Peugeot 2008 Alternator: Specs, Fitment & Common Faults

A genuine Peugeot recall covers a software fault causing charging issues on the 2008 — explaining why some owners replaced the alternator without ever fixing it.

Illustration for editorial purposes

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OEM Part Number: 439845

Accuracy note: genuine PSA Group reference shared broadly across C4/C5/Aircross, 3008, 508, DS3/DS5 of the relevant era.

Alternator	Genuine PSA reference: 439845 (also referenced as 9674646180, 9675753780)
Diesel/higher-output variants	Genuinely different alternator reference from the standard petrol units, reflecting the diesel engine's different electrical demands and mounting

Confirmed: A Genuine Recall for a Software Fault — Not the Alternator Itself — Peugeot 2008 Alternator

This is genuinely important to know before spending money on a new alternator: Peugeot confirmed a recall (reference HNZ) covering the 2008 and 208 specifically, addressing a possible non-compliance in the engine control unit's software that can disrupt battery charging. This is a genuine software fault, not a hardware failure in the alternator itself — and it directly explains a well-documented, frustrating pattern reported by multiple owners: replacing the alternator, sometimes more than once and at genuine dealer prices, without the charging fault actually resolving, because the alternator was never the actual problem. If you're experiencing a charging fault, checking whether this recall applies to your specific car via your VIN is worth doing before authorising any alternator replacement at all.

A genuinely useful diagnostic test worth doing first: these "smart" alternators are controlled by the engine ECU via a LIN-bus signal wire rather than charging at a fixed voltage. If you disconnect this signal connector at the back of the alternator and charging returns to normal, this confirms the alternator and wiring are genuinely fine, and the fault lies in the ECU software or its communication with the alternator — not the alternator itself. This single test can save you from an unnecessary, expensive replacement.

Peugeot 2008 Alternator: Often Blamed on the Battery Instead

On the Peugeot 2008, dim lights, slow starts, a battery that won't hold charge — these symptoms point equally to a weak battery or a failing alternator, and that overlap is why so many replacements target the wrong part first, with the real problem only surfacing weeks later.

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 2008 Alternator: What It Does

Electricity generation while the Peugeot 2008's engine is running is the alternator's job, charging the battery and directly powering the electrical systems. When it's working properly, the battery mostly just handles engine starting and short demand spikes, not day-to-day electrical load.

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Peugeot 2008 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.