The 2018 BMW 520I has 22 cooling system parts with verified fitment on this page — 5 part types and 10 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2018 BMW 520I, 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 (14 parts), Coolant Air Bleeder (4 parts) and Coolant Reservoir (2 parts). The other 2 part types cover the remaining 2 parts.
The 2018 BMW 520I 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 2018 BMW 520I, led by PRESTONE (5 parts), PEAK (4 parts) and VALVOLINE (3 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 2018 BMW 520I. 3 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and PRESTONE AF3100 (Coolant / Antifreeze). 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 |
| VALVOLINE | 719009 | 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | 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 |
| 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.
14 Coolant / Antifreeze parts are listed for the 2018 BMW 520I, from PRESTONE, PEAK, VALVOLINE 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, PEAK and 1 other brand supply 4 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 4 options from VALVOLINE, AISIN and PEAK — built to original-equipment specification. AISIN ACE008 is listed in this group.
Coolant Air Bleeder
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 902404 | 🇲🇽 MX | Plastic | View on Amazon |
| DORMAN | 902404HP | 🇲🇽 MX | OE FIX | View on Amazon |
| SKP | SK902404 | 🇲🇽 MX | Plastic | View on Amazon |
| SKP | SK902404HP | 🇲🇽 MX | BRASS | View on Amazon |
This table covers the bleeders used to purge air from the coolant circuit.
4 Coolant Air Bleeder parts for the 2018 BMW 520I come from 2 brands — DORMAN and SKP.
Part numbers include DORMAN 902404, DORMAN 902404HP and SKP SK902404, among others listed above.
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.
This group shows a single part: ELRING 283410.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 603880 | 🇲🇽 MX | View on Amazon | |
| GPD | 2411208 | 🇲🇽 MX | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
2 Coolant Reservoir parts for the 2018 BMW 520I come from 2 brands — DORMAN and GPD.
Listed part numbers: DORMAN 603880 and GPD 2411208.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| 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.
One part is listed for the 2018 BMW 520I — VEMO V20720173.
Buying Cooling System Parts for a 2018 BMW 520I
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 Coolant Air Bleeder .
Frequently Asked Questions
How many cooling system parts fit the 2018 BMW 520I?
Our catalog currently lists 22 cooling system parts for the 2018 BMW 520I across 5 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 2018 BMW 520I?
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 2018 BMW 520I 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 2018 BMW 520I?
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 2018 BMW 520I
Cooling System Parts for Other BMW 520I Years
Switch vehicle or jump to a subcategory
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.