The 2021 BMW 118I has 15 cooling system parts with verified fitment on this page — 4 part types and 7 brands, covering the 1.5L L3 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 BMW 118I, 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. 14 parts of the 15 listed are Coolant / Antifreeze (11 parts), Radiator (2 parts) and Coolant Hose / Pipe (1 part). The other 1 part type covers the remaining 1 part.
Every part on this page is matched to the 1.5L L3 Turbocharged — the only engine offered in the 2021 BMW 118I.
The most listed brands for 2021 BMW 118I cooling system parts are PRESTONE (4 parts), PEAK (4 parts) and VALVOLINE (2 parts), plus 4 more brands. Quality grades include Premium, Standard Replacement and Economy.
3 parts on this 2021 BMW 118I page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PRESTONE AF3100 (Coolant / Antifreeze) and PRESTONE AF2100 (Coolant / Antifreeze). Click any part number to see 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 |
|---|---|---|---|---|
| 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 | AFMAX | 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | 859537 | 🇲🇽 MX | G48 Blue1 Gallon | View on Amazon |
| AISIN | ACE008 | 🇲🇽 MX | BlueHOAT | View on Amazon |
| PEAK | PEB1GAL | 🇲🇽 MX | OET European Extended Life Blue1 Gallon | View on Amazon |
| VALVOLINE | 861399 | 🇲🇽 MX | G40 Pink1 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.
11 Coolant / Antifreeze parts for the 2021 BMW 118I come from 4 brands — PRESTONE, PEAK, VALVOLINE and 1 other brand. The "Popular" part is PRESTONE AF3100.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 2 options from PRESTONE and PEAK — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, VALVOLINE, AISIN and PEAK supply 4 parts: built to original-equipment specification. A representative part number is VALVOLINE 859537.
Coolant Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 9365502 | 🇲🇽 MX | Pipe | View on Amazon |
This table covers the hard pipes and extra hoses in the coolant circuit.
This group shows a single part: DORMAN 9365502.
Coolant Hose / Pipe Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 283410 | 🇲🇽 MX | Material: FPM (Fluoride Rubber) | 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.
One part is listed for the 2021 BMW 118I — ELRING 283410.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 606812 | 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| NISSENS | 60862 | 🇲🇽 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.
2 Radiator parts for the 2021 BMW 118I come from NISSENS.
Part numbers include NISSENS 606812 and NISSENS 60862.
Buying Cooling System Parts for a 2021 BMW 118I
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 1.5L L3 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 Radiator .
Frequently Asked Questions
How many cooling system parts fit the 2021 BMW 118I?
Our catalog currently lists 15 cooling system parts for the 2021 BMW 118I across 4 subcategories and 7 brands, covering the 1.5L L3 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2021 BMW 118I?
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 2021 BMW 118I 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 2021 BMW 118I?
Every part on this page is matched to the 1.5L L3 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 2021 BMW 118I
Cooling System Parts for Other BMW 118I 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.