The Volvo B 4204 T23 is a 1,969 cc, inline‑four turbocharged petrol engine produced between 2015 and 2019. It features a dual overhead camshaft (DOHC) and four valves per cylinder, delivering a blend of efficiency and responsive performance. The engine utilizes direct fuel injection and a single — scroll turbocharger to produce 180 kW (245 PS) and 350 Nm of torque, enabling strong acceleration.
Fitted to the second — generation Volvo XC90, S90, and V90 platforms, the B 4204…
Production years 2015–2019 meet Euro 6 emissions standards across all markets (EU Regulation (EC) No 715/2007 as amended).
The Volvo B 4204 T23 is a 1,969 cc inline‑four turbocharged petrol engine engineered for premium SUVs and executive sedans/wagons (2015-2019). It combines direct fuel injection with a single-scroll turbocharger to deliver strong, linear power and efficient highway cruising. Designed to meet Euro 6 standards from launch, it balances responsive performance with stringent emissions control.
| 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 | 180 kW (245 PS) | |
Torque | 350 Nm @ 1,500–4,800 rpm | |
Fuel system | Direct injection (Bosch HDEV5) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single-scroll turbo (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven camshafts | |
Oil type | Volvo VCC 95200 (SAE 0W-20) | |
Dry weight | 135 kg |
The Volvo B 4204 T23 was used across Volvo's SPA platform with transverse mounting. This engine received minor ECU tuning for different markets, but no major platform-specific adaptations that affect core compatibility. All variants share the same block, head, and mounting points. All adaptations are documented in OEM technical bulletins.
The B 4204 T23's primary reliability risk is PCV check valve failure, with elevated incidence in high-mileage or pre-2017 examples. Volvo internal service data indicated this was a leading cause of oil-related complaints for early production units, while direct injection systems are susceptible to intake valve carbon buildup over time. Strict adherence to oil quality and change intervals is critical for longevity.
Analysis derived from Volvo technical bulletins (2015-2019) and aggregated workshop repair data. 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
Yes, with proper maintenance. The B 4204 T23 is a powerful, efficient engine. The main concern is the PCV check valve in pre-2017 models, which is a known, fixable issue. Regular oil changes with the correct 0W-20 specification and monitoring oil consumption are key to achieving maximum longevity, with many examples surpassing 150,000 km.
The most common issues are PCV check valve failure (addressed in Volvo SB T23-17-09), intake valve carbon buildup (common to all direct-injection engines), turbocharger wastegate rattle, and minor oil leaks from gaskets. These are well-documented in Volvo service literature.
The B 4204 T23 was used in the second-generation Volvo XC90 (2015-2019), and the first-generation S90 (2016-2019) and V90 (2016-2019) models. It was marketed as the T5 trim level, offering a high level of performance and refinement.
Yes, significantly. The B4204T23 responds very well to ECU remapping. Stage 1 tunes can safely increase output to 220-240 kW (300-325 PS) and 420-450 Nm. The stock turbo and internals are robust enough to handle this. Further gains require a larger turbo and supporting modifications.
Expect 8.0–9.5 L/100km (35–30 mpg UK) in mixed driving for an XC90 or S90/V90. Economy is heavily influenced by driving style, tire pressure, and traffic conditions. Highway cruising can yield 7.0 L/100km (40 mpg UK) or better.
Yes. The B 4204 T23 is an interference engine. If the timing chain were to fail or jump, the pistons and valves would collide, causing severe internal engine damage. This underscores the importance of using the correct oil and adhering to maintenance schedules.
Volvo mandates the use of Volvo VCC 95200 specification oil, typically SAE 0W-20. This low-viscosity oil is specifically formulated for the engine's timing chain, turbocharger, and emissions systems. Using the correct oil is non-negotiable for long-term reliability.
Comprehensive technical documentation and regulatory references
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VOLVO 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
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