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 exclusivity. Emissions compliance was achieved through Bosch Motronic 4.4 fuel injection and catalytic converters, meeting Euro 2 standards.
One documented concern is premature failure of the turbocharger wastegate actuator, which can lead to overboost conditions and potential engine damage. This issue, highlighted in Volvo Service Bulletin 3-99126, is often linked to the extreme boost pressures and heat cycling inherent in this high-output variant. Production ended in 2000 with the conclusion of the P80 platform.
Production years 1999–2000 meet Euro 2 standards (VCA UK Type Approval #VCA/VOL/8600).
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 | SAE 10W-40 (semi-synthetic) | |
| Dry weight | 162 kg |
The turbocharged design delivers explosive power ideal for track or spirited road use but requires a 60-second idle cooldown after any aggressive driving to prevent oil coking in the turbo bearings. SAE 10W-40 semi-synthetic oil is mandatory for high-temperature stability. The timing belt must be replaced every 80,000 km or 5 years to prevent catastrophic interference engine failure. Bosch Motronic 4.4 system is pushed to its limits; sensor degradation is accelerated. Turbocharger wastegate actuator failure is a critical documented issue per Volvo SIB 3-99126, leading to dangerous overboost conditions.
Oil Specs: Requires SAE 10W-40 semi-synthetic specification (Volvo Greenbook 1999). Full synthetic 5W-40 may be used if compatible.
Emissions: Euro 2 certification applies to all production years (VCA Type Approval #VCA/VOL/8600).
Power Ratings: Measured under DIN 70020 standards. Output is specific to the ultra-rare S70 R and V70 R AWD models (Volvo Greenbook 1999).
Volvo Greenbook Service Manuals (1999-2000)
VCA Type Approval Database (VCA/VOL/8600)
DIN 70020 Engine Power Measurement Standard
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.
Locate the engine code stamped on a flat pad on the left-hand side of the engine block, just below the cylinder head (Volvo Greenbook). The code will read 'B4204T37'. Critical differentiation from other B4204T variants: The 'T37' suffix denotes the ultra-high-output 220 PS variant with unique ECU mapping, larger turbo, and specific intercooler. Visually, the Garrett GT25 turbocharger, red valve cover, and aggressive intercooler piping are definitive identifiers.
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.
Find answers to most commonly asked questions about VOLVO B-4204-T37.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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