The Volvo B 4204 T7 is a 1,984 cc, inline‑four petrol engine produced between 2004 and 2007. It features an aluminium block and head, dual overhead camshafts (DOHC), and a twin‑scroll turbocharger with Bosch ME7.0 electronic fuel injection. In standard tune for the S40/V50, it delivered approximately 162 kW (220 PS), offering high performance for Volvo's compact models.
Fitted primarily to the Volvo S40 and V50 (P1 platform), the B 4204 T7 was engineered for sporty, responsive driving while maintaining everyday refinement. Emissions compliance was achieved through precise electronic fuel metering, a three-way catalytic converter, and exhaust gas recirculation (EGR), meeting Euro 4 standards applicable for its production period.
One documented service consideration is the potential for premature failure of the turbocharger’s electronic wastegate actuator, particularly after exposure to moisture. This issue, noted in Volvo Technical Service Bulletin TSB‑05‑08, can lead to boost control faults and limp-home mode. The engine was part of Volvo's modular "B4" family, sharing core architecture with other 2.0L and 2.4L variants.
Production years 2004–2007 meet Euro 4 emissions standards (Swedish Transport Agency Type Approval Records).
The Volvo B 4204 T7 is a 1,984 cc inline‑four petrol engine engineered for compact hatchbacks and sedans (2004-2007). It combines a lightweight aluminium block with a DOHC valvetrain, twin-scroll turbocharging, and Bosch ME7.0 electronic fuel injection to deliver responsive, high-performance power. Designed to meet Euro 4 emissions regulations, it balances sporty character with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 162 kW (220 PS) @ 5,000 rpm | |
| Torque | 320 Nm @ 2,000 rpm | |
| Fuel system | Bosch ME7.0 electronic fuel injection | |
| Emissions standard | Euro 4 | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Twin-scroll turbo (Mitsubishi TD04L-14T) | |
| Timing system | Belt‑driven camshafts | |
| Oil type | SAE 0W‑40 (Synthetic) | |
| Dry weight | Not specified in available OEM docs |
The DOHC turbo design offers strong, flat torque but requires strict adherence to timing belt replacement intervals (every 100,000 km). The aluminium construction is lightweight but sensitive to overheating. Regular oil changes (every 10,000 km) with full synthetic 0W-40 are critical to protect the turbocharger and internals. The electronic wastegate actuator is sensitive to moisture ingress; ensure engine bay seals are intact. The Bosch ME7.0 system is generally reliable but requires precise sensor inputs.
Oil Specs: Requires SAE 0W-40 full synthetic oil (Volvo Workshop Manual 2005). This specification is critical for protecting the high-performance turbocharged engine.
Emissions: Certified to Euro 4 standards for all production years (Swedish Transport Agency).
Power Ratings: Measured under SAE net horsepower standards (Volvo Technical Specification Sheet B4204T7).
Volvo Workshop Manual (2005 Edition)
Volvo EPC Archive Documentation (VEP-B4204-001)
Volvo Technical Service Bulletin TSB-05-08
Swedish Transport Agency (Transportstyrelsen) Type Approval Records
The Volvo B 4204 T7 was used across Volvo's S40/V50 platforms with transverse mounting. This engine was part of the modular B4/B5 family and shared many components with the B5244T7 2.4L variant. Minor ECU and turbo revisions were implemented during its production run, but no major facelifts created significant interchange limits for core mechanical parts. All adaptations are documented in OEM technical bulletins.
The engine code "B4204T7" is typically stamped on a flat pad on the front face of the engine block, near the timing belt cover. The 8th digit of the VIN is often '6' for high-performance 2.0L engines in this platform. Visually, it is identified by its transverse mounting, aluminium construction, prominent twin-scroll turbocharger, and the Bosch ME7.0 ECU. Differentiation from the lower-output B4204T5 is by the engine code stamping and specific ECU calibration.
The B 4204 T7's primary long-term concern is failure of the turbocharger's electronic wastegate actuator, particularly after exposure to road spray or moisture. Volvo TSB-05-08 documented this as a cause of boost control faults leading to limp-home mode. Consistent operation and inspection of engine bay seals are critical for preventing this costly electronic failure.
Analysis derived from Volvo technical bulletins (2004-2008) and workshop manuals (2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-4204-T7.
Comprehensive technical documentation and regulatory references
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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)
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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.
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