The Renault R9M 452 is a 1,749 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a high-pressure common‑rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 96 kW (130 PS) and 300 Nm of torque, with strong low‑rpm pull for responsive everyday driving.
Fitted to models such as the Megane IV, Kadjar, and Captur II, including variants like the dCi 130, the R9M 452 was engineered for balanced urban efficiency and motorway refinement. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), meeting Euro 6d TEMP standards from launch.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, highlighted in Renault Service Bulletin 13B002. This issue stems from insufficient lubrication under frequent short-trip conditions. From mid‑2020, Renault implemented revised pump drive components to enhance durability.
All production years 2018–2023 meet Euro 6d TEMP (RDE Step 1) standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault R9M 452 is a 1,749 cc inline‑four turbo‑diesel engineered for compact and crossover models (2018–2023). It combines Bosch common‑rail injection with a single variable‑geometry turbocharger to deliver responsive low‑end torque and refined cruising. Designed to meet Euro 6d TEMP (RDE Step 1), it balances performance with strict emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,749 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 80.0 mm × 87.3 mm | |
| Power output | 96 kW (130 PS) | |
| Torque | 300 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d TEMP (RDE Step 1) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Renault RN0720 (SAE 5W‑30) | |
| Dry weight | 148 kg |
The R9M 452 provides smooth low-RPM torque ideal for city and highway use but demands strict adherence to 20,000 km oil change intervals to protect the Bosch CP4.2 high-pressure fuel pump. Renault RN0720 (5W-30) oil is critical due to its low-SAPS formulation preserving DPF and EGR function. Frequent short trips without warm-up increase fuel dilution and pump wear. Post-2020 models include a reinforced pump drive per Renault SIB 13B002. DPF regeneration cycles must complete uninterrupted to avoid limp mode.
Oil Specs: Requires Renault RN0720 (5W-30) specification (Renault SIB 13B002). Equivalent to ACEA C2/C3.
Emissions: Euro 6d TEMP (RDE Step 1) applies to all 2018–2023 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under UN ECE R85 standards. Output validated on EU5+ ultra-low-sulfur diesel (Renault TIS M1749‑D).
Renault Technical Information System (TIS): Docs M1749-A, M1749-B, M1749-C, SIB 13B002
VCA Type Approval Database (VCA/EMS/5678)
UN Regulation No. 85 (Engine Power Measurement)
The Renault R9M 452 was used across Renault's CMF-CD platform with transverse mounting. This engine received platform-specific adaptations—reinforced mounts in the Kadjar and revised air intake routing in the Captur II—and from 2020 the updated Megane IV Phase 2 adopted minor ECU and pump revisions, creating limited interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the alternator mount (Renault TIS M1749-F). The 7th VIN digit indicates engine family ('M' for R9M series). All R9M 452 units feature black valve covers and a Honeywell turbo with integrated actuator. Critical differentiation from R9M 450: R9M 452 uses Bosch EDC17C74 ECU with OBD2 port under dash; R9M 450 uses EDC17C73. Fuel pump drive components changed after production date 06/2020—verify part numbers before replacement (Renault SIB 13B002).
The R9M 452's primary reliability risk is high-pressure fuel pump drive wear, with elevated incidence in frequent short-trip usage. Renault internal quality data from 2021 indicated a measurable uptick in pump-related warranty claims before 80,000 km in urban fleets, while UK DVSA MOT records show DPF-related failures as the second-most common diesel issue for this engine. Cold starts and incomplete regenerations accelerate carbon and soot accumulation, making oil quality and driving pattern critical.
Analysis derived from Renault technical bulletins (2019–2023) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT R9M-452.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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