The CADILLAC B207L is a 1,998 cc, turbocharged inline-four petrol engine produced from 2021 onwards. It features dual overhead camshafts (DOHC), direct fuel injection, and variable valve timing (VVT), delivering responsive performance and improved efficiency. In standard tune it produces 172 kW (234 PS) with 350 Nm of torque, forming part of General Motors' LTG engine family.
Fitted to models such as the CT4-V and CT5-V, the B207L was engineered for sport-oriented applications requiring strong low-end torque and dynamic driving dynamics. Emissions compliance is achieved through precise air-fuel control and oxygen sensing, allowing all units to meet Tier 2 Bin 5 emissions standards (EPA Certificate #EPA-ENG-9201) and Euro 6d standards (VCA UK Type Approval #VCA/EMS/9201).
One documented concern is potential high-pressure fuel pump wear, highlighted in General Motors Service Information Bulletin 21-NA-004. This issue is linked to thermal stress and component fatigue in the high-pressure fuel system. In 2023, GM introduced a revised pump calibration and updated cooling routing to improve durability, marking a key update within the engine's production run.
Cadillac
All production years (2021–present) meet both EPA Tier 2 Bin 5 and Euro 6d standards (EPA Certificate #EPA-ENG-9201, VCA Type Approval #VCA/EMS/9201).
The CADILLAC B207L is a 1,998 cc turbocharged inline-four petrol engine engineered for performance models (2021–present). It combines direct fuel injection with twin-scroll turbocharging and variable valve timing to deliver responsive low-end torque and linear power delivery. Designed to meet Tier 2 Bin 5 and Euro 6d emissions standards, it balances efficiency with driving engagement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 86.0 mm × 85.6 mm | |
| Power output | 172 kW (234 PS) @ 5,500 rpm | |
| Torque | 350 Nm @ 3,000–4,000 rpm | |
| Fuel system | Direct injection with port assist (High Precision Injection) | |
| Emissions standard | Tier 2 Bin 5 / Euro 6d | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbocharger (BorgWarner) | |
| Timing system | Dual-row roller chain (non-interference design) | |
| Oil type | GM dexos1 Gen 3 (SAE 0W-20) | |
| Dry weight | 145 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for performance driving but requires strict adherence to 15,000 km oil change intervals to prevent high-pressure fuel pump and turbo bearing wear. GM dexos1 Gen 3 (0W-20) oil is essential due to its thermal stability and protection of direct injection components. Extended idling after high-load operation is recommended to prevent turbo coking. The high-pressure fuel pump is sensitive to heat; use of OEM-specified coolant and timely replacements per SIB 21-NA-004 minimizes failure risk. Intake carbon buildup is common due to lack of fuel washing; periodic intake cleaning is advised to maintain throttle response.
Oil Specs: Requires GM dexos1 Gen 3 (0W-20) specification (GM Service Manual 2021-0123). Supersedes API SP requirements.
Emissions: Certified to both EPA Tier 2 Bin 5 and Euro 6d standards (EPA #EPA-ENG-9201, VCA #VCA/EMS/9201).
Power Ratings: Measured under SAE J1349 standards. 172 kW output requires 93 AKI (87 RON) fuel (GM TIS Doc. 2021-ENG-LTG).
General Motors Technical Information System (TIS): Docs 2021-ENG-LTG, SIB 21-NA-004
EPA Engine Certificate #EPA-ENG-9201
VCA Type Approval Database (VCA/EMS/9201)
SAE International: J1349 Engine Power Certification Standards
The CADILLAC B207L was used across CADILLAC's CTx platforms with longitudinal mounting. This engine received platform-specific adaptations-shortened intake manifolds in the CT4 and revised cooling routing in the CT5-and from 2023 the facelifted CT4-V models adopted updated VVT calibration, creating minor software differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the exhaust manifold (GM TIS A25100). The 8th digit of the VIN indicates engine family ('L' for B207 series). Pre-2023 models have silver valve covers with black gasket seals; post-2023 units use black valve covers. Critical differentiation from LTG: Original B207L has Bosch MSB9.3 ECU with 100-pin connector, while LTG uses MSB9.2 with 80-pin. Service parts require production date verification—high-pressure fuel pumps before 09/2022 are incompatible with later revisions due to internal redesign (GM SIB 21-NA-004).
The B207L's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in high-load driving with frequent short trips. Internal GM quality reports from 2022 indicated a significant share of pre-2023 engines required pump replacement before 80,000 km, while NHTSA field reports show fuel system faults contributing to emissions-related failures. Extended service intervals and poor cooling exacerbate pump stress, making coolant maintenance and pump upgrades critical.
Analysis derived from GM technical bulletins (2021–2024) and NHTSA field reports (2022–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC B207L.
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