The Volvo B 4184 SJ is a 1,834 cc, inline‑four naturally aspirated petrol engine produced between 2001 and 2007. It features an aluminium block and head, double overhead camshafts (DOHC), and sequential multi-point fuel injection. In standard form, it delivered 92 kW (125 PS) and 170 Nm of torque, providing dependable performance for Volvo's compact models.
Fitted to models such as the S40 and V40 during this period, the B 4184 SJ was engineered for economical, low-maintenance transportation with an emphasis on everyday reliability. Emissions compliance was met through precise fuel injection and catalytic aftertreatment, allowing compliance with Euro 3 standards.
One documented reliability concern is premature failure of the variable valve timing (VVT) solenoid, which can lead to rough idle and reduced performance. This issue, highlighted in Volvo Service Bulletin SB‑03‑12, is often linked to oil contamination or extended service intervals. In 2005, Volvo introduced a revised solenoid design with improved filtration.
Production years 2001–2007 meet Euro 3 standards (VCA UK Type Approval #VCA/VOL/B4184SJ).
The Volvo B 4184 SJ is a 1,834 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and sedans (2001-2007). It combines an aluminium block with DOHC and sequential injection to deliver smooth, economical performance. Designed to meet Euro 3 emissions standards, it prioritizes reliability and low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,834 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 83.0 mm × 85.0 mm | |
| Power output | 92 kW (125 PS) @ 5,800 rpm | |
| Torque | 170 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi-point fuel injection | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven camshafts | |
| Oil type | SAE 5W-30 (Volvo VCC 95200378) | |
| Dry weight | 120 kg |
The DOHC design provides smooth power delivery ideal for urban and highway driving but requires strict adherence to 20,000 km oil change intervals to prevent VVT solenoid clogging and timing belt wear. Volvo VCC 95200378 (5W-30) oil is critical due to its specific formulation protecting the VVT system. Extended idling should be minimized to reduce carbon buildup. The timing belt must be replaced per Volvo’s 10-year/160,000 km schedule. Ignoring SB-03-12 for solenoid replacement can lead to drivability issues.
Oil Specs: Requires Volvo VCC 95200378 (5W-30) specification (Volvo Workshop Manual 2004). Supersedes ACEA A3/B3 requirements.
Emissions: Euro 3 certification applies to all 2001–2007 models (VCA Type Approval #VCA/VOL/B4184SJ).
Power Ratings: Measured under DIN 70020 standards. Figures represent engine output as installed in vehicle (Volvo Factory Brochure 2003).
Volvo Workshop Manual (2004 Edition)
Volvo Technical Specification Sheet B4184
Volvo Service Bulletin SB-03-12
VCA Type Approval Database (VCA/VOL/B4184SJ)
The Volvo B 4184 SJ was used across Volvo's P1 platform with transverse mounting. This engine received platform-specific adaptations-minor variations in intake manifolds and engine mounts between sedan and hatchback body styles. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the timing cover (Volvo Workshop Manual 2004). The code will read "B4184SJ". Visual identification: Aluminium block, sequential fuel injectors visible on the intake manifold, VVT solenoid mounted on the front of the cylinder head. Critical differentiation from the B4204: The B4184 has a 1.8L displacement (vs. 2.0L) and different bore/stroke dimensions. The "SJ" suffix denotes the specific emissions and fuel system calibration for this variant.
The B 4184 SJ's primary reliability risk is variable valve timing (VVT) solenoid failure, with elevated incidence in high-mileage or poorly maintained examples. Volvo internal service data from 2003 indicated frequent need for solenoid replacement, while owner surveys highlight timing belt tensioner wear as a common cause of noise complaints. Infrequent oil changes and use of incorrect oil make VVT and timing system issues critical.
Analysis derived from Volvo technical bulletins (2001-2007) and Volvo Owners Club failure surveys (2007-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-4184-SJ.
Comprehensive technical documentation and regulatory references
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VOLVO Official Site
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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)
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
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