The CADILLAC B207R is a 1,998 cc, inline — three turbocharged petrol engine produced between 2020 and 2025. It features DOHC, 12 — valve configuration, and General Motors' TwinBoost technology, delivering 125 kW (170 PS) and 280 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 CT4, the B207R was engineered for responsive urban driving and ever…
Cadillac
All production years 2020–2025 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/6792).
The CADILLAC B207R 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 TwinBoost 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 | 280 Nm @ 1,350–4,000 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 | GM dexos1 Gen 3 (SAE 5W-30) | |
Dry weight | 148 kg |
The CADILLAC B207R was used across CADILLAC's GT4 and CT4 platforms with transverse mounting. This engine received platform-specific adaptations-integrated 48V starter-generator on the XT4 and revised intake manifolds on the CT4-and from 2025 the facelifted XT4 LCI adopted the B38TU variant with updated engine management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The B207R's primary reliability risk is turbocharger actuator wear on pre-2022 builds, with elevated incidence in stop-start urban use. Internal GM reports from 2021 indicated a significant number of pre-upgrade actuators failing before 100,000 km, while UK DVSA records show boost-related failures were common in city-driven examples. Frequent short trips and aggressive driving increase thermal stress, making cooling system maintenance and use of correct oil critical.
Analysis derived from GM technical bulletins (2020–2025) and UK DVSA failure statistics (2021–2024). 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 B207R 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 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 B207R was used in the XT4 (2020–2025) and CT4 (2021–2025). It was replaced by the B38TU in 2025 with updated engine management and modular architecture. No cross-manufacturer applications are documented for this variant.
Yes. The B207R responds well to tuning. Stage 1 ECU remaps can gain ~25–40 kW safely, leveraging the robust turbocharged architecture. Upgraded turbo, intercooler, and fuel system allow further gains. Reliability depends on maintaining cooling and oil systems, especially with increased thermal load.
In an XT4, combined consumption is ~8.2 L/100km (34 mpg UK). City driving may see 10–12 L/100km (28–23 mpg), while highway cruising can achieve ~6.5 L/100km (43 mpg). Real-world figures depend on driving style and vehicle condition.
Yes. The B207 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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CADILLAC Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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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