Peugeot 108 Alternator: Specs, Fitment & Common Faults

On the 108, a whining noise at idle that gets louder under load is often the alternator's clutch pulley seizing, not the alternator itself failing.

Illustration for editorial purposes

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OEM Part Number: 27060-0Q010

Accuracy note: Aygo, C1, and 108 were built together at the TPCA joint-venture factory in the Czech Republic and share identical alternators across both generations.

First generation (2005-2014), 1.0 petrol	Genuine reference: 27060-0Q010 (also referenced as 27060-0Q170, 27060-0Q180 for later builds)
Second generation (2014-2022), 1.0 petrol	Genuine reference: 27060-0Q180

A Genuine, Well-Documented Cause Worth Checking First: The Clutch Pulley — Peugeot 108 Alternator

A well-documented, genuinely useful thing to check before assuming the alternator itself has failed: a groaning or whining noise from the belt area, particularly noticeable as engine revs rise, is very often the alternator's clutch pulley seizing up rather than the alternator's internal charging components failing. One documented case describes exactly this pattern — a loud whine assumed to be a cambelt or water pump issue, which disappeared entirely once the drive belt was removed, confirming the noise was coming from something belt-driven rather than the engine internals. Removing the belt and turning the pulley by hand in both directions is a genuinely useful test: it should lock solid in the normal drive direction and spin freely the other way — if it doesn't behave this way, the clutch pulley has failed rather than anything inside the alternator.

Worth knowing if you have a persistent charging fault rather than a noise: Peugeot's "smart" alternators are controlled by the engine ECU via a LIN-bus signal wire rather than charging at a fixed voltage, and a software-related recall (reference HNZ) has been confirmed on related models for exactly this kind of charging disruption. If disconnecting the alternator's signal connector restores normal charging, this points toward a software or ECU communication fault rather than the alternator itself — worth checking before authorising an expensive replacement.

Peugeot 108 Alternator: Often Blamed on the Battery Instead

On the Peugeot 108, 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.

Peugeot 108 Alternator: What It Does

The Peugeot 108'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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Peugeot 108 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 Peugeot Alternator

The same part, covered across other Peugeot models.