This page lists 52 electrical parts for the 1978 MG MGB, across 7 part types, covering the 1.8L L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1978 MG MGB, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 38 parts of the 52 listed are Horn (19 parts), Alternator / Generator (10 parts) and Battery Cable (9 parts). The other 4 part types cover the remaining 14 parts.
Every part on this page is matched to the 1.8L L4 — the only engine offered in the 1978 MG MGB.
The most listed brands for 1978 MG MGB electrical parts are FIAMM (13 parts), STANDARD MOTOR PRODUCTS (9 parts) and DEKA (8 parts), plus 10 more brands. Quality grades include Remanufactured, Standard Replacement and Accessory Replacement.
11 parts on this 1978 MG MGB page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including WAI GLOBAL 14037N (Alternator / Generator) and DEKA 9A78DT (Battery). Click any part number to see every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular | 14037N | 🇺🇸 US 🇨🇦 CA | Lucas IR/EF43 Amps | View on Amazon |
| WAI GLOBAL Popular | 14050N | 🇺🇸 US 🇨🇦 CA | Lucas IR/EF43 or 42 Amps | View on Amazon |
| ÜRO PARTS | AL050 | 🇺🇸 US 🇨🇦 CA | 43 Amp | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | AL300X | 🇺🇸 US 🇨🇦 CA | RemanufacturedDoes Not Include Pulley | View on Amazon |
| PURE ENERGY | 14037 | 🇺🇸 US 🇨🇦 CA | RemanufacturedDoes Not Include Pulley | View on Amazon |
| PURE ENERGY | 14050 | 🇺🇸 US 🇨🇦 CA | RemanufacturedDoes Not Include Pulley | View on Amazon |
| REMY | 14050 | 🇺🇸 US 🇨🇦 CA | Premium RemanufacturedDoes Not Include Pulley | View on Amazon |
| REMY | 14037 | 🇺🇸 US 🇨🇦 CA | Premium RemanufacturedDoes Not Include Pulley | View on Amazon |
| TERREPOWER | 14050 | 🇺🇸 US 🇨🇦 CA | RemanufacturedDoes Not Include Pulley | View on Amazon |
| TERREPOWER | 14037 | 🇺🇸 US 🇨🇦 CA | RemanufacturedDoes Not Include Pulley | 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.
10 Alternator / Generator parts are listed for the 1978 MG MGB, from WAI GLOBAL, PURE ENERGY, REMY and 3 other brands. WAI GLOBAL 14037N carries the "Popular" badge.
In the New grade, WAI GLOBAL and ÜRO PARTS supply 3 parts: brand-new units rather than rebuilt ones. A representative part number is WAI GLOBAL 14037N.
In the Remanufactured grade, PURE ENERGY, REMY, TERREPOWER and 1 other brand supply 7 parts: factory-rebuilt units with new wear components. A representative part number is BOSCH AL300X.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular | 9A78DT | 🇺🇸 US 🇨🇦 CA | IntimidatorAGM | View on Amazon |
| DEKA | 9A34 | 🇺🇸 US 🇨🇦 CA | IntimidatorAGM | View on Amazon |
| EXIDE | MX24 | 🇺🇸 US 🇨🇦 CA | Marathon MaxBCI Group 24 | View on Amazon |
| FVP | P24AGM | 🇺🇸 US 🇨🇦 CA | Platinum AGMBCI Group: 24 | View on Amazon |
| FVP | P24RAGM | 🇺🇸 US 🇨🇦 CA | Platinum AGMBCI Group: 24 | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
5 Battery parts for the 1978 MG MGB come from 3 brands — DEKA, FVP and EXIDE. The "Popular" part is DEKA 9A78DT.
This group includes DEKA 9A78DT, DEKA 9A34 and EXIDE MX24 and the remaining parts above.
Battery Cable
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular | 00802 | 🇺🇸 US 🇨🇦 CA | Black4 Gauge | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | 7154C | 🇺🇸 US 🇨🇦 CA | Federal Wire | View on Amazon |
| ACDELCO | 4BC16 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| DEKA | 00801 | 🇺🇸 US 🇨🇦 CA | Black4 Gauge | View on Amazon |
| DEKA | 00295 | 🇺🇸 US 🇨🇦 CA | Red4 Gauge | View on Amazon |
| DEKA | 00296 | 🇺🇸 US 🇨🇦 CA | Red4 Gauge | View on Amazon |
| STANDARD MOTOR PRODUCTS | 7244SC | 🇺🇸 US 🇨🇦 CA | Length: 24"Federal Wire | View on Amazon |
| STANDARD MOTOR PRODUCTS | A244L | 🇺🇸 US 🇨🇦 CA | 24" Length | View on Amazon |
| STANDARD MOTOR PRODUCTS | A164 | 🇺🇸 US 🇨🇦 CA | 16 Length | View on Amazon |
This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early.
9 Battery Cable parts are listed for the 1978 MG MGB, from DEKA, STANDARD MOTOR PRODUCTS and ACDELCO. DEKA 00802 carries the "Popular" badge.
Part numbers include DEKA 00802, STANDARD MOTOR PRODUCTS 7154C and ACDELCO 4BC16, among others listed above.
Battery Terminal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA | 00350 | 🇺🇸 US 🇨🇦 CA | Top Post Terminal | View on Amazon |
| DEKA | 01056 | 🇺🇸 US 🇨🇦 CA | Top Post Terminal Lead Free | View on Amazon |
This table covers the terminals and clamps that connect cables to the battery posts.
2 Battery Terminal parts for the 1978 MG MGB come from DEKA.
This group includes DEKA 00350 and DEKA 01056.
Horn
Accessory Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 7210223 | 🇺🇸 US 🇨🇦 CA | Accessory HornFreeway Blaster | View on Amazon |
| FIAMM | 7211223 | 🇺🇸 US 🇨🇦 CA | Accessory Horn (Louder)FWY Blaster | View on Amazon |
| FIAMM | 72112 | 🇺🇸 US 🇨🇦 CA | Freeway BlasterAccessory Horn | View on Amazon |
| FIAMM | 7410024 | 🇺🇸 US 🇨🇦 CA | Accessory HornEl Grande | View on Amazon |
| FIAMM | 6602023 | 🇺🇸 US 🇨🇦 CA | Accessory HornRed | View on Amazon |
| FIAMM | 6602523 | 🇺🇸 US 🇨🇦 CA | Accessory HornChrome | View on Amazon |
| FIAMM | 6604523 | 🇺🇸 US 🇨🇦 CA | Ultimate Blast HornAccessory Horn | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 7201223 | 🇺🇸 US 🇨🇦 CA | OE Replacement Tone2 Terminal Connection (Cut off and reuse OE Connector) | View on Amazon |
| FIAMM Popular | 7200223 | 🇺🇸 US 🇨🇦 CA | OE Replacement Tone2 Terminal Blade Connection (Cut off and reuse OE Connector) | View on Amazon |
| FIAMM Popular | 7250522 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| ACDELCO | E1905E | 🇺🇸 US 🇨🇦 CA | Gold2 Pin Connection | View on Amazon |
| FIAMM | 7421122 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| FIAMM | 7421322 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors | View on Amazon |
| FIAMM | 7250622 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| STANDARD MOTOR PRODUCTS | HN15 | 🇺🇸 US 🇨🇦 CA | High ToneUniversal | View on Amazon |
| STANDARD MOTOR PRODUCTS | HN16T | 🇺🇸 US 🇨🇦 CA | T-SeriesUniversal | View on Amazon |
| STANDARD MOTOR PRODUCTS | HN17T | 🇺🇸 US 🇨🇦 CA | T-SeriesUniversal | View on Amazon |
| STANDARD MOTOR PRODUCTS | HN18 | 🇺🇸 US 🇨🇦 CA | High Output Low Tone | View on Amazon |
| STANDARD MOTOR PRODUCTS | HN16 | 🇺🇸 US 🇨🇦 CA | Low ToneUniversal | View on Amazon |
This table covers the horns mounted in the front of the vehicle.
19 Horn parts for the 1978 MG MGB come from 3 brands — FIAMM, STANDARD MOTOR PRODUCTS and ACDELCO. The "Popular" part is FIAMM 7210223.
The Accessory Replacement section lists 7 options from FIAMM — grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. FIAMM 7210223 is listed in this group.
In the Standard Replacement grade, FIAMM, STANDARD MOTOR PRODUCTS and ACDELCO supply 12 parts: built to original-equipment specification. A representative part number is FIAMM 7201223.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL | 16164N | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PURE ENERGY Popular | 16164 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| REMY Popular | 16164 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| BOSCH | SR193X | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| FVP | 16164 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| TERREPOWER | 16164 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
6 Starter Motor parts are listed for the 1978 MG MGB, from WAI GLOBAL, PURE ENERGY, REMY and 3 other brands. PURE ENERGY 16164 carries the "Popular" badge.
New: 1 part, from WAI GLOBAL. A representative part number is WAI GLOBAL 16164N.
Remanufactured: 5 parts, from PURE ENERGY, REMY, BOSCH and 2 other brands. A representative part number is PURE ENERGY 16164.
Listed part numbers: PURE ENERGY 16164 and WAI GLOBAL 16164N, plus the other parts above.
Starter Solenoid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1M1045 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Starter solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid.
One part is listed for the 1978 MG MGB — WELLS 1M1045.
Buying Electrical Parts for a 1978 MG MGB
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 1.8L L4 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: Horn and Alternator / Generator .
Frequently Asked Questions
How many electrical parts fit the 1978 MG MGB?
Our catalog currently lists 52 electrical parts for the 1978 MG MGB across 7 subcategories and 13 brands, covering the 1.8L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 1978 MG MGB?
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 1978 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 1978 MG MGB?
Every part on this page is matched to the 1.8L L4 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 1978 MG MGB
Electrical Parts for Other MG MGB Years
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