This page lists one electrical switch & relay part for the 2025 BMW M3: Oil Pressure Sender / Switch from WELLS, matched to the 3.0L L6 Turbocharged — the only engine offered in the 2025 BMW M3.
On the 2025 BMW M3, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
The part number opens a page with every vehicle that part fits.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S16103 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2025 BMW M3 — WELLS 1S16103.
Buying Electrical Switch & Relay Parts for a 2025 BMW M3
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 3.0L L6 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, 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 BMW M3?
This page lists one electrical switch & relay part for the 2025 BMW M3: Oil Pressure Sender / Switch from WELLS, covering the 3.0L L6 Turbocharged engine.
What are the signs of electrical switch & relay problems on a 2025 BMW M3?
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 BMW M3 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 BMW M3?
Every part on this page is matched to the 3.0L L6 Turbocharged engine. 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 BMW M3
Electrical Switch & Relay Parts for Other BMW M3 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.