This page lists 3 electrical switch & relay parts for the 1973 MG MGB, across 2 part types, covering both the 1.8L L4 and the 3.5L V8. Every part shows its brand, manufacturer part number and fitment notes.
On the 1973 MG MGB, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 3 listed parts are Fuel Pump Cutoff Switch (2 parts) and Ignition Starter Switch (1 part).
The 1973 MG MGB was sold with both the 1.8L L4 and the 3.5L V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1973 MG MGB electrical switch & relay parts are ACDELCO (1 part), STANDARD MOTOR PRODUCTS (1 part) and ÜRO PARTS (1 part).
Each part number listed for the 1973 MG MGB opens a page with every vehicle that part fits.
Fuel Pump Cutoff Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 3.5L V8 | D1876D | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.5L V8 | FV7 | 🇺🇸 US | View on Amazon |
This table covers the Fuel Pump Cutoff 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.
2 Fuel Pump Cutoff Switch parts for the 1973 MG MGB come from 2 brands — ACDELCO and STANDARD MOTOR PRODUCTS.
This group includes ACDELCO D1876D and STANDARD MOTOR PRODUCTS FV7.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: 3.5L V8 | BHA5292 | 🇺🇸 US | View on Amazon |
This table covers the ignition switches that feed the starter circuit. 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.
One part is listed for the 1973 MG MGB — ÜRO PARTS BHA5292.
Buying Electrical Switch & Relay Parts for a 1973 MG MGB
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: Fuel Pump Cutoff Switch and Ignition Starter Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1973 MG MGB?
Our catalog currently lists 3 electrical switch & relay parts for the 1973 MG MGB across 2 subcategories and 3 brands, covering both the 1.8L L4 and the 3.5L V8. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 1973 MG MGB 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 1973 MG MGB?
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 1973 MG MGB 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 1973 MG MGB?
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 1973 MG MGB
Electrical Switch & Relay Parts for Other MG MGB 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.