Nissan Qashqai Alternator: Specs, Fitment & Common Faults

A genuine, specific fault: a short factory wiring loom can fray at the voltage regulator plug — plus a real case where only a genuine Nissan alternator resolved faults a generic part couldn't fix.

Illustration for editorial purposes

OEM Part Number: 23100-4BB0B

Accuracy note: confirmed for 2014-2018 builds, 2.0L, 120 Amp — this same reference is shared with the same-era X-Trail T32/Qashqai and Nissan Rogue.

2.0L, 2014-2018, 120 Amp	Nissan OEM: 23100-4BB0B (also referenced as 23100-4BB0A)

A Genuine, Specific Root Cause Worth Checking First

A documented, specific fault worth checking before assuming the alternator itself has failed: the factory wiring loom connecting to the alternator's voltage regulator plug is relatively short, and over time the wires can rub through and start to fray at this specific connection point, causing exactly the intermittent charging faults, warning lights, and stop-start failures that get blamed on the alternator itself. It's genuinely worth inspecting this specific connector and the wiring immediately around it for visible chafing or fraying before authorising a full alternator replacement.

A genuinely valuable, real finding worth knowing before buying a generic replacement: one documented case saw a generic aftermarket alternator fitted after a diagnosis of alternator failure, only for warning lights and stop-start faults to persist exactly as before. An auto-electrician eventually confirmed the car's systems simply didn't communicate correctly with the generic part, and fitting a genuine Nissan alternator resolved the fault completely. This points to a genuine compatibility sensitivity with this car's charging system electronics — worth knowing before buying the cheapest available alternator, since a generic part that seems electrically equivalent may not communicate correctly with the car's other systems.

It's also worth knowing that a genuine alternator fault doesn't always trigger the dashboard warning light — one documented case saw persistent, confirmed alternator symptoms (flickering dash lights, radio cutting in and out, characteristic whine) over an extended period with the warning light never illuminating even once. Don't rule out the alternator simply because the dashboard hasn't flagged anything.

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.

Nissan Qashqai 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 Nissan Alternator

The same part, covered across other Nissan models.