12 Electrical switch & relay parts are listed for the 2025 Audi A3, in 1 part type, covering both the 1.4L L4 Turbocharged and the 2.0L L4 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The switch and relay system on the 2025 Audi A3 covers the switches, relays and flashers that route power to everything the driver touches. Every listed part is Oil Pressure Sender / Switch.
The 2025 Audi A3 was sold with both the 1.4L L4 Turbocharged and the 2.0L L4 Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2025 Audi A3 electrical switch & relay parts are HELLA (4 parts), WELLS (3 parts) and STANDARD MOTOR PRODUCTS (2 parts), plus 3 more brands. Quality grades include Standard Replacement and Economy.
3 parts on this 2025 Audi A3 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including REIN ELP0078 (Oil Pressure Sender / Switch) and HELLA 008280001 (Oil Pressure Sender / Switch). Click any part number to see every vehicle that part fits.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Popular Fits: 2.0L L4 Turbocharged | ELP0078 | 🇺🇸 US 🇨🇦 CA | Brown, with .55-.85 Bar | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged | 2561061 | 🇺🇸 US 🇨🇦 CA | Color-Brown | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular Fits: 2.0L L4 Turbocharged | 008280001 | 🇺🇸 US | 1-Pin ConnectorColor: Green or Brown | View on Amazon |
| HELLA Popular Fits: 2.0L L4 Turbocharged | 008280031 | 🇺🇸 US | 1-Pin ConnectorColor: Brown | View on Amazon |
| HELLA Fits: 2.0L L4 Turbocharged | 009600241 | 🇺🇸 US | 1-Pin ConnectorColor: Black or Color: Blue | View on Amazon |
| HELLA Fits: 2.0L L4 Turbocharged | 009600281 | 🇺🇸 US | 1-Pin ConnectorHousing Color: Green | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | PS665 | 🇲🇽 MX | BlackColor: Green | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S16087 | 🇺🇸 US 🇨🇦 CA | Lower0.3 - 0.6 Bar | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S12101 | 🇺🇸 US 🇨🇦 CA | Lower2.15 - 2.95 Bar | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 2.0L L4 Turbocharged | 2OPS0303 | 🇺🇸 US 🇨🇦 CA | Lower2,15-2.95 Bar | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.4L L4 Turbocharged | PS665 | 🇲🇽 MX | BlackColor: Green | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S17518 | 🇺🇸 US 🇨🇦 CA | Upper0.55 - 0.85 Bar | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
12 Oil Pressure Sender / Switch parts for the 2025 Audi A3 come from 6 brands — HELLA, WELLS, STANDARD MOTOR PRODUCTS and 3 other brands. The "Popular" part is REIN ELP0078.
The Economy section lists 2 options from REIN and WALKER PRODUCTS — the catalog's value-priced group. REIN ELP0078 is listed in this group.
In the Standard Replacement grade, HELLA, WELLS and STANDARD MOTOR PRODUCTS supply 7 parts: built to original-equipment specification. A representative part number is HELLA 008280001.
3 further parts sit outside the graded sections, with the same engine-level match.
Buying Electrical Switch & Relay Parts for a 2025 Audi A3
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Match the engine first. Every electrical switch & relay part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2025 Audi A3?
Our catalog currently lists 12 electrical switch & relay parts for the 2025 Audi A3 across 1 subcategory and 6 brands, covering both the 1.4L L4 Turbocharged and the 2.0L L4 Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 2025 Audi A3 engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical switch & relay problems on a 2025 Audi A3?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
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 2025 Audi A3 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 2025 Audi A3?
First match the engine — each row shows which engine(s) the part fits. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Audi A3
Electrical Switch & Relay Parts for Other Audi A3 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.