Vauxhall Adam Alternator: Specs, Fitment & Common Faults
On the Adam, removing the auxiliary belt briefly is a genuinely reliable way to confirm whether a whine or grinding noise is really the alternator.
Illustration for editorial purposes
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OEM Part Number: 13502471 (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 0 986 083 810 / Hella 8EL 011 713-571
| Alternators (aftermarket) | Bosch 0 986 083 810 (90 A, remanufactured exchange, excludes vacuum pump, clockwise rotation, core charge £23.10, belt replacement recommended); Hella 8EL 011 713-571 (100 A, freewheel pulley, 6 ribs, new, fitting by qualified personnel); Hella 8EL 011 713-581 (130 A, freewheel pulley, 6 ribs, 54 mm, new); AS-PL A3670S (140 A, freewheel pulley, 6 ribs, 53.7 mm, new, plug PL_2201); AS-PL A0863S (130 A, rigid belt pulley, 5 ribs, 54 mm, new, plug PL_2201); Ridex 4G1608R (100 A, freewheel pulley, 6 ribs, 54 mm, remanufactured, excludes vacuum pump, integrated regulator, core charge £30.14); Rotovis 9090965 (130 A, freewheel pulley, 6 ribs, 54 mm, remanufactured, plug DFM/COM). |
|---|---|
| Outputs & variants | Outputs of 90 A, 100 A, 130 A and 140 A are listed on a common 54 mm pulley. The 100 A units are six-rib freewheel (Hella 8EL 011 713-571, Ridex 4G1608R, BV PSH 135.580.100.030); the 130 A units come in both six-rib freewheel (Hella 8EL 011 713-581, BV PSH 835.585.130.000) and five-rib rigid form (AS-PL A0863S, BV PSH 135.903.130.010); the 140 A AS-PL A3670S is six-rib freewheel. |
| Genuine (OE) numbers quoted | AS-PL A3670S for OE TG12C074; AS-PL A0863S for OE 0126312100. |
| Fitment notes | The Bosch and Ridex reman units are supplied without the vacuum pump and carry refundable core charges of £23.10 and £30.14; Walker units carry a £50.24 charge. |
A Genuine Diagnostic Technique Worth Trying First — Vauxhall Adam Alternator
If you're hearing a whine or grinding noise that changes with engine speed, it's genuinely worth confirming the alternator is actually the source before paying for a replacement. Removing the auxiliary (serpentine) belt and briefly starting the engine is a well-corroborated diagnostic technique — if the noise disappears with the belt off, it's coming from one of the belt-driven components (alternator, water pump, power steering pump, or tensioner pulley) rather than something internal to the engine. Spinning each pulley by hand afterward, checking for roughness or play, usually reveals which specific component has failed bearings.
Vauxhall Adam Alternator: Often Blamed on the Battery Instead
Early on, a weak Vauxhall Adam battery and a dying alternator look almost identical — dim lights, sluggish starts, a car that won't hold its charge — which is exactly why so many people fit a new battery and end up back at the garage weeks later, the actual fault still unaddressed.
Vauxhall Adam Alternator: Watch: Replacing It
Adam is Corsa D-based with the same 1.2/1.4 petrols; no Adam video found
Vauxhall Adam Alternator: What It Does
On the Vauxhall Adam, while the engine runs, the alternator generates the electricity that charges the battery and powers the car's electrical systems directly. With a healthy alternator, the battery's real job becomes starting the engine and covering brief demand spikes, rather than running the electronics on its own.
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Vauxhall Adam 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 Vauxhall Alternator
The same part, covered across other Vauxhall models.