Audi Q5 Alternator: Specs, Fitment & Common Faults
On the Q5, a broomstick technique can genuinely help isolate whether a noise comes from the alternator, before assuming a battery replacement will fix it.
Illustration for editorial purposes
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OEM Part Number: 06B903016AC (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 0 986 081 340 / Valeo 439775
| Alternators (aftermarket) | Bosch 0 986 081 340 (140 A, freewheel pulley, 6 ribs, 50 mm, remanufactured exchange, plug ID 166, core charge £94.06, excludes vacuum pump); Bosch 0 986 083 960 (150 A, multi-rib rigid pulley, 6 ribs, 56 mm, remanufactured exchange, plug PL181, core charge £27.23, excludes vacuum pump); Valeo 439775 (150 A, freewheel, 6 ribs, 57 mm, new); Valeo 439642 (140 A, freewheel, 6 ribs, 51 mm, new); Valeo 440680 (180 A, freewheel, 6 ribs, 57 mm, remanufactured exchange, core charge £50.24); Valeo 440208 (140 A, freewheel, 6 ribs, 51 mm, remanufactured exchange, core charge £50.24); Hella 8EL 015 630-641 (150 A, freewheel, 6 ribs, 50 mm, new); Hella 8EL 011 713-041 (140 A, freewheel, 6 ribs, 56 mm, new) |
|---|---|
| Outputs & variants | Three outputs are listed. 140 A covers the 2.0 TFSI petrol engines; 150 A (Bosch 0 986 083 960, Valeo 439775, Hella 8EL 015 630-641, AS-PL A0576S and A3208) is the usual 2.0 TDI fitment; 180 A (Valeo 440680, Ridex 4G1139 and 4G1283) suits the 3.0 TDI, 3.2 FSI and SQ5. Most units carry a freewheel pulley, but the 150 A Bosch 0 986 083 960 and the Ridex 4G0966, 4G1002 and 4G1080 have rigid pulleys. |
| Genuine (OE) numbers quoted | 0125711130 (AS-PL A0576S), 0124525530 (AS-PL A0429S), TG15C095 (AS-PL A3208). |
| Fitment notes | Pulley diameters range from 49 mm to 57 mm and some engines drive a vacuum pump from the alternator, which must be transferred as the Bosch and Ridex units are supplied without it; the remanufactured Bosch units carry a core charge of up to £94.06 and the Valeo units £50.24, both refunded on return of the old alternator. |
Audi Q5 Alternator: Often Blamed on the Battery Instead
On the Audi Q5, 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.
Audi Q5 Alternator: What It Does
The Audi Q5'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.
Audi Q5 Alternator: Watch: Replacing It
8R 2.0 TFSI; 3.0 TDI owners see OlRUrmNhZTk
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A Genuinely Useful Piece of Context Worth Knowing About Alternator Diagnosis — Audi Q5 Alternator
If you're trying to confirm whether a noise is genuinely coming from the alternator, this is genuinely worth trying: touching one end of a wooden broomstick to the alternator housing, with the other end held close to your ear, can help you hear the noise much more clearly.
It's also genuinely worth knowing that related Audi models fitted with the 48V mild hybrid system have documented alternator failures specifically tied to this system, with a confirmed US extended warranty covering the issue.
Audi Q5 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 Audi Alternator
The same part, covered across other Audi models.