1978 MG MGB Parts
Our catalog shows a single engine for the 1978 MG MGB: the 1.8L L4. All 630 parts listed for this model year are matched to it — browse them by category below.
Use the part number on every part as your anchor: match it to the number on your old part, or use it to cross-reference an aftermarket equivalent for an OEM part that's discontinued or overpriced.
Browse by Engine
Not sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.
Parts by Category
Belt Drive Parts
11 parts · 1 subcategory · 4 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.Body & Lamp Assembly Parts
14 parts · 10 subcategories · 3 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.Brake & Wheel Hub Parts
90 parts · 13 subcategories · 24 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
64 parts · 9 subcategories · 18 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Drivetrain Parts
41 parts · 4 subcategories · 12 brands Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.Electrical Parts
52 parts · 7 subcategories · 13 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Electrical Bulb & Socket Parts
92 parts · 11 subcategories · 5 brands Verified fitment Covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.Electrical Connector Parts
2 parts · 2 subcategories · 2 brands Verified fitment Supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.Electrical Switch & Relay Parts
7 parts · 4 subcategories · 5 brands Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.Engine Parts
87 parts · 31 subcategories · 24 brands Verified fitment Covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.Exhaust & Emission Parts
9 parts · 4 subcategories · 8 brands Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.Fuel & Air Parts
31 parts · 11 subcategories · 21 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.Heat & Air Conditioning Parts
3 parts · 1 subcategory · 2 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.Ignition Parts
46 parts · 10 subcategories · 16 brands Verified fitment Delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.Interior Parts
15 parts · 6 subcategories · 4 brands Verified fitment Covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.Literature Parts
1 part · 1 subcategory · 1 brand Verified fitment Covers the printed and reference material for the vehicle — owner literature, service manuals and guides.Steering Parts
8 parts · 3 subcategories · 3 brands Verified fitment Connects driver to road through the rack, pump, tie rods, and column components.Suspension Parts
11 parts · 7 subcategories · 4 brands Verified fitment Controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.Automatic Transmission Parts
11 parts · 8 subcategories · 6 brands Verified fitment Covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.Manual Transmission Parts
28 parts · 14 subcategories · 14 brands Verified fitment Covers the manual gearbox and clutch system — discs, pressure plates, flywheels, slave and master cylinders, shift components.Wiper & Washer Parts
7 parts · 2 subcategories · 3 brands Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.Confirm your configuration
Other MG MGB Years
Getting Fitment Right on the 1978 MG MGB
The 1978 MG MGB shipped with a single engine — the 1.8L L4 — which keeps fitment straightforward: all 630 parts listed for this model year are matched to that configuration. What still deserves attention is the notes column on each part, where position (front/rear, left/right), trim and production-date qualifiers live.
OEM-grade and aftermarket brands are listed together wherever both publish fitment for the 1978 MG MGB, each with a full part number. That makes the practical workflow simple: find the subcategory, match the part number against your old part or repair quote, then choose the brand and grade that fits how the vehicle is used.
Frequently Asked Questions
How many parts fit the 1978 MG MGB?
We list 630 parts for the 1978 MG MGB, organized into 21 categories. Every part includes the brand, manufacturer part number and fitment notes.
Which engine does the 1978 MG MGB have?
A single engine is listed for this model year: the 1.8L L4. Every part listed for the 1978 MG MGB is matched to it, so there's no engine ambiguity — just check the notes column for position and trim qualifiers.
Are OEM and aftermarket parts both available for the 1978 MG MGB?
Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.
How do I verify a part number fits my 1978 MG MGB?
Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.
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.