Hyundai CRDi (badge, not an engine)

turbocharged · diesel · 2000–present

Also known as: crdi, crdi diesel, common rail direct injection

CRDi is a badge, not an engine — it stands for common-rail direct injection, which by now describes every diesel sold.

Our rows show it on 1.1 to 3.0 litres across Hyundai and Kia, covering at least the D4FA, D4FC, D4FD, D4EA, D4EB, D4CB, D4HB and S6DA families — eight designs under one badge, three-cylinder to V6.

The code is stamped on the block and is what to search. D4CB is the big four-cylinder in the vans and pickups; D4FB/D4FC are the 1.6 in the small cars; D4HB the 2.2 in the SUVs. They share a badge and a fuel system philosophy and very little else.

Two things recur across the family and are worth stating once:

The D4CB's reputation is the timing chain and the balance shafts. A rattle on a cold start is the chain; a heavier knock under load on high-mileage vans is the balance-shaft bearings, and that one is terminal if ignored because it feeds the oil pump.
The DPF and EGR story is the ordinary one, and short journeys ruin both — but Hyundai's regeneration strategy is unusually sensitive to being interrupted, and a car whose regeneration is repeatedly cut short by a short journey accumulates fuel in the sump. That dilutes the oil, and an oil level that has RISEN on the dipstick is the tell.

Cars fitted with this engine

65 generations, across 2 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.

Hyundai

Kia

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

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The car — make, model, year and engine. The same fault behaves differently on each.
What you measured, not only what you replaced.
What actually fixed it — or that nothing did, which is worth knowing too.