Vauxhall Mokka Alternator: Specs, Fitment & Common Faults
On the Mokka, 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: 13579675 (as quoted in catalogue listings — confirm via VIN) — aftermarket alternators Bosch 1 986 A00 066 / Hella 8EL 011 713-071
| Alternators (aftermarket) | Bosch 1 986 A00 066 (140 A, freewheel pulley, 6 ribs, 59.5 mm, new, plug 180, excludes vacuum pump); Bosch 0 986 087 120 (120 A, rigid multi-rib pulley, 6 ribs, 53.5 mm, remanufactured exchange, plug 180, excludes vacuum pump, core charge £23.73); Hella 8EL 011 713-071 (140 A, freewheel pulley, 6 ribs, 60 mm, new, core charge £6.91); Hella 8EL 011 713-581 (130 A, freewheel pulley, 6 ribs, 54 mm, new); Lucas LRA03714 (140 A, freewheel pulley, 6 ribs, 60 mm, remanufactured, plug 0248 L-DFM, core charge £25.12); AS-PL A1039 (140 A, freewheel pulley, 6 ribs, 60 mm, new, plug PL_2201); AS-PL A3670S (140 A, freewheel pulley, 6 ribs, 53.7 mm, new, plug PL_2201); Rotovis 9090965 (130 A, freewheel pulley, 6 ribs, 54 mm, remanufactured, plug DFM/COM). |
|---|---|
| Outputs & variants | Outputs of 120 A, 130 A and 140 A are listed, all six-rib. The 130 A units sit on a 54 mm freewheel pulley (Hella 8EL 011 713-581, Rotovis, BV PSH 835.585.130.000, Walker WAL00646); the 140 A units come in two sizes, a 60 mm freewheel pulley (Bosch 1 986 A00 066, Hella 8EL 011 713-071, Lucas, AS-PL A1039) and a 53-54 mm pulley (AS-PL A3670S, AS-PL A3799S, Walker WAL00895, BV PSH 135.504.140.000); the 120 A Bosch exchange is rigid. |
| Genuine (OE) numbers quoted | AS-PL A1039 for OE 13579675; AS-PL A3799S for OE TG12C054; AS-PL A3670S for OE TG12C074. |
| Fitment notes | Bosch and Pulsar units are sold without the vacuum pump, which matters on the CDTi diesels. Core charges of £23.73 (Bosch exchange), £25.12 (Lucas) and £50.24 (Walker) are refunded on return of the old alternator. |
A Genuine Diagnostic Technique Worth Trying First — Vauxhall Mokka 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 Mokka Alternator: Often Blamed on the Battery Instead
On the Vauxhall Mokka, 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.
Vauxhall Mokka Alternator: Watch: Replacing It
Engine match only (1.6 CDTi fitted to Mokka 2015-on); no Mokka alternator video in any language.
Vauxhall Mokka Alternator: What It Does
Electricity generation while the Vauxhall Mokka'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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Vauxhall Mokka 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.