Ford Ka+ Alternator: Specs, Fitment & Common Faults
A simple multimeter test confirms whether it's genuinely the alternator — worth doing before paying for a replacement that might not fix anything.
Illustration for editorial purposes
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OEM Part Number: 7G9N-10300-CC (genuine alternator — confirm via VIN) — aftermarket alternators Valeo 440135 / Lucas LRA03009
| Alternators (aftermarket) | Lucas LRA03009 (120 A, rigid multi-rib pulley, 6 ribs, 49 mm, reman, plug 0213 with M8 B+ and COM/LIN1, core charge GBP 25.12); Valeo 440135 (120 A, V-ribbed pulley, 6 ribs, 51 mm, reman premium exchange, three-point mounting, R18 position, core charge GBP 50.24); AS-PL A3129 (120 A, rigid belt pulley, 6 ribs, 49 mm, new, PL_2305 plug); AS-PL A6992 Denso-pattern (120 A, rigid belt pulley, 6 ribs, 49 mm, new, PL_2305 plug); AS-PL A3587S (155 A, freewheel clutch pulley, 6 ribs, 53.5 mm, new, PL_2305 plug); AS-PL A0904S (110 A, freewheel clutch pulley, 6 ribs, 49 mm, new, PL_2305 plug); HC-Cargo F 032 114 883 Bosch-pattern (120 A, 6 ribs, 49 mm, new, PL174 plug with LIN); Pulsar PSR10275 (120 A, rigid multi-rib pulley, 6 ribs, 49 mm, new, PL174 plug, excludes vacuum pump). |
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| Outputs & variants | The 1.2 Ti-VCT petrol takes the 120 A unit on a 49 mm rigid multi-rib pulley, the same Bosch-pattern alternator used on the Fiesta and Focus; a 110 A freewheel version with a Bosch F000BL067A heritage also appears for the 1.2; the 1.5 TDCi diesel and later 1.5 petrol take a 140 A or 155 A unit on a 52 to 53 mm freewheel clutch pulley. |
| Genuine (OE) numbers quoted | AS-PL A3129 quotes TG12C087; AS-PL A6992 quotes Denso DAN1522; AS-PL A0904S and A0904(SEG) quote F000BL067A; AS-PL A3679S quotes TG12C108; AS-PL A3587S quotes TG15C229. |
| Fitment notes | The 120 A rigid-pulley and 155 A freewheel units are not interchangeable, so confirm the engine and pulley type before ordering; Lucas and Valeo exchange units carry a refundable core charge; Pulsar PSR10275 excludes engines with an alternator-driven vacuum pump; ERA 210430A and Casco CAL15477AS are listed as replacements only for Valeo original fitment. |
A Genuine Test Worth Doing Before Replacing the Alternator — Ford Ka+ Alternator
With the engine running, a multimeter across the battery terminals should read roughly 13.8-14.5V — notably lower readings suggest the alternator isn't charging properly, while readings well above 14.5V point to a failing voltage regulator instead. A whining noise that gets louder when heavy electrical loads switch on is also a strong practical indicator worth checking first.
Ford Ka+ Alternator: Often Blamed on the Battery Instead
On the Ford Ka+, a weak battery and a failing alternator produce almost identical symptoms at first — dim lights, slow starts, a car that won't hold charge — which is exactly why so many people replace the battery, only to be back at the garage a few weeks later with the real culprit untouched.
Ford Ka+ Alternator: Watch: Replacing It
Portuguese; Brazilian Ka 1.0/1.2 three-cylinder is the same car as the Ka+
Ford Ka+ Alternator: What It Does
The Ford Ka+'s alternator generates electricity while the engine runs, charging the battery and powering the car's electrical systems directly. A healthy alternator means the battery is mostly there for starting the engine and covering brief demand spikes — not for actually running the car's electronics on its own.
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Ford Ka+ 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 Ford Alternator
The same part, covered across other Ford models.