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 (VCA UK Type Approval #VCA/EMS/8765).
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 | Renault RN0720 (ACEA C2/C3, SAE 5W‑30) | |
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.
The S8U 758's primary reliability risk is AdBlue injector clogging due to urea crystallisation, with elevated incidence in urban/short-trip usage. Renault internal field data from 2021 indicated a measurable uptick in NOx system faults before 50,000 km in high-idle duty cycles, while UK DVSA records show related emissions warnings in RDE-tested vehicles. Cold climates and infrequent highway driving amplify deposit formation, making system maintenance and driving pattern awareness critical.
Analysis derived from Renault technical bulletins (2019–2023) and UK DVSA failure statistics (2020–2023). 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 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.
Yes—ECU remapping can safely yield +20–25 kW on stock hardware due to conservative factory calibration. However, tuning increases stress on the CP4.2 pump and turbo, so supporting upgrades (fuel filtration, intercooler) are recommended.
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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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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