The Volvo B4204T43 is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2007 and 2010. It features an aluminum block and head, dual overhead camshafts (DOHC), and sequential multi — point fuel injection. This unit delivered 127 kW (172 PS) and 270 Nm of torque, offering a compelling blend of efficiency and spirited performance for its class.
Fitted primarily to the S40 and V50 models, the B4204T43 was engineered for responsive, agile driving with an emph…
Production years 2007–2010 meet Euro 4 emissions standards .
The Volvo B4204T43 is a 1,984 cc inline‑four turbocharged petrol engine engineered for compact sedans and wagons (2007-2010). It combines DOHC architecture with turbocharging to deliver responsive, torquey performance. Designed to meet Euro 4 standards, it balances sporty character with everyday drivability and fuel efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 96.0 mm | |
Power output | 127 kW (172 PS) @ 5,000 rpm | |
Torque | 270 Nm @ 1,800–5,000 rpm | |
Fuel system | Sequential multi-point fuel injection | |
Emissions standard | Euro 4 | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett GT1549V with wastegate | |
Timing system | Belt-driven camshafts | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 140 kg (approx.) |
The Volvo B4204T43 was used across Volvo's P1 Platform with transverse mounting. This engine received minor platform-specific adaptations-different engine mounts and accessory brackets between sedan and wagon-and from 2009 the electronic throttle body was revised, creating a key service part distinction. All adaptations are documented in OEM technical bulletins.
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The B4204T43's primary reliability risk is electronic throttle body failure due to carbon buildup, with elevated incidence in vehicles subjected to infrequent oil changes. Volvo service bulletins from the era highlight this as a common cause of drivability complaints, while aggregated repair data consistently shows that replacing the throttle body with the revised part is a highly effective preventative measure for long-term drivability.
Analysis derived from Volvo technical service bulletins (2007-2010) and aggregated data from Volvo Technical Information System (TIS) repair logs (2010-2023). 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, the B4204T43 is a fundamentally reliable and peppy engine, provided the timing belt is replaced on schedule and the electronic throttle body (on pre-2009 engines) is upgraded. Its compact design and robust construction contribute to its longevity. Addressing these two key items makes it an excellent long-term prospect.
The most critical issue is carbon buildup in the electronic throttle body on pre-2009 engines. Other common problems include neglected timing belt replacement, oil leaks from the camshaft seals, and clogging of the turbocharger oil feed line. These are well-documented in period service literature.
The B4204T43 was used exclusively in the first-generation (P1 platform) Volvo S40 sedan and V50 wagon, from 2007 to 2010. It was marketed as the 'T4' engine in these models.
Yes, significant power gains are possible. Common upgrades include an ECU remap, which can unlock 190-210 PS, a larger intercooler, a high-flow exhaust, and an upgraded turbocharger. The engine's low compression ratio and robust internals make it very receptive to tuning.
Fuel economy is reasonable for a turbocharged engine of its performance. Expect around 8.5-10.5 L/100km (27-33 mpg UK) in mixed driving for an S40 T4. Highway cruising can yield up to 6.5-7.5 L/100km (38-43 mpg UK). Aggressive driving will significantly increase consumption.
Yes. The Volvo B4204T43 is an interference engine. If the timing belt breaks or jumps teeth, the pistons will collide with the open valves, causing severe internal damage that typically requires a complete engine rebuild. This makes the 100,000 km belt replacement interval critical.
Volvo specifies SAE 5W-30 engine oil meeting their VCC 95200312 standard. A high-quality fully synthetic 5W-30 oil is essential for protecting the turbocharger and ensuring optimal engine performance. Change the oil and filter every 10,000-15,000 km or annually.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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