Renault Df455 !exclusive!

Renault DF455 — Technical and Historical Analysis

Abstract

The Renault DF455 is a diesel engine produced by Renault primarily for light commercial vehicles and some passenger models in the late 20th century. This paper examines the DF455’s technical specifications, design features, performance characteristics, common applications, maintenance considerations, and its place in Renault’s diesel-engine evolution. It also assesses the engine’s strengths, limitations, and implications for restorers and classic-vehicle enthusiasts.

d) Oil pressure issues (rare but serious)

• Symptoms: Warning light flickers at idle (hot engine).
• Cause: Worn oil pump relief valve or blocked oil pickup (sludge).
• Fix: Drop oil pan, clean pickup, replace pump if needed.

e) Timing belt failure – catastrophic

• Always replace on schedule (100k km or 5 years). Use OEM or Continental kit.

• Renault Laguna II
• Renault Megane II / Scenic II
• Engines typically affected: 1.9 dCi (F9Q) and 2.0 dCi diesel variants.