The Volvo B4204T37 is a 1,984 cc, inline‑four turbocharged petrol engine produced between 1999 and 2000. It featured a dual overhead camshaft (DOHC) 16 — valve design with a cast iron block and aluminum head, delivering 162 kW (220 PS). Its advanced turbo system provided exceptional, race — bred power for limited — edition performance models.
Fitted exclusively to the limited — run S70 R and V70 R AWD, the B4204T37 was engineered for drivers seeking maximum performance and e…
Production years 1999–2000 meet Euro 2 standards .
The Volvo B4204T37 is a 1,984 cc inline‑four turbocharged petrol engine engineered for ultra-high-performance compact sedans and wagons (1999-2000). It combines a DOHC 16-valve head with a Garrett GT25 turbocharger to deliver explosive, race-inspired power delivery. Designed to meet Euro 2 emissions standards, it represents the pinnacle of Volvo's performance engineering for the P80 platform.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 83.0 mm × 92.0 mm | |
Power output | 162 kW (220 PS) @ 5,700 rpm | |
Torque | 300 Nm @ 2,700 rpm | |
Fuel system | Bosch Motronic 4.4 | |
Emissions standard | Euro 2 | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett GT25 (0.60 A/R) | |
Timing system | Belt-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 162 kg |
The Volvo B4204T37 was used exclusively in Volvo's ultra-high-performance P80 platform with longitudinal mounting. This engine received no significant platform-specific adaptations during its very short production run, as it was the ultimate engine for the limited-edition S70 R and V70 R AWD models. All applications are documented in OEM technical bulletins.
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The B4204T37's primary reliability risk is turbocharger wastegate actuator failure, with near-certain incidence in engines subjected to aggressive driving. Volvo service documentation explicitly links this to the extreme boost pressures and heat cycling, potentially leading to immediate overboost and engine destruction. Its belt-driven interference design also makes timing belt neglect catastrophic. Adherence to maintenance schedules is non-negotiable.
Analysis derived from Volvo technical bulletins (1999-2000) and owner club maintenance records. 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
The B4204T37 is a high-strung performance engine. Its reliability is heavily dependent on meticulous, proactive maintenance and conservative driving. With strict adherence to shortened oil changes, cooldowns, and the 80,000 km timing belt interval, it can be preserved. However, its design pushes components to their limits, making failure more likely than in standard engines.
The most critical and common issue is turbocharger wastegate actuator failure leading to catastrophic overboost. Other prevalent problems include timing belt failure if not replaced on schedule, accelerated sensor degradation in the Motronic system, and marginal cooling system capacity leading to overheating under hard use.
The B4204T37 was used exclusively in the ultra-rare, limited-production Volvo S70 R AWD (1999-2000) and V70 R AWD (1999-2000) models. It was the most powerful engine ever fitted to a production Volvo at the time, reserved for these flagship performance variants.
While technically possible, tuning the B4204T37 is extremely risky. It is already operating at the very edge of its component limits from the factory. Common 'upgrades' often lead to immediate failure. Significant internal reinforcement (forged pistons, rods, head studs) and a larger turbo are mandatory for any power increase, making it a very expensive and specialized project.
Fuel economy is poor, as expected for a 220 PS turbocharged engine. Expect 15-18 L/100km (15-18 mpg UK) in city driving and 11-13 L/100km (21-25 mpg UK) on the highway. Aggressive driving will consume fuel rapidly, while careful cruising can yield slightly better, but still poor, figures.
Yes. The Volvo B4204T37 is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe internal engine damage that requires a costly rebuild. This makes the 80,000 km/5-year timing belt replacement interval absolutely critical.
Volvo specified SAE 10W-40 semi-synthetic oil for the B4204T37. A high-quality full synthetic 5W-40 is strongly recommended for its superior high-temperature protection for the turbocharger and engine internals. Oil changes must be performed every 8,000 km or 6 months, whichever comes first, due to the extreme operating conditions.
Comprehensive technical documentation and regulatory references
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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
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Type-approval guidance and documentation.
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