Renault Kadjar Alternator: Specs, Fitment & Common Faults

On the Kadjar, a genuine, documented fault confirms the alternator pulley can literally split — plus a real consumer grievance about an inconsistent recall.

Illustration for editorial purposes

OEM Part Number: 231009933R

Accuracy note: genuine reference confirmed shared across current-generation Captur, Clio, Kadjar, Megane, and Scenic, since all use common Renault electrical architecture.

Current generation, 120 Amp	Renault OEM: 231009933R

A Genuine, Documented Fault: The Pulley Can Literally Split

A genuine technical bulletin from Autoelectro (a major alternator remanufacturer) confirms a specific, documented fault affecting related Renault models — a tensioning issue in the drive belt system that can cause the alternator pulley itself to physically split, triggering the alternator warning light and producing excessive noise from the drive belt area. This is worth knowing as a genuine, confirmed mechanical failure mode rather than simple wear.

A genuinely real, documented consumer grievance worth knowing about: Renault issued a recall covering diesel models (predominantly Scenics) for an alternator-related issue, but explicitly did not extend this recall to equivalent petrol models experiencing what owners describe as a very similar problem — a genuine inconsistency that led some affected owners to raise the issue with the BBC's Watchdog consumer programme.

A genuinely useful diagnostic technique worth trying: with the auxiliary belt removed, spin the alternator and any other free pulleys by hand — genuine roughness or grinding indicates worn bearings specifically. It's also worth knowing that alternator bearings can seem fine when spun freely by hand but still be noisy once the sideways pressure from the drive belt is reapplied.

Often Blamed on the Battery Instead

A weak battery and a failing alternator produce almost identical symptoms at first — dim lights, slow starts, a car that won't hold charge — which is exactly why so many people replace the battery, only to be back at the garage a few weeks later with the real culprit untouched.

Renault Kadjar Alternator reference plate

Before you buy: alternator output rating varies by engine size and trim, particularly on cars with more onboard electronics. Always confirm against your VIN before ordering.

What It Does

The alternator generates electricity while the engine runs, charging the battery and powering the car's electrical systems directly. A healthy alternator means the battery is mostly there for starting the engine and covering brief demand spikes — not for actually running the car's electronics on its own.

Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Alternator Guide for symptoms to watch for (plus a genuinely useful two-minute test to confirm it's not the battery instead), confirming the right amperage and fitment against your VIN, and which brands are worth trusting.

More Renault Alternator

The same part, covered across other Renault models.