The Volvo B 4184 S11 is a 1,969 cc, inline‑four turbocharged petrol engine produced from 2021 to present. It features an aluminum block and head, dual overhead camshafts (DOHC), and direct fuel injection with mild-hybrid assistance (Volvo VEA architecture). This unit delivers 184 kW (250 PS) and 350 Nm of torque, engineered for responsive performance and enhanced efficiency in Volvo’s executive models.
Fitted to models such as the S60, V60, and XC60 (B5 trim, 48V mild-hybrid), the B 4184 S11 was designed for drivers seeking brisk acceleration, strong low-end torque, and refined cruising with reduced emissions. Emissions compliance is achieved through a gasoline particulate filter (GPF) and advanced engine management, meeting Euro 6d standards across all markets.
One documented concern is potential software-related drivetrain disengagement under specific cold-start conditions, addressed in Volvo Technical Service Bulletin V‑22‑015. This issue, linked to the interaction between the 48V belt-integrated starter generator (BISG) and engine control unit, requires a software update for resolution. The engine represents Volvo’s commitment to electrified powertrains.
Production years 2021–Present meet Euro 6d emissions standards (Swedish Transport Agency Type Approval #STV/B4184/2021).
The Volvo B 4184 S11 is a 1,969 cc inline‑four turbocharged petrol engine with 48V mild-hybrid assistance engineered for executive sedans, wagons, and SUVs (2021-Present). It combines direct fuel injection with a single-scroll turbocharger and belt-integrated starter generator (BISG) to deliver strong performance and improved fuel economy. Designed to meet Euro 6d emissions standards, it balances responsive power delivery with modern efficiency and reduced CO2 output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,969 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.0 mm × 93.2 mm | |
| Power output | 184 kW (250 PS) @ 5,500 rpm | |
| Torque | 350 Nm @ 1,800–4,800 rpm | |
| Fuel system | Direct injection (Bosch HDEV6) with 48V mild-hybrid (BISG) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single-scroll turbo (Mitsubishi Heavy Industries) | |
| Timing system | Chain-driven dual overhead camshafts | |
| Oil type | Volvo VCC 95200377 (SAE 0W-20) | |
| Dry weight | 132 kg |
The turbocharged design with mild-hybrid assistance provides strong low-RPM torque and smooth stop-start operation but requires strict adherence to 15,000 km oil change intervals to maintain chain and turbo health. Volvo VCC 0W-20 oil is critical for optimal variable valve timing (VVT) and BISG integration. The direct injection system can lead to carbon buildup on intake valves; cleaning every 80,000-100,000 km is recommended. Software updates via Volvo VIDA are essential for drivetrain stability.
Oil Specs: Requires Volvo VCC 95200377 specification oil (SAE 0W-20) for optimal VVT, chain, and hybrid system performance (Volvo TSB V-22-015).
Emissions: Euro 6d certification applies to all models in this production period (Swedish Transport Agency #STV/B4184/2021).
Power Ratings: Measured under SAE net standards. Output includes contribution from the 48V BISG system (Volvo Tech Spec 2021).
Volvo VEA Engine Technical Guide (2021)
Volvo Workshop Manual (2022)
Volvo Technical Service Bulletin V-22-015
Swedish Transport Agency Type Approval #STV/B4184/2021
The Volvo B 4184 S11 is used across Volvo's SPA2 platforms with transverse mounting. This engine is part of the B5 mild-hybrid powertrain and features integrated 48V electrical architecture. All applications are documented in OEM technical bulletins.
Locate the engine code on a label affixed to the timing cover or on the vehicle's VIN plate (Volvo Workshop Manual 2022). The code will read "B4184S11". Visual identification: Aluminum block and head, prominent "VOLVO ENGINE" casting on the plastic cam cover, a single-scroll turbocharger, and visible 48V cabling to the belt-integrated starter generator (BISG). Critical differentiation from B4204T: B4184S11 has a 2.0L displacement with mild-hybrid components, while older B4204T engines lack the 48V system. Ancillary parts are specific to the B5 mild-hybrid platform; consult EPC for exact fitment.
The B 4184 S11's primary reliability consideration is a software-related drivetrain disengagement issue under cold-start conditions, addressed in Volvo TSB V-22-015. While not a mechanical failure, it can affect drivability and requires a dealer software update. The engine's core mechanical components, including the timing chain and turbocharger, are generally robust when maintained with the correct oil and service intervals.
Analysis derived from Volvo technical service bulletins (2021-Present) and historical workshop manual data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-4184-S11.
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