Nissan Juke Alternator: Specs, Fitment & Common Faults
On the Juke, a genuine, specific fault: a short factory wiring loom can fray at the voltage regulator plug.
Illustration for editorial purposes
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OEM Part Number: 23100-1KM1A (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 0 986 080 400 / Valeo 443281
| Alternators (aftermarket) | Bosch 0 986 080 400 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured exchange, plug 72, core charge £94.06, excludes vacuum-pump versions); Valeo 443281 (150 A, freewheel pulley, 6 ribs, 55 mm, new, four-point mounting); Valeo 440689 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured exchange with deposit, core charge £50.24); Hella 8EL 012 429-451 (150 A, freewheel pulley, 6 ribs, 56 mm, new); Lucas LRA02884 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured, plug 0129, core charge £25.12); AS-PL A5119 (110 A, rigid pulley, 7 ribs, 55 mm, new, PL_3308 plug); AS-PL A5124 (110 A, freewheel pulley, 6 ribs, 50 mm, new, PL_3308 plug). |
|---|---|
| Outputs & variants | Two families are listed. The 150 A units are the Bosch-pattern alternator with a 6-rib 55 mm freewheel pulley fitted to the 1.5 dCi diesel and the 1.6 DIG-T turbo petrol (OE 0124525082 on the AS-PL A0168). The 110 A units are Mitsubishi-pattern alternators for the 1.6 naturally aspirated petrol, offered with a 7-rib rigid pulley (A5119, OE A2TJ1291ZD) or a 6-rib 50 mm freewheel pulley (A5124, OE A2TJ2081ZE), so rib count and pulley must be matched to the old part. |
| Genuine (OE) numbers quoted | A3TJ4081ZE (AS-PL A5397S); 0124525082 (AS-PL A0168(P)); A2TJ1291ZD (AS-PL A5119); A2TJ2081ZE (AS-PL A5124); A3TJ4181ZE (AS-PL A5415S). |
| Fitment notes | The 1.6 petrol and the diesel and turbo-petrol alternators are not interchangeable, so check output and plug before ordering; the Bosch exchange unit carries a large core charge, refunded on return of the old alternator, and Bosch recommends renewing the auxiliary belt at the same time. |
A Genuine, Specific Root Cause Worth Checking First — Nissan Juke Alternator
A documented, specific fault worth checking before assuming the alternator itself has failed: the factory wiring loom connecting to the alternator's voltage regulator plug is relatively short, and over time the wires can rub through and start to fray at this specific connection point, causing exactly the intermittent charging faults and warning lights that get blamed on the alternator itself.
It's also worth knowing that a genuine alternator fault doesn't always trigger the dashboard warning light — one documented case saw persistent, confirmed alternator symptoms over an extended period with the warning light never illuminating even once.
Nissan Juke Alternator: Often Blamed on the Battery Instead
On the Nissan Juke, it's genuinely hard to tell a weak battery from a failing alternator just from symptoms — both produce dim lights, slow starts, and a battery that won't hold charge. That's exactly why so many people end up replacing the wrong part, then returning to the garage a few weeks later.
Nissan Juke Alternator: Watch: Replacing It
F15 1.5 dCi
Nissan Juke Alternator: What It Does
Running the Nissan Juke's electrical systems and keeping the battery charged while the engine turns over — that's the alternator's role. A properly functioning one means the battery only really needs to worry about starting the car and absorbing occasional spikes in demand.
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Nissan Juke 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 Nissan Alternator
The same part, covered across other Nissan models.