Peugeot 3008 Alternator: Specs, Fitment & Common Faults
On the 3008, a whining noise that gets louder under load is often the alternator's clutch pulley seizing, not the alternator itself failing — worth confirming before a costly replacement.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — alternators (aftermarket) Valeo 443028 / Lucas LRA03626
| Alternators (aftermarket) | Valeo 443028 (150 A, belt pulley, 6 ribs, 51 mm, new, three-point mounting); Valeo 440677 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured exchange with deposit, core charge £50.24); Valeo 439965 (180 A, rigid belt pulley with V-ribbed pulley, 6 ribs, 53 mm, new, stop-start vehicles only, no speed-sensor connection); Valeo 439864 (210 A, rigid belt pulley with V-ribbed pulley, 6 ribs, 53 mm, new, stop-start vehicles only); Lucas LRA03626 (180 A, 6 ribs, 54 mm, remanufactured, plug 0223 COM-D, core charge £25.12); Lucas LRA04259 (220 A, freewheel pulley, 6 ribs, 54 mm, remanufactured, plug 0223, core charge £25.12); Lucas LRA04437 (180 A, freewheel pulley, 6 ribs, 54 mm, remanufactured, COM/LIN 1-2-2A plug, core charge £25.12, Euro 6.2 engines); AS-PL A3579S (180 A, freewheel pulley, 6 ribs, 54 mm, new, PL_2402 plug) |
|---|---|
| Outputs & variants | Outputs of 120 A, 150 A, 180 A, 210 A, 220 A and 230 A are listed, far more than on the earlier PSA cars. The 120 A and 150 A freewheel units cover the 1.2 PureTech and 1.6 THP without stop-start; the 180 A 54 mm freewheel units with the COM/LIN plug (OE FG18S027 and A3TX2981) are the common 1.5 and 1.6 BlueHDi and 1.2 PureTech stop-start fitment on later Euro 6.2 cars; the Valeo 180 A and 210 A rigid-pulley units (OE 439845 and 439864) are the reversible stop-start alternators on earlier 1.6 and 2.0 BlueHDi; and the 220-230 A units (OE A3TV0281) serve the 2.0 BlueHDi 180 and high-specification cars with the largest electrical load. |
| Genuine (OE) numbers quoted | 439845 (AS-PL A3439 (VALEO)); FG18S027 (AS-PL A3579S); 439864 (Valeo 439864 and AS-PL A3585 (VALEO)); A3TX2981 (AS-PL A5460); A3TV0281 (AS-PL A5432S). |
| Fitment notes | Six different outputs are sold for this one body, so take the rating and the plug type from the old alternator and check whether the car has stop-start before ordering, as the Valeo stop-start units are not interchangeable with the freewheel-pulley COM/LIN units; Lucas and Valeo exchange units carry a core charge refunded on return of the old part. |
A Genuine, Well-Documented Cause Worth Checking First: The Clutch Pulley — Peugeot 3008 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.
Peugeot 3008 Alternator: Often Blamed on the Battery Instead
On the Peugeot 3008, 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.
Peugeot 3008 Alternator: Watch: Replacing It
1.6 HDi engine also fitted to early 3008 II; no 3008-specific replacement video found
Peugeot 3008 Alternator: What It Does
The Peugeot 3008'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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Peugeot 3008 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.