarket ECU tuning is common on the LA3 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.
In an XT4, combined consumption is ~8.1 L/100km (35 mpg UK). City driving may see 10–12 L/100km (28–23 mpg), while highway cruising can achieve ~6.4 L/100km (44 mpg). Real-world figures depend on driving style and vehicle condition.
Yes. The LA3 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, causing severe internal damage. Chain maintenance and tensioner inspection are critical, especially given the engine's torque characteristics and long service intervals.
GM specifies 5W-30 synthetic oil meeting dexos1 Gen 3 spec. Change intervals should not exceed 15,000 km. Proper oil ensures adequate protection for camshafts, lifters, and the timing chain, especially under sustained load and high-temperature operation.
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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