The 1958 MG Mga has 36 ignition parts with verified fitment on this page — 8 part types and 14 brands, covering both the 1.5L L4 and the 1.6L L4. Each part includes a manufacturer part number and application notes.
On the 1958 MG Mga, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. Most of the listed parts are Spark Plug (12 parts), Ignition Coil (9 parts) and Ignition Breaker Points (4 parts). The other 5 part types cover the remaining 11 parts.
The 1958 MG Mga was sold with both the 1.5L L4 and the 1.6L L4. 23 parts fit every engine; the other 13 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1958 MG Mga ignition parts are STANDARD MOTOR PRODUCTS (9 parts), WELLS (6 parts) and DENSO (4 parts), plus 11 more brands. Quality grades include Standard Replacement, Copper / Nickel and Economy.
5 parts on this 1958 MG Mga page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS UC15T (Ignition Coil) and ACDELCO R43XLS (Spark Plug). Click any part number to see every vehicle that part fits.
Condenser / Capacitor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | LU206T | 🇺🇸 US | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | LU206 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: all 1958 Mga engines | 5H1011 | 🇺🇸 US | with Lucas DistributorStandard Duty | View on Amazon |
This table covers the capacitors used in this electrical or A/C circuit.
3 Condenser / Capacitor parts are listed for the 1958 MG Mga, from STANDARD MOTOR PRODUCTS and WELLS. All of them fit every engine offered in the 1958 Mga.
In the Economy grade, STANDARD MOTOR PRODUCTS supplies 1 part: the catalog's value-priced group. A representative part number is STANDARD MOTOR PRODUCTS LU206T.
The Standard Replacement section lists 2 options from STANDARD MOTOR PRODUCTS and WELLS — built to original-equipment specification. STANDARD MOTOR PRODUCTS LU206 is listed in this group.
Part numbers include STANDARD MOTOR PRODUCTS LU206T, STANDARD MOTOR PRODUCTS LU206 and WELLS 5H1011.
Distributor Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | LU420 | 🇺🇸 US | View on Amazon |
This table covers the Distributor caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable.
This group shows a single part: STANDARD MOTOR PRODUCTS LU420.
Distributor Rotor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | LU300 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 1.5L L4 | 4R1187 | 🇺🇸 US | with Lucas Distributor | View on Amazon |
This table covers the Distributor rotors. Typical signs include shudder under braking, or a lip at the outer edge. Do not put new pads on a rotor that is below minimum thickness.
2 Distributor Rotor parts for the 1958 MG Mga come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS. 1 part fits every engine; the other 1 is engine-specific.
Part numbers include STANDARD MOTOR PRODUCTS LU300 and WELLS 4R1187.
Ignition Breaker Points
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FACET Fits: all 1958 Mga engines | 14683MHDV | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | LU1617P | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 1.5L L4 | 4P1083 | 🇺🇸 US | with Lucas Distributor | View on Amazon |
| WELLS Fits: 1.5L L4 | 8T1008 | 🇺🇸 US | Includes Condenser | View on Amazon |
This table covers the breaker points in a points-type distributor.
4 Ignition Breaker Points parts are listed for the 1958 MG Mga, from WELLS, FACET and STANDARD MOTOR PRODUCTS. 2 parts fit every engine; the other 2 are engine-specific.
Part numbers include FACET 14683MHDV, STANDARD MOTOR PRODUCTS LU1617P and WELLS 4P1083, among others listed above.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 1958 Mga engines | UC15T | 🇺🇸 US | T-Series | View on Amazon |
| FVP Fits: all 1958 Mga engines | UC15F | 🇺🇸 US | Alternate Replacement Part | View on Amazon |
| HOLSTEIN Fits: all 1958 Mga engines | 2IGC0058 | 🇺🇸 US | View on Amazon | |
| SKP Fits: all 1958 Mga engines | SKUF3T | 🇺🇸 US | Coil Pack | View on Amazon |
| SPECTRA PREMIUM Fits: all 1958 Mga engines | C654 | 🇺🇸 US | Pack | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: all 1958 Mga engines | 48863 | 🇺🇸 US | 12 VoltInternal Resistor Coil | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 1958 Mga engines | UC15 | 🇺🇸 US | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: all 1958 Mga engines | C15 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: all 1958 Mga engines | 5C1019 | 🇺🇸 US | Used on most import products with 12 Volt system with Internal resistorUniversal 12 Volt Coil | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
9 Ignition Coil parts are listed for the 1958 MG Mga, from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 5 other brands. STANDARD MOTOR PRODUCTS UC15T carries the "Popular" badge. All of them fit every engine offered in the 1958 Mga.
Economy: 5 parts, from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS UC15T.
The Standard Replacement section: 4 options from NGK, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and 1 other brand. NGK 48863 is listed in this group.
This group includes STANDARD MOTOR PRODUCTS UC15T, FVP UC15F and HOLSTEIN 2IGC0058 and the remaining parts above.
Ignition Conversion Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 1.5L L4 | 1A4153 | 🇺🇸 US | Lucas Distributor # DM2P4, Late DM2 Distributor12 Volt | View on Amazon |
This table covers the Ignition Conversion kits.
This group shows a single part: WELLS 1A4153.
Spark Plug
Summary: Notes include pre-set gaps of 0.024", 0.025", 0.026", 0.030", 0.032", 0.036", 0.040" and 0.044". Replacement brands in this table include DENSO, CHAMPION and AUTOLITE.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: all 1958 Mga engines | R43XLS | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| CHAMPION Popular Fits: all 1958 Mga engines | 120 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.026" | View on Amazon |
| NGK Popular Fits: 1.5L L4 | 4922 | 🇺🇸 US | StandardPre-Set Gap: 0.036" | View on Amazon |
| CHAMPION Fits: all 1958 Mga engines | 123 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.025" | View on Amazon |
| DENSO Fits: 1.5L L4 | 3051 | 🇺🇸 US | U-Groove ConventionalPre-Set Gap: 0.032" | View on Amazon |
| MOTORCRAFT Fits: all 1958 Mga engines | SP436AX | 🇺🇸 US | Copper | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE Fits: all 1958 Mga engines | APP64 | 🇺🇸 US | Double PlatinumHex Size: 13/16 In | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE Fits: all 1958 Mga engines | XP64 | 🇺🇸 US | Display PackQTY2 | View on Amazon |
| DENSO Fits: 1.5L L4 | 5306 | 🇺🇸 US | Iridium PowerHex Size: 20.6 mm | View on Amazon |
| DENSO Fits: 1.5L L4 | 4709 | 🇺🇸 US | Iridium TTSolid Terminal | View on Amazon |
| SKP Fits: all 1958 Mga engines | SP1042 | 🇺🇸 US | Tapered Ground Electrode with Platinum Chip | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DENSO Fits: 1.5L L4 | 4502 | 🇺🇸 US | Platinum TTSolid Terminal | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
12 Spark Plug parts for the 1958 MG Mga come from 7 brands — DENSO, CHAMPION, AUTOLITE and 4 other brands. The "Popular" part is ACDELCO R43XLS. 7 parts fit every engine; the other 5 are engine-specific.
The Copper / Nickel section lists 6 options from CHAMPION, ACDELCO, NGK and 2 other brands — grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. ACDELCO R43XLS is listed in this group.
The Double Platinum (lasts up to 3x longer than Copper / Nickel) section lists 1 option from AUTOLITE — grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. AUTOLITE APP64 is listed in this group.
In the Iridium (lasts up to 4x longer than Copper / Nickel) grade, DENSO, AUTOLITE and SKP supply 4 parts: grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is AUTOLITE XP64.
The Platinum (lasts up to 2x longer than Copper / Nickel) section lists 1 option from DENSO — grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. DENSO 4502 is listed in this group.
Spark Plug Wire
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.5L L4 | 55437 | 🇺🇸 US | IntermotorSet | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: 1.5L L4 | 9403 | 🇺🇸 US | SetUnited-Packard | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 1.5L L4 | 9044Q | 🇺🇸 US 🇨🇦 CA | GoldSet | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.5L L4 | 29437 | 🇺🇸 US | Pro SeriesSet | View on Amazon |
This table covers the Spark Plug wires.
4 Spark Plug Wire parts are listed for the 1958 MG Mga, from STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and ACDELCO.
The Premium section lists 2 options from STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS — a step above OE specification in materials, tolerances or warranty terms. STANDARD MOTOR PRODUCTS 55437 is listed in this group.
The Standard Replacement section: 2 options from ACDELCO and STANDARD MOTOR PRODUCTS. ACDELCO 9044Q is listed in this group.
This group includes STANDARD MOTOR PRODUCTS 55437, UNITED MOTOR PRODUCTS 9403 and ACDELCO 9044Q and the remaining parts above.
Buying Ignition Parts for a 1958 MG Mga
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Some ignition 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, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Spark Plug and Ignition Coil .
Frequently Asked Questions
How many ignition parts fit the 1958 MG Mga?
Our catalog currently lists 36 ignition parts for the 1958 MG Mga across 8 subcategories and 14 brands, covering both the 1.5L L4 and the 1.6L L4. Each part is matched to the engine(s) it fits.
Do ignition parts differ between 1958 MG Mga engines?
Some do. 23 parts fit every engine; the other 13 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 ignition problems on a 1958 MG Mga?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1958 MG Mga?
Notes on this page include pre-set gaps of 0.024", 0.025", 0.026", 0.030", 0.032", 0.036", 0.040" and 0.044". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
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 1958 MG Mga 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 1958 MG Mga?
First match the engine — each row shows which engine(s) the part fits. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1958 MG Mga
Ignition Parts for Other MG Mga Years
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