Lexus NX Alternator: Specs, Fitment & Common Faults
A genuinely useful piece of context worth knowing about alternator diagnosis: a dead battery has been documented traced to a specific ECU fault on related models, not the alternator itself.
Illustration for editorial purposes
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OEM Part Number: 27060-36101 (genuine alternator — confirm via VIN) — aftermarket alternators Denso DAN1013 / Hella 8EL 012 428-511
| Alternators (aftermarket) | Denso DAN1013 (130 A, freewheel pulley, 7 ribs, 58 mm, new, OE quality); Hella 8EL 012 428-511 (130 A, freewheel pulley, 7 ribs, 58 mm, new); Rotovis 9091619 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured, COM plug); Rotovis 9091977 (130 A, freewheel pulley, 6 ribs, 55 mm, remanufactured, COM plug); AS-PL A6810S (130 A, freewheel pulley, 6 ribs, 55 mm, new, plug PL_2306); AS-PL A6737S (150 A, freewheel pulley, 6 ribs, 55 mm, new, plug PL_2306); AS-PL A3946S (180 A, freewheel pulley, 6 ribs, 52.5 mm, new, plug PL_2306). |
|---|---|
| Outputs & variants | The NX 200t/300 (8AR-FTS 2.0 turbo) takes the six-rib 55 mm freewheel units with a COM/LIN plug at 130 A or 150 A, with a 180 A six-rib option (AS-PL A3946S); the seven-rib 58 mm 130 A and 150 A units are the older Toyota/Lexus pattern and should be matched by OE number. |
| Genuine (OE) numbers quoted | 104211-3462 (AS-PL A6810S); 104211-8860 (AS-PL A6737S); FGN17S029 (AS-PL A3946S); 104211-4170 (AS-PL A6730S); 104210-4670 (AS-PL A6522S); 1042104591 (AS-PL A6063); 104210-5010 (AS-PL A6465S); 104210-2370 (AS-PL A6371). |
| Fitment notes | The NX 300h hybrid (AYZ1_) does not use a conventional alternator, so these listings apply to the 200t and 300 petrol models; remanufactured exchange units from Walker and DRI carry core charges of £40-£50, and the Ridex units exclude a vacuum pump. |
Lexus NX Alternator: Often Blamed on the Battery Instead
On the Lexus NX, a failing alternator and a simply weak battery share almost the same symptom set at first: dim lights, sluggish starts, charge that won't hold. Mixing the two up is common, which is why plenty of people replace the battery only to find themselves back at the garage shortly after.
Lexus NX Alternator: What It Does
The Lexus NX's electrical systems and battery charging both depend on the alternator generating electricity whenever the engine runs. If it's healthy, the battery's job shrinks down to starting the engine and handling brief surges in demand, not powering everything else on its own.
Lexus NX Alternator: Watch: Replacing It
NX200t 2.0 turbo (NX300h hybrid has no belt alternator)
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A Genuinely Useful Piece of Context Worth Knowing About Alternator Diagnosis — Lexus NX Alternator
If you're chasing an engine bay noise, this is genuinely worth knowing: on related Lexus models, a dead or draining battery has been documented traced to a faulty Network Gateway ECU rather than the alternator itself on certain model years, worth ruling out before an alternator replacement.
It's also genuinely worth knowing an important safety point: if the alternator has genuinely failed, the car runs purely on battery power, which depletes quickly and can leave you stranded — worth arranging recovery rather than continuing to drive.
Lexus NX 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 Lexus Alternator
The same part, covered across other Lexus models.