This page lists 27 cooling system parts for the 2020 BMW 420I, across 7 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2020 BMW 420I, 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. Most of the listed parts are Coolant / Antifreeze (12 parts), Thermostat / Thermostat Housing / Water Outlet Seal (5 parts) and Coolant Hose / Pipe Seal (3 parts). The other 4 part types cover the remaining 7 parts.
The 2020 BMW 420I came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
10 brands supply cooling system parts for the 2020 BMW 420I, led by ELRING (9 parts), PRESTONE (5 parts) and PEAK (4 parts), plus 7 more brands. Quality grades include Premium, Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 BMW 420I. 4 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and ELRING 474310 (Thermostat / Thermostat Housing / Water Outlet Seal). 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 | AF3055 | 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇲🇽 MX | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇲🇽 MX | Blue Mountain Long LifeAll Vehicle | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇲🇽 MX | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇲🇽 MX | 1 GallonGlobal Lifetime | View on Amazon |
| PRESTONE | AF6110 | 🇲🇽 MX | MAX Original EquipmentEuropean Blue | View on Amazon |
| PRESTONE | AFMAX | 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN | ACE008 | 🇲🇽 MX | BlueHOAT | View on Amazon |
| PEAK | PEB1GAL | 🇲🇽 MX | OET European Extended Life Blue1 Gallon | View on Amazon |
| VALVOLINE | 859537 | 🇲🇽 MX | G48 Blue1 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.
12 Coolant / Antifreeze parts are listed for the 2020 BMW 420I, from PRESTONE, PEAK, FVP and 2 other brands. FVP MV5050GAL carries the "Popular" badge.
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 and PEAK supply 3 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.
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 3 options from AISIN, PEAK and VALVOLINE — built to original-equipment specification. AISIN ACE008 is listed in this group.
Coolant Hose / Pipe Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 283410 | 🇲🇽 MX | Material: FPM (Fluoride Rubber) | View on Amazon |
| ELRING | 521520 | 🇲🇽 MX | Engine Sided420i Gran Coupe | View on Amazon |
| ELRING | 249690 | 🇲🇽 MX | 420i Gran CoupeExecutive | View on Amazon |
This table covers the seals at the Coolant Hose / Pipe. 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.
3 Coolant Hose / Pipe Seal parts for the 2020 BMW 420I come from ELRING.
This group includes ELRING 283410, ELRING 521520 and ELRING 249690.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 60816 | 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| NISSENS | 60817 | 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| NISSENS | 60815 | 🇲🇽 MX | Brazed cooling fins | View on Amazon |
This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap.
NISSENS supplies the 3 Radiator parts for the 2020 BMW 420I.
This group includes NISSENS 60816, NISSENS 60817 and NISSENS 60815.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI | SGA113 | 🇲🇽 MX | 420i Gran Coupe | View on Amazon |
| VEMO | V20720173 | 🇲🇽 MX | View on Amazon |
This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender.
2 Temperature Sender / Sensor parts are listed for the 2020 BMW 420I, from MARELLI and VEMO.
Part numbers include MARELLI SGA113 and VEMO V20720173.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | 1225221 | 🇲🇽 MX | Includes Housing, Sensor, Seal | 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.
This group shows a single part: MOTORAD 1225221.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Popular | 474310 | 🇲🇽 MX | for OE Number: 11-51 8 516 207Material: HNBR (hydrogenated nitrile butadiene rubber) | View on Amazon |
| ELRING | 916480 | 🇲🇽 MX | 420i Gran CoupeExecutive | View on Amazon |
| ELRING | 648240 | 🇲🇽 MX | 420i Gran CoupeExecutive | View on Amazon |
| ELRING | B22090 | 🇲🇽 MX | 420i Gran CoupeExecutive | View on Amazon |
| ELRING | B22100 | 🇲🇽 MX | 420i Gran CoupeExecutive | 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.
ELRING supplies the 5 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2020 BMW 420I. ELRING 474310 carries the "Popular" badge.
Part numbers include ELRING 474310, ELRING 916480 and ELRING 648240, among others listed above.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | B07530 | 🇲🇽 MX | 420i Gran CoupeExecutive | View on Amazon |
This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 2020 BMW 420I — ELRING B07530.
Buying Cooling System Parts for a 2020 BMW 420I
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.
- Confirm you have the 2.0L L4 Turbocharged 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, 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: Coolant / Antifreeze and Thermostat / Thermostat Housing / Water Outlet Seal .
Frequently Asked Questions
How many cooling system parts fit the 2020 BMW 420I?
Our catalog currently lists 27 cooling system parts for the 2020 BMW 420I across 7 subcategories and 10 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2020 BMW 420I?
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 2020 BMW 420I 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 2020 BMW 420I?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. 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 2020 BMW 420I
Cooling System Parts for Other BMW 420I 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.