Nissan X-Trail Alternator: Specs, Fitment & Common Faults
On the X-Trail, 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: 23100-4BB0B (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 0 986 084 690 / Hella 8EL 015 630-661
| Alternators (aftermarket) | Bosch 0 986 084 690 (150 A, freewheel pulley, 7 ribs, 50.3 mm, remanufactured exchange, PL382 LIN plug, core charge £24.86, excludes vacuum-pump versions); Hella 8EL 015 630-661 (150 A, freewheel pulley, 7 ribs, 50 mm, new); Lucas LRA03925 (150 A, freewheel pulley, 7 ribs, 49 mm, remanufactured, plug 0293 COM/LIN2C, core charge £75.36); AS-PL A3565S (150 A, freewheel pulley, 7 ribs, 48.5 mm, new, PL_2801 plug); AS-PL A3809S (180 A, freewheel pulley, 7 ribs, 49.5 mm, new, PL_2801 plug); AS-PL A3212 (200 A, rigid pulley, 7 ribs, 55 mm, new, PL_5100 plug, Valeo type); Walker WAL02387 (180 A, freewheel pulley, 7 ribs, 49 mm, new, plug 0293 COM/LIN2C, core charge £50.24). |
|---|---|
| Outputs & variants | Outputs of 120 A, 150 A, 180 A and 200 A are listed, all with the COM/LIN plug. The 150 A 7-rib unit on a 49-50 mm freewheel pulley is the standard fitment for the 1.6 dCi diesel; the 180 A 7-rib unit (OE FG18T172) and the 200 A rigid-pulley Valeo unit (OE 439870) serve the 1.6 dCi and 2.0 dCi with stop-start and higher electrical demand; the 120 A 6-rib units on 50-53 mm pulleys are for the 1.6 DIG-T petrol. |
| Genuine (OE) numbers quoted | F000BL0841 (AS-PL A0590S); F000BL50R4 (AS-PL A0875S); FG15T071 (AS-PL A3565S); FG18T172 (AS-PL A3809S); 439870 (AS-PL A3212). |
| Fitment notes | Read the rating off the old alternator before ordering, because three outputs are sold for the same diesel engine; the X-Trail's auxiliary belt should be renewed with the alternator, and the Bosch, Lucas and Walker exchange units carry a core charge refunded on return of the old part. |
A Genuine, Specific Root Cause Worth Checking First — Nissan X-Trail 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 X-Trail Alternator: Often Blamed on the Battery Instead
On the Nissan X-Trail, 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 X-Trail Alternator: Watch: Replacing It
Spanish exact-model alternative: C2pYFGolvKE
Nissan X-Trail Alternator: What It Does
Running the Nissan X-Trail'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 X-Trail 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.