Nissan Note Alternator: Specs, Fitment & Common Faults

On the Note, a genuine, specific fault: a short factory wiring loom can fray at the voltage regulator plug.

Illustration for editorial purposes

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OEM Part Number: 23100-1HZ1A

Accuracy note: confirmed shared with the related Micra K13 (2010-2017), and a separate reference for the earlier diesel-engined Micra K12/Note E11.

K13-era, petrol	Nissan OEM: 23100-1HZ1A, 100-150 Amp
K12/E11, diesel	Nissan OEM: 2310000Q2C, 110 Amp — genuinely a different reference from the petrol units

A Genuine, Specific Root Cause Worth Checking First — Nissan Note Alternator

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 and warning lights that get blamed on the alternator itself.

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.

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 over an extended period with the warning light never illuminating even once.

Nissan Note Alternator: Often Blamed on the Battery Instead

On the Nissan Note, a failing alternator and a simply weak battery share almost the same symptom set at first: dim lights, sluggish starts, charge that won't hold. Mixing the two up is common, which is why plenty of people replace the battery only to find themselves back at the garage shortly after.

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.

Nissan Note Alternator: What It Does

The Nissan Note's electrical systems and battery charging both depend on the alternator generating electricity whenever the engine runs. If it's healthy, the battery's job shrinks down to starting the engine and handling brief surges in demand, not powering everything else on its own.

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Nissan Note 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 Nissan Alternator

The same part, covered across other Nissan models.