Renault Captur Alternator: Specs, Fitment & Common Faults

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

Illustration for editorial purposes

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OEM Part Number: 231009933R (genuine alternator — confirm via VIN) — aftermarket alternators Valeo 440056 / Lucas LRA02974

Accuracy note: Covers the Renault Captur (2013-2019) as listed in the UK aftermarket catalogues. Alternators are sold by output (amps), pulley type and plug, and the same model usually has two or three units depending on engine, start-stop and the electrical load of the trim — a 120 A unit on a car built for 150 A will undercharge, and a rigid pulley on a car designed for a freewheel clutch pulley will shred belts. The references below are UK aftermarket catalogue listings for this generation, labelled by brand; many are remanufactured exchange units that carry a core charge until the old alternator is returned. Genuine numbers are shown only where a listing quotes one. Check the amp rating, pulley and plug stamped on the old unit, or confirm via VIN, before ordering.

Alternators (aftermarket)	Valeo 440056 (125 A, freewheel pulley, 6 ribs, 55 mm, remanufactured exchange, B+ clamp, four-point mounting, £50.24 core); Valeo 440679 (120 A, freewheel pulley, 7 ribs, remanufactured exchange, four-point mounting, £50.24 core); Lucas LRA02974 (125 A, freewheel pulley, 6 ribs, 55 mm, remanufactured, plug 0129 / L-DFM, £25.12 core); Lucas LRA03871 (90 A, freewheel pulley, 7 ribs, 49 mm, remanufactured, plug 0293 / COM-LIN2C, £50.24 core); AS-PL A3563S (120 A, freewheel pulley, 7 ribs, 48.6 mm, new, plug PL_2801); AS-PL A3561S (150 A, freewheel pulley, 6 ribs, 55 mm, new, plug PL_2801); Ridex 4G0366 (150 A, freewheel pulley, 6 ribs, 55 mm, new, COM plug, supplied without vacuum pump)
Outputs & variants	90 A, 120/125 A and 150 A units are listed, with a 210 A BV PSH unit at the top end. The 90 A units sit on a 49 mm 7-rib pulley, the 120/125 A units split between a 55 mm 6-rib pattern and a 49-50 mm 7-rib pattern, and the 150 A units use a 55 mm 6-rib pulley. Every unit listed uses a freewheel clutch pulley; there is no rigid-pulley option.
Genuine (OE) numbers quoted	AS-PL A3563S for TG12C164; AS-PL A3561S for FG15T057; AS-PL A3552S for FG15T056; AS-PL A3118 for SG12B105
Fitment notes	Pulley diameter and rib count are the quickest way to separate the three families, since the retailer does not tie any unit to a specific engine. Ridex and Stark units are supplied without the vacuum pump, so a diesel with a pump on the back of the alternator must keep the original. Remanufactured Valeo and Lucas units are exchange parts with a core charge of £25.12 to £50.24 refunded on return of the old unit.

A Genuine, Documented Fault: The Pulley Can Literally Split — Renault Captur Alternator

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.

Renault Captur Alternator: Often Blamed on the Battery Instead

On the Renault Captur, 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 Captur Alternator: Watch: Replacing It

🎬 Watch: Renault Capture 0.9 2013 stater motor and alternator replacement

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2013 Captur 0.9 TCe; covers starter and alternator together.

Renault Captur 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.

Renault Captur Alternator: What It Does

The Renault Captur's 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.

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Renault Captur Alternator: 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.