BMW M550i Fluid Capacities
Factory fluid capacity for the BMW M550i.
Last updated: 2026-10-28 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
2021-2023 BMW M550i: — PAG refrigerant oil (polyalkylene glycol).
| Generation | Years | Top spec |
|---|---|---|
| 2021-2023 | 2021-2023 | — PAG refrigerant oil (polyalkylene glycol) |
| 2020 | 2020 | — PAG refrigerant oil (polyalkylene glycol) |
| 2018-2019 | 2018-2019 | — PAG refrigerant oil (polyalkylene glycol) |
This vehicle's factory manual
The spec is above. This opens the 2021 BMW M550i factory book. Use another year if yours is older.
BMW M550i maintenance schedule
Know the exact fluid capacities job for your BMW M550i
2021-2023 BMW M550i: — PAG refrigerant oil (polyalkylene glycol).
Fluid type and capacity can change by engine, drivetrain, and transmission. Verify the exact branch before filling anything. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
The button opens the factory book for this vehicle. Use the engine picker only when your trim is not the one this page already matched.
2021-2023
- →See Underhood Decal for oil capacity.
- →The nameplate in the engine compartment indicates which refrigerant has been used.
- →The automatic transmissions have a extended oil filling. These transmissions require no oil change for their entire service life. The approved lifetime fluid must be used after repairs on the transmission or transmission oil cooler. The lifetime oil must not be mixed with or replaced by other types of automatic transmission fluid as this will cause transmission failure.
- →The oil reservoirs for hydraulic fluid are marked on the rim of the reservoir to show which type of oil grade can be used. ATF oil or Pentosin CHF oil.
2020
- →See Underhood Decal for oil capacity.
- →The nameplate in the engine compartment indicates which refrigerant has been used.
- →The automatic transmissions have a extended oil filling. These transmissions require no oil change for their entire service life. The approved lifetime fluid must be used after repairs on the transmission or transmission oil cooler. The lifetime oil must not be mixed with or replaced by other types of automatic transmission fluid as this will cause transmission failure.
- →The oil reservoirs for hydraulic fluid are marked on the rim of the reservoir to show which type of oil grade can be used. ATF oil or Pentosin CHF oil.
- →Fill with water and - if required - with a washer antifreeze (according to manufacturer's recommendations). Mix the washer fluid before adding it to the reservoir.
2018-2019
- →See Underhood Decal for oil capacity.
- →The nameplate in the engine compartment indicates which refrigerant has been used.
- →The automatic transmissions have a extended oil filling. These transmissions require no oil change for their entire service life. The approved lifetime fluid must be used after repairs on the transmission or transmission oil cooler. The lifetime oil must not be mixed with or replaced by other types of automatic transmission fluid as this will cause transmission failure.
- →The oil reservoirs for hydraulic fluid are marked on the rim of the reservoir to show which type of oil grade can be used. ATF oil or Pentosin CHF oil.
Manual already checked Amazon for you
You came here for the exact spec. Now here is the exact part — plus the two things people always forget and have to run back to the store for.
BMW M550i Fluid Service Kit
Buy all the fluids your BMW M550i needs in one cart.
We earn a small commission if you buy through these links — at zero extra cost to you. We only suggest items that match the factory specs on this page.
Fluids — Manual's Parts List
Everything for a full fluid service weekend.
- 1Engine OilShop →
Match viscosity to your spec
- 2CoolantShop →
Match color/chemistry — never mix types
- 3Long-Neck FunnelShop →
Transmission and differential fill holes are recessed
- 4Fluid Extraction PumpShop →
Remove old brake fluid from reservoir without mess
- 5Shop RagsShop →
You will need more than you think
Get everything at once
One search shows all of the above on a single page.
Links go to Amazon via our affiliate store (aiautorepair-20). We earn a small commission at no extra cost to you — it keeps the site running and the data free.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Fluid Extraction Pump
Cleanly remove old fluids from reservoirs.
Clean Shop Rags
Lint-free rags for cleaning dipsticks and spills.
Multi-Purpose Funnel
Long-neck funnel for hard-to-reach fill points.
Nitrile Gloves
Keep hands clean during multi-fluid maintenance.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your BMW M550i so the job is ready when the parts arrive.
Frequently Asked Questions
- What fluid capacities does a BMW M550i use?
- 2021-2023 BMW M550i: — PAG refrigerant oil (polyalkylene glycol).
- Why do fluid capacities vary by generation for the BMW M550i?
- Different engine options, transmission types, and cooling system designs across model years change total fluid volumes. Always use the capacity listed for your exact year and engine code — do not guess across generations.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-28