The Volvo B 4204 T21 is a 1,969 cc, inline‑four turbocharged petrol engine produced between 2014 and 2019. It features an aluminum block and head, dual overhead camshafts (DOHC), and direct fuel injection (Volvo VEA architecture). This unit delivered 140 kW (190 PS) and 300 Nm of torque, engineered for responsive performance and efficiency in Volvo’s compact executive models.
Fitted to models such as the S60, V60, and XC60 (Drive — E platform), the B 4204 T21 was designed fo…
Production years 2014–2019 meet Euro 6 emissions standards (Swedish Transport Agency Type Approval #STV/B4204/2014).
The Volvo B 4204 T21 is a 1,969 cc inline‑four turbocharged petrol engine engineered for compact executive sedans, wagons, and SUVs (2014-2019). It combines direct fuel injection with a single-scroll turbocharger to deliver strong low-end torque and efficient performance. Designed to meet Euro 6 emissions standards, it balances responsive power delivery with modern fuel economy.
| 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 | 140 kW (190 PS) @ 5,000 rpm | |
Torque | 300 Nm @ 1,800–4,800 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 dual overhead camshafts | |
Oil type | Volvo VCC 95200377 (SAE 0W-20) | |
Dry weight | 130 kg |
The Volvo B 4204 T21 was used across Volvo's SPA/VEA platforms with transverse mounting. This engine received minor ECU and emissions revisions over its lifespan, but core components remain interchangeable. All adaptations are documented in OEM technical bulletins.
The B 4204 T21's primary reliability consideration is a software-related drivetrain disengagement issue under cold-start conditions, addressed in Volvo TSB V-17-003. 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 (2014-2019) and historical workshop manual data. Repair procedures should follow manufacturer guidelines.
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Yes, the B 4204 T21 is generally reliable long-term. Its main known issue is a software-related drivetrain behavior that is resolved with a dealer update. With proper maintenance using the correct oil and adherence to service intervals, this engine can provide excellent longevity and performance.
The most common issues are drivetrain disengagement (resolved by software update), intake valve carbon buildup (causing rough idle), timing chain tensioner wear (rattle on cold start), and turbocharger wastegate rattle. These are well-documented and generally straightforward to address.
The B 4204 T21 was used in the facelifted second-generation S60 and V60 (2015-2018), and the second-generation XC60 (2017-2019). It was marketed as the T4 engine, offering a balance of performance and efficiency below the higher-output T5 and T6 variants.
Yes, significantly. The B4204T21 responds very well to ECU remapping. Stage 1 tunes can reliably increase power to 240-260 PS and torque to 380+ Nm without any hardware modifications, thanks to its robust internals and conservative factory tune.
Fuel economy is good for a turbocharged 2.0L petrol engine. Expect around 7.5-9.0 L/100km (31-38 mpg UK) in mixed driving for an S60 or XC60 T4. Highway cruising can yield closer to 6.0-6.5 L/100km (43-47 mpg UK). Driving style and traffic conditions heavily influence consumption.
No. The B 4204 T21 is a non-interference engine. If the timing chain were to fail or jump, the pistons and valves would not collide, preventing catastrophic internal damage. This is a significant design safety feature.
Volvo specifies a very low-viscosity SAE 0W-20 oil meeting their VCC 95200377 specification. This is critical for the variable valve timing system's operation and overall engine efficiency. Using the correct oil is non-negotiable for optimal performance and longevity. Change oil every 15,000 km or annually.
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
Type-approval guidance and documentation.
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