This page lists 6 electrical parts for the 2021 Audi S5, across 2 part types, covering the 3.0L V6 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
The electrical system on the 2021 Audi S5 covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. All 6 listed parts are Alternator / Generator (4 parts) and Battery Current Sensor (2 parts).
The 2021 Audi S5 came with a single engine, the 3.0L V6 Turbocharged, and every part is verified against it.
6 brands supply electrical parts for the 2021 Audi S5, led by VALEO (1 part), WAI GLOBAL (1 part) and FVP (1 part), plus 3 more brands. Quality grades include New and Remanufactured.
Each part number listed for the 2021 Audi S5 opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALEO | 443008 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pulley Diameter 58mm110 Amps | View on Amazon |
| WAI GLOBAL | 21089N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Valeo 150 Amp | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 10470 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| PURE ENERGY | 10470 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
4 Alternator / Generator parts for the 2021 Audi S5 come from 4 brands — VALEO, WAI GLOBAL, FVP and 1 other brand.
The New section lists 2 options from VALEO and WAI GLOBAL — brand-new units rather than rebuilt ones. VALEO 443008 is listed in this group.
The Remanufactured section lists 2 options from FVP and PURE ENERGY — factory-rebuilt units with new wear components. FVP 10470 is listed in this group.
This group includes VALEO 443008, WAI GLOBAL 21089N and FVP 10470 and the remaining parts above.
Battery Current Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 358158001 | 🇺🇸 US | BoltedIntelligent Battery Sensor | View on Amazon |
| WELLS | 5S16132 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Battery Current sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
2 Battery Current Sensor parts for the 2021 Audi S5 come from 2 brands — HELLA and WELLS.
This group includes HELLA 358158001 and WELLS 5S16132.
Buying Electrical Parts for a 2021 Audi S5
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Confirm you have the 3.0L V6 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Battery Current Sensor .
Frequently Asked Questions
How many electrical parts fit the 2021 Audi S5?
Our catalog currently lists 6 electrical parts for the 2021 Audi S5 across 2 subcategories and 6 brands, covering the 3.0L V6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2021 Audi S5?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Audi S5 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Audi S5?
Every part on this page is matched to the 3.0L V6 Turbocharged engine. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Audi S5
Electrical Parts for Other Audi S5 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.