The Renault S8U 758 is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a high — pressure common‑rail fuel system, variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 110 kW (150 PS) and 340 Nm of torque, engineered for responsive low‑rpm performance and compliance with Euro 6d emissions.
Fitted to models such as the Kadjar, Talisman, and Espace—including the dCi 150 variants—the…
All production years 2018–2023 meet Euro 6d emissions standards .
The Renault S8U 758 is a 1,995 cc inline‑four turbo‑diesel engineered for mid‑size SUVs and sedans (2018–2023). It combines high-pressure common‑rail injection with a variable‑geometry turbocharger to deliver strong low‑rpm torque and refined cruising. Designed to meet Euro 6d standards, it balances performance with stringent emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 110 kW (150 PS) | |
Torque | 340 Nm @ 1,750 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 165 kg |
The Renault S8U 758 was used across Renault's CMF‑CD platform with transverse mounting. This engine received platform-specific adaptations—reinforced mounts in the Espace and revised cooling ducts in the Kadjar—and from 2021 the Talisman facelift adopted updated AdBlue hardware, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The S8U 758 is generally robust when maintained properly, but early units (2018–2021) are prone to AdBlue injector issues. Post-2021 revisions improved reliability. Using correct RN0720 oil, quality diesel, and avoiding constant short trips significantly enhances longevity.
Top issues include AdBlue injector clogging, Bosch CP4.2 fuel pump wear, EGR cooler leaks, and DPF regeneration failures. These are documented in Renault service bulletins RSB‑EMI‑2021‑08 and RSB‑FUEL‑2020‑03, especially in urban-driven vehicles.
The S8U 758 powers the Kadjar, Talisman, and Espace from 2018–2023, all in dCi 150 form. It is exclusive to Renault and not shared with Nissan or Mercedes under this code. All meet Euro 6d emissions standards.
Aftermarket ECU tuning is common on the S8U-758 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Official WLTP combined is ~5.2 L/100km (~54 mpg UK). Real-world mixed driving typically achieves 5.5–6.5 L/100km (43–51 mpg UK), depending on model and driving style. Highway efficiency exceeds 4.5 L/100km.
Yes. The S8U series is an interference design. Timing chain failure—though rare due to front-mounted robust design—could cause piston-to-valve contact and catastrophic damage. No widespread chain issues reported.
Renault specifies RN0720-compliant 5W‑30 synthetic oil (ACEA C2/C3). This low-SAPS formulation protects the DPF and SCR system. Change every 20,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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