1973 MG MGB Electrical Parts

Engine:

Showing parts for every engine. Select an engine to see only what fits.

The 1973 MG MGB has 48 electrical parts with verified fitment on this page — 7 part types and 15 brands, covering both the 1.8L L4 and the 3.5L V8. Each part includes a manufacturer part number and application notes.

The electrical system on the 1973 MG MGB covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. The largest groups are Horn (19 parts), Battery Cable (12 parts) and Alternator / Generator (6 parts). The other 4 part types cover the remaining 11 parts.

Alternator / Generator

New

Brand Part Number Markets Notes Buy
ÜRO PARTS Popular Fits: 1.8L L4 AL029
🇺🇸 US 🇨🇦 CA
43 AmpIncludes Pulley
Fitment notes — ÜRO PARTS AL029
43 AmpIncludes Pulley
43 AmpsPlug Has Two Big Spades and One Small Spade
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Remanufactured

Brand Part Number Markets Notes Buy
FVP Fits: 1.8L L4 14029
🇺🇸 US 🇨🇦 CA
RemanufacturedDoes Not Include Pulley
Fitment notes — FVP 14029
RemanufacturedDoes Not Include Pulley
36 Amps
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PURE ENERGY Fits: 1.8L L4 14029
🇺🇸 US 🇨🇦 CA
RemanufacturedDoes Not Include Pulley
Fitment notes — PURE ENERGY 14029
RemanufacturedDoes Not Include Pulley
36 Amps
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REMY Fits: 1.8L L4 14013
🇺🇸 US 🇨🇦 CA
Premium RemanufacturedDoes Not Include Pulley
Fitment notes — REMY 14013
Premium RemanufacturedDoes Not Include Pulley
36 Amps
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TERREPOWER Fits: 1.8L L4 14029
🇺🇸 US 🇨🇦 CA
RemanufacturedDoes Not Include Pulley
Fitment notes — TERREPOWER 14029
RemanufacturedDoes Not Include Pulley
36 Amps
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Brand Part Number Markets Notes Buy
ÜRO PARTS Fits: 3.5L V8 AL029
🇺🇸 US
43 AmpIncludes Pulley
Fitment notes — ÜRO PARTS AL029
43 AmpIncludes Pulley
43 AmpsPlug Has Two Big Spades and One Small Spade
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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.

Alternator / Generator End Bearing

Brand Part Number Markets Notes Buy
SCHAEFFLER Fits: all 1973 MGB engines 6202
🇺🇸 US 🇨🇦 CA
Fits Front35 mm Outside Diameter
Fitment notes — SCHAEFFLER 6202
Fits:
Front35 mm Outside Diameter15 MM Inside DiameterDrive Endor GT Model35 mm Outside Diameter15 MM Inside DiameterDrive End
Front35 mm Outside Diameter15 MM Inside DiameterDrive End
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SKF Fits: all 1973 MGB engines 6202J
🇺🇸 US 🇨🇦 CA
Drive End
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This table covers the bearings in the alternator housing. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.

Battery Cable

Brand Part Number Markets Notes Buy
DEKA Popular Fits: 1.8L L4 00802
🇺🇸 US 🇨🇦 CA
Black4 Gauge
Fitment notes — DEKA 00802
Black4 Gauge1 Lead25 In Length
Negative
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STANDARD MOTOR PRODUCTS Popular Fits: 1.8L L4 A224
🇺🇸 US 🇨🇦 CA
Length: 22
Fitment notes — STANDARD MOTOR PRODUCTS A224
Length: 22
PositiveBATTERY TO SWITCH
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STANDARD MOTOR PRODUCTS Popular Fits: 1.8L L4 B14
🇺🇸 US 🇨🇦 CA
NegativeBATTERY TO GROUND
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DEKA Fits: 1.8L L4 00801
🇺🇸 US 🇨🇦 CA
Black4 Gauge
Fitment notes — DEKA 00801
Black4 Gauge20 In Length
NegativeAuxiliary Lead Wires May Not be Required
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DEKA Fits: 1.8L L4 00295
🇺🇸 US 🇨🇦 CA
Red4 Gauge
Fitment notes — DEKA 00295
Red4 Gauge1 Lead25 In Length
PositiveAuxiliary Lead Wires May Not be Required.
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DEKA Fits: 1.8L L4 00296
🇺🇸 US 🇨🇦 CA
Red4 Gauge
Fitment notes — DEKA 00296
Red4 Gauge1 Lead32 In Length
PositiveAuxiliary Lead Wires May Not be Required.
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STANDARD MOTOR PRODUCTS Fits: 1.8L L4 7244SC
🇺🇸 US 🇨🇦 CA
Length: 24"Federal Wire
Fitment notes — STANDARD MOTOR PRODUCTS 7244SC
Length: 24"Federal Wire
PositiveSwitch To Starter
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STANDARD MOTOR PRODUCTS Fits: 1.8L L4 A194L
🇺🇸 US 🇨🇦 CA
NegativeEngine Ground To Frame
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STANDARD MOTOR PRODUCTS Fits: 1.8L L4 A244L
🇺🇸 US 🇨🇦 CA
24" Length
Fitment notes — STANDARD MOTOR PRODUCTS A244L
24" Length
PositiveSwitch To Starter
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STANDARD MOTOR PRODUCTS Fits: 1.8L L4 7254C
🇺🇸 US 🇨🇦 CA
Federal Wire
Fitment notes — STANDARD MOTOR PRODUCTS 7254C
Federal Wire
PositiveBATTERY TO SWITCH
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UNITED MOTOR PRODUCTS Fits: 1.8L L4 4424
🇺🇸 US 🇨🇦 CA
4-GaugeSwitch To Starter
Fitment notes — UNITED MOTOR PRODUCTS 4424
4-GaugeSwitch To Starter
Switch To StarterGT24" 2-eyelet
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UNITED MOTOR PRODUCTS Fits: 1.8L L4 4219N
🇺🇸 US 🇨🇦 CA
19" Length4-Gauge
Fitment notes — UNITED MOTOR PRODUCTS 4219N
19" Length4-GaugeTop Mount
Negative
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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.

Battery Terminal

Brand Part Number Markets Notes Buy
DEKA Fits: 1.8L L4 00350
🇺🇸 US 🇨🇦 CA
Top Post Terminal
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DEKA Fits: 1.8L L4 01056
🇺🇸 US 🇨🇦 CA
Top Post Terminal Lead Free
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This table covers the terminals and clamps that connect cables to the battery posts.

Horn

Accessory Replacement

Brand Part Number Markets Notes Buy
FIAMM Popular Fits: all 1973 MGB engines 7210223
🇺🇸 US 🇨🇦 CA
Accessory HornFreeway Blaster
Fitment notes — FIAMM 7210223
Accessory HornFreeway Blaster133 dB
High Note
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FIAMM Fits: all 1973 MGB engines 7211223
🇺🇸 US 🇨🇦 CA
Accessory Horn (Louder)FWY Blaster
Fitment notes — FIAMM 7211223
Accessory Horn (Louder)FWY Blaster130 dB
Low Note
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FIAMM Fits: 1.8L L4 72112
🇺🇸 US 🇨🇦 CA
Freeway BlasterAccessory Horn
Fitment notes — FIAMM 72112
Freeway BlasterAccessory Horn133 dB
Low Note
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FIAMM Fits: all 1973 MGB engines 7410024
🇺🇸 US 🇨🇦 CA
Accessory HornEl Grande
Fitment notes — FIAMM 7410024
Accessory HornEl Grande128 dB
High and Low Notewith Red Caps and Grills
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FIAMM Fits: all 1973 MGB engines 6602023
🇺🇸 US 🇨🇦 CA
Accessory HornRed
Fitment notes — FIAMM 6602023
Accessory HornRedTwo Trumpet Riviera Horn Kit
Two Tone Air Horn with Compressor
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FIAMM Fits: all 1973 MGB engines 6602523
🇺🇸 US 🇨🇦 CA
Accessory HornChrome
Fitment notes — FIAMM 6602523
Accessory HornChromeTwo Trumpet Riviera Horn Kit
Two Tone Air Horn with Compressor
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FIAMM Fits: all 1973 MGB engines 6604523
🇺🇸 US 🇨🇦 CA
Ultimate Blast HornAccessory Horn
Fitment notes — FIAMM 6604523
Ultimate Blast HornAccessory Horn
Compact Two Tone Air Horn with Compressor
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Standard Replacement

Brand Part Number Markets Notes Buy
FIAMM Popular Fits: all 1973 MGB engines 7201223
🇺🇸 US 🇨🇦 CA
OE Replacement Tone2 Terminal Connection (Cut off and reuse OE Connector)
Fitment notes — FIAMM 7201223
OE Replacement Tone2 Terminal Connection (Cut off and reuse OE Connector)
Low Note
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FIAMM Popular Fits: all 1973 MGB engines 7200223
🇺🇸 US 🇨🇦 CA
OE Replacement Tone2 Terminal Blade Connection (Cut off and reuse OE Connector)
Fitment notes — FIAMM 7200223
OE Replacement Tone2 Terminal Blade Connection (Cut off and reuse OE Connector)
High Note
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FIAMM Popular Fits: all 1973 MGB engines 7250522
🇺🇸 US 🇨🇦 CA
OE Replacement Horn KitIncludes OE Connectors & L Bracket
Fitment notes — FIAMM 7250522
OE Replacement Horn KitIncludes OE Connectors & L Bracket
High Note
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ACDELCO Fits: all 1973 MGB engines E1905E
🇺🇸 US 🇨🇦 CA
Gold2 Pin Connection
Fitment notes — ACDELCO E1905E
Gold2 Pin Connection
High Output Low Tone
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FIAMM Fits: all 1973 MGB engines 7421122
🇺🇸 US 🇨🇦 CA
OE Replacement Horn KitIncludes OE Connectors & L Bracket
Fitment notes — FIAMM 7421122
OE Replacement Horn KitIncludes OE Connectors & L Bracket
TR98 Low Note
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FIAMM Fits: all 1973 MGB engines 7421322
🇺🇸 US 🇨🇦 CA
OE Replacement Horn KitIncludes OE Connectors
Fitment notes — FIAMM 7421322
OE Replacement Horn KitIncludes OE ConnectorsService Kit
TR98 High Note
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FIAMM Fits: all 1973 MGB engines 7250622
🇺🇸 US 🇨🇦 CA
OE Replacement Horn KitIncludes OE Connectors & L Bracket
Fitment notes — FIAMM 7250622
OE Replacement Horn KitIncludes OE Connectors & L Bracket
Low Note
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STANDARD MOTOR PRODUCTS Fits: all 1973 MGB engines HN15
🇺🇸 US 🇨🇦 CA
High ToneUniversal
Fitment notes — STANDARD MOTOR PRODUCTS HN15
High ToneUniversal
High Tone
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STANDARD MOTOR PRODUCTS Fits: all 1973 MGB engines HN16T
🇺🇸 US 🇨🇦 CA
T-SeriesUniversal
Fitment notes — STANDARD MOTOR PRODUCTS HN16T
T-SeriesUniversalLow Tone
Low Tone
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STANDARD MOTOR PRODUCTS Fits: all 1973 MGB engines HN17T
🇺🇸 US 🇨🇦 CA
T-SeriesUniversal
Fitment notes — STANDARD MOTOR PRODUCTS HN17T
T-SeriesUniversal
High Output High Tone
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STANDARD MOTOR PRODUCTS Fits: all 1973 MGB engines HN18
🇺🇸 US 🇨🇦 CA
High Output Low Tone
Fitment notes — STANDARD MOTOR PRODUCTS HN18
High Output Low Tone
High Output Low Tone
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STANDARD MOTOR PRODUCTS Fits: all 1973 MGB engines HN16
🇺🇸 US 🇨🇦 CA
Low ToneUniversal
Fitment notes — STANDARD MOTOR PRODUCTS HN16
Low ToneUniversal
Low Tone
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This table covers the horns mounted in the front of the vehicle.

Starter Motor

New

Brand Part Number Markets Notes Buy
WAI GLOBAL Fits: 1.8L L4 16164N
🇺🇸 US 🇨🇦 CA
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Remanufactured

Brand Part Number Markets Notes Buy
PURE ENERGY Popular Fits: 1.8L L4 16164
🇺🇸 US 🇨🇦 CA
Remanufactured
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REMY Popular Fits: 1.8L L4 16164
🇺🇸 US 🇨🇦 CA
Remanufactured
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BOSCH Fits: 1.8L L4 SR193X
🇺🇸 US 🇨🇦 CA
Remanufactured
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FVP Fits: 1.8L L4 16164
🇺🇸 US 🇨🇦 CA
Remanufactured
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TERREPOWER Fits: 1.8L L4 16164
🇺🇸 US 🇨🇦 CA
Remanufactured
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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.

Starter Solenoid

Brand Part Number Markets Notes Buy
WELLS Fits: all 1973 MGB engines 1M1045
🇺🇸 US 🇨🇦 CA
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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.

Buying Electrical Parts for a 1973 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.

  • Match the engine first. Some electrical parts fit every engine; others are 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, 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 Battery Cable .

Frequently Asked Questions

How many electrical parts fit the 1973 MG MGB?

Our catalog currently lists 48 electrical parts for the 1973 MG MGB across 7 subcategories and 15 brands, covering both the 1.8L L4 and the 3.5L V8. Each part is matched to the engine(s) it fits.

Do electrical parts differ between 1973 MG MGB engines?

Some do. 21 parts fit every engine; the other 27 are engine-specific. Each row (and the filter at the top) shows which. 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 problems on a 1973 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 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 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 1973 MG MGB

Electrical 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.