The Renault S8U 750 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2001 and 2006. It features a Bosch VP44 rotary injection pump, wastegate — controlled turbocharging, and a cast — iron block with aluminium head. In standard form it delivered 85 kW (115 PS) and 270 Nm of torque, offering strong low — end pull for its era.
Fitted to models such as the Laguna II (B56), Espace III (JE), and Trafic II (FC), the S8U 750 was engineered for robustness in both passenger an…
All production years (2001–2006) meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault S8U 750 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size sedans, MPVs, and light vans (2001–2006). It combines a Bosch VP44 rotary injection pump with a wastegate turbocharger to deliver strong low‑rpm torque and towing capability. Designed to meet Euro 3 standards, it balances durability with moderate fuel economy for its class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged (wastegate) | |
Bore × stroke | 86.0 mm × 94.0 mm | |
Power output | 85 kW (115 PS) | |
Torque | 270 Nm @ 2,000 rpm | |
Fuel system | Bosch VP44 rotary injection pump | |
Emissions standard | Euro 3 | |
Compression ratio | 18.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett T25 with mechanical wastegate | |
Timing system | Chain (front‑mounted) | |
Oil type | ACEA B3/B4 (SAE 10W‑40) | |
Dry weight | 198 kg |
The Renault S8U 750 was used across Renault's B56/JE/FC platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced sump in the Trafic and revised cooling in the Espace—and from 2003 the Laguna II Phase 2 adopted updated EGR routing, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The S8U 750's primary reliability risk is Bosch VP44 injection pump failure, with elevated incidence in regions using low-lubricity diesel. Renault internal service data (2004) indicated pump replacements in over 15% of high-mileage units before 150,000 km, while UK DVSA records show EGR-related emissions faults in urban-driven examples. Extended idling and infrequent filter changes increase contamination risk, making fuel quality and maintenance critical.
Analysis derived from Renault technical bulletins (2001–2006) and UK DVSA failure statistics (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
The S8U 750 is mechanically robust but highly dependent on fuel quality. Early failures are usually tied to VP44 pump issues from contaminated or low-lubricity diesel. With strict adherence to fuel filter changes and use of quality diesel, many engines exceed 250,000 km. Regular oil changes and EGR maintenance are also essential for longevity.
The top issues are Bosch VP44 injection pump failure, EGR clogging, turbo oil leaks, and glow plug controller faults. These are well-documented in Renault Technical Note 77 12 01 00 P and TIS service procedures. Fuel system sensitivity is the dominant concern across all applications.
The S8U 750 powered the Laguna II (2001–2006), Espace III (2001–2003), and Trafic II (2001–2006), all badged as dCi 115. It was not used in Clio, Mégane, or Scénic. No cross-manufacturer licensing occurred; this engine was exclusive to Renault Group vehicles.
Limited tuning potential exists due to the mechanical VP44 pump. Power gains require pump recalibration or replacement with a higher-output unit, but this increases failure risk. Most tuners avoid S8U due to reliability concerns. Stage 1 remaps are not feasible; hardware changes are mandatory and not widely supported.
In a Laguna II dCi 115, expect ~7.2 L/100km (city) and ~5.1 L/100km (highway), or about 42 mpg UK combined. Trafic variants consume more (~8.5 L/100km combined). Real-world economy depends heavily on driving style and fuel quality, with degraded pumps increasing consumption significantly.
Yes. The S8U series is an interference engine. If the timing chain fails or jumps (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is generally durable with proper oil changes.
Renault specifies ACEA B3/B4 10W-40 diesel engine oil. Do not use BMW Longlife or C3 oils. Change every 15,000 km or annually. Correct oil is vital for chain, camshaft, and turbocharger longevity, especially under load or in hot climates.
Comprehensive technical documentation and regulatory references
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RENAULT 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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