The 1959 MG Mga has 44 cooling system parts with verified fitment on this page — 5 part types and 10 brands, covering both the 1.5L L4 and the 1.6L L4. Each part includes a manufacturer part number and application notes.
On the 1959 MG Mga, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. 41 parts of the 44 listed are Thermostat (21 parts), Coolant / Antifreeze (17 parts) and Radiator Cap (3 parts). The other 2 part types cover the remaining 3 parts.
The 1959 MG Mga was sold with both the 1.5L L4 and the 1.6L L4. 38 parts fit every engine; the other 6 are engine-specific. Each part shows which engine(s) it fits.
10 brands supply cooling system parts for the 1959 MG Mga, led by MOTORAD (15 parts), PEAK (7 parts) and PRESTONE (6 parts), plus 7 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1959 MG Mga. 9 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and MOTORAD 300180 (Thermostat). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 1959 Mga engines | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 1959 Mga engines | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: all 1959 Mga engines | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: all 1959 Mga engines | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: all 1959 Mga engines | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 1959 Mga engines | ZXG051 | 🇺🇸 US | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 1959 Mga engines | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: all 1959 Mga engines | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: all 1959 Mga engines | PXA1GAL | 🇺🇸 US | 1 GallonGlobal Lifetime | View on Amazon |
| PRESTONE Fits: all 1959 Mga engines | AF6110 | 🇺🇸 US | MAX Original EquipmentEuropean Blue | View on Amazon |
| PRESTONE Fits: all 1959 Mga engines | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 1959 Mga engines | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: all 1959 Mga engines | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1959 Mga engines | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1959 Mga engines | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1959 Mga engines | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: all 1959 Mga engines | AF3300 | 🇺🇸 US | Prime Conventional Green 1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
17 Coolant / Antifreeze parts are listed for the 1959 MG Mga, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1959 Mga.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, FVP, PRESTONE, PEAK and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.
The Heavy Duty section lists 1 option from VALVOLINE — rated for severe service. VALVOLINE ZXG051 is listed in this group.
The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.
Radiator Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: all 1959 Mga engines | RC0073 | 🇺🇸 US | View on Amazon | |
| MOTORAD Fits: 1.5L L4 | T5 | 🇺🇸 US | StandardPressure Rating: 4.0 PS | View on Amazon |
| MOTORAD Fits: 1.5L L4 | 100205 | 🇺🇸 US | StandardPressure Rating: 4 PS | View on Amazon |
This table covers the caps that hold system pressure at the radiator or reservoir neck. 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.
3 Radiator Cap parts are listed for the 1959 MG Mga, from MOTORAD and CALORSTAT. 1 part fits every engine; the other 2 are engine-specific.
This group includes CALORSTAT RC0073, MOTORAD T5 and MOTORAD 100205.
Radiator Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: all 1959 Mga engines | GRH305 | 🇺🇸 US | UPPER | View on Amazon |
This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle.
This group shows a single part: ÜRO PARTS GRH305.
Thermostat
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: all 1959 Mga engines | 300180 | 🇺🇸 US | Economy | View on Amazon |
| GATES Fits: all 1959 Mga engines | 33508 | 🇺🇸 US | Economy | View on Amazon |
| GATES Fits: all 1959 Mga engines | 33509 | 🇺🇸 US | Economy | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | 300160 | 🇺🇸 US | Economy | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | 300195 | 🇺🇸 US | Economy | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 1959 Mga engines | 5200160 | 🇺🇸 US | Ultra Stat | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | 5200180 | 🇺🇸 US | Ultra Stat | View on Amazon |
Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: all 1959 Mga engines | 2000160 | 🇺🇸 US | High Flow | View on Amazon |
| MOTORAD Popular Fits: all 1959 Mga engines | 2000180 | 🇺🇸 US | High Flow | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | MRD100 | 🇺🇸 US | Racing Thermostat | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 1959 Mga engines | 7200180 | 🇺🇸 US | Fail-Safe | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | 7200160 | 🇺🇸 US | Fail-Safe | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Popular Fits: all 1959 Mga engines | 200195 | 🇺🇸 US | Standard | View on Amazon |
| MOTORAD Popular Fits: all 1959 Mga engines | 200180 | 🇺🇸 US | Standard | View on Amazon |
| BECK/ARNLEY Fits: 1.6L L4 | 1430156 | 🇺🇸 US | Twin CAMAlternate Temperature | View on Amazon |
| BECK/ARNLEY Fits: 1.6L L4 | 1430149 | 🇺🇸 US | Twin CAMAlternate Temperature | View on Amazon |
| BECK/ARNLEY Fits: 1.6L L4 | 1430131 | 🇺🇸 US | Twin CAMOE Temperature | View on Amazon |
| GATES Fits: all 1959 Mga engines | 33009 | 🇺🇸 US | OE Type | View on Amazon |
| GATES Fits: all 1959 Mga engines | 33006 | 🇺🇸 US | OE Type | View on Amazon |
| GATES Fits: all 1959 Mga engines | 33008 | 🇺🇸 US | OE Type | View on Amazon |
| MOTORAD Fits: all 1959 Mga engines | 200160 | 🇺🇸 US | Standard | View on Amazon |
This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part.
21 Thermostat parts for the 1959 MG Mga come from 3 brands — MOTORAD, GATES and BECK/ARNLEY. The "Popular" part is MOTORAD 300180. 18 parts fit every engine; the other 3 are engine-specific.
The Economy section: 5 options from MOTORAD and GATES. MOTORAD 300180 is listed in this group.
Heavy Duty: 2 parts, from MOTORAD. A representative part number is MOTORAD 5200160.
The Performance section lists 3 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2000160 is listed in this group.
Premium: 2 parts, from MOTORAD. A representative part number is MOTORAD 7200180.
Standard Replacement: 9 parts, from MOTORAD, BECK/ARNLEY and GATES. A representative part number is MOTORAD 200195.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 1.6L L4 | 0390004 | 🇺🇸 US | Twin CAMThermostat Seal | View on Amazon |
| VICTOR REINZ Fits: all 1959 Mga engines | 711352300 | 🇺🇸 US | Fiberwith 3 Bolt Holes | View on Amazon |
This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
2 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1959 MG Mga, from BECK/ARNLEY and VICTOR REINZ. 1 part fits every engine; the other 1 is engine-specific.
Part numbers include BECK/ARNLEY 0390004 and VICTOR REINZ 711352300.
Buying Cooling System Parts for a 1959 MG Mga
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system 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 the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Thermostat and Coolant / Antifreeze .
Frequently Asked Questions
How many cooling system parts fit the 1959 MG Mga?
Our catalog currently lists 44 cooling system parts for the 1959 MG Mga across 5 subcategories and 10 brands, covering both the 1.5L L4 and the 1.6L L4. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1959 MG Mga engines?
Some do. 38 parts fit every engine; the other 6 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 cooling system problems on a 1959 MG Mga?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. 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, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
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 1959 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 1959 MG Mga?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1959 MG Mga
Cooling System Parts for Other MG Mga Years
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