The 1978 Fiat Brava has 13 electrical switch & relay parts with verified fitment on this page — 3 part types and 9 brands, covering both the 1.8L L4 and the 2.0L L4. Each part includes a manufacturer part number and application notes.
On the 1978 Fiat Brava, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 13 listed parts are Brake Light Switch (5 parts), Oil Pressure Sender / Switch (5 parts) and Radiator Fan Switch (3 parts).
The 1978 Fiat Brava was sold with both the 1.8L L4 and the 2.0L L4. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
9 brands supply electrical switch & relay parts for the 1978 Fiat Brava, led by STANDARD MOTOR PRODUCTS (3 parts), BECK/ARNLEY (3 parts) and ULTRA-POWER (1 part), plus 6 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1978 Fiat Brava. 2 parts have it, including STANDARD MOTOR PRODUCTS SLS125 (Brake Light Switch) and STANDARD MOTOR PRODUCTS PS159 (Oil Pressure Sender / Switch). Each part number opens a page with every vehicle that part fits.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Fits: 2.0L L4 | 1S5756 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 | SLS125 | 🇺🇸 US | View on Amazon | |
| BECK/ARNLEY Fits: 2.0L L4 | 2010338 | 🇺🇸 US | View on Amazon | |
| ROSTRA Fits: 2.0L L4 | 620215 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 2.0L L4 | 1S5756 | 🇺🇸 US | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Brake Light Switch parts are listed for the 1978 Fiat Brava, from ULTRA-POWER, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 2 other brands. STANDARD MOTOR PRODUCTS SLS125 carries the "Popular" badge.
In the Economy grade, ULTRA-POWER supplies 1 part: the catalog's value-priced group. A representative part number is ULTRA-POWER 1S5756.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, ROSTRA and 1 other brand — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS125 is listed in this group.
This group includes STANDARD MOTOR PRODUCTS SLS125, ULTRA-POWER 1S5756 and BECK/ARNLEY 2010338 and the remaining parts above.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 2.0L L4 | 2OPS0134 | 🇺🇸 US | with Light | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: 2.0L L4 | OPS27 | 🇺🇸 US | with Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 | PS159 | 🇺🇸 US | with Light | View on Amazon |
| BECK/ARNLEY Fits: 2.0L L4 | 2010353 | 🇺🇸 US | with Light | View on Amazon |
| GPD Fits: 2.0L L4 | 1815401 | 🇺🇸 US | with Light | 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.
5 Oil Pressure Sender / Switch parts are listed for the 1978 Fiat Brava, from HOLSTEIN, UNITED MOTOR PRODUCTS, STANDARD MOTOR PRODUCTS and 2 other brands. STANDARD MOTOR PRODUCTS PS159 carries the "Popular" badge.
Economy: 2 parts, from HOLSTEIN and UNITED MOTOR PRODUCTS. A representative part number is HOLSTEIN 2OPS0134.
The Standard Replacement section: 3 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY and GPD. STANDARD MOTOR PRODUCTS PS159 is listed in this group.
Part numbers include STANDARD MOTOR PRODUCTS PS159, HOLSTEIN 2OPS0134 and UNITED MOTOR PRODUCTS OPS27, among others listed above.
Radiator Fan Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 2.0L L4 | 2011321 | 🇺🇸 US | View on Amazon | |
| FOUR SEASONS Fits: 2.0L L4 | 37373 | 🇺🇸 US | Temperature Switch | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 | TS100 | 🇺🇸 US | View on Amazon |
This table covers the Radiator Fan switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Radiator Fan Switch parts are listed for the 1978 Fiat Brava, from BECK/ARNLEY, FOUR SEASONS and STANDARD MOTOR PRODUCTS.
Listed part numbers: BECK/ARNLEY 2011321, FOUR SEASONS 37373 and STANDARD MOTOR PRODUCTS TS100.
Buying Electrical Switch & Relay Parts for a 1978 Fiat Brava
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: Brake Light Switch and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1978 Fiat Brava?
Our catalog currently lists 13 electrical switch & relay parts for the 1978 Fiat Brava across 3 subcategories and 9 brands, covering both the 1.8L L4 and the 2.0L L4. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 1978 Fiat Brava 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 1978 Fiat Brava?
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 1978 Fiat Brava 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 1978 Fiat Brava?
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 1978 Fiat Brava
Electrical Switch & Relay Parts for Other Fiat Brava 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.