OEM-spec transmission fluid
manufacturer-specified fluid fluid search for BMW M550i xDrive.
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BMW M550i xDrive Transmission Fluid
Factory manual transmission fluid type & capacity for the BMW M550i xDrive. Exact capacities and specs extracted from the LEMON service manual archive.
Last updated: 2026-05-12 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
2018-2023 BMW M550i xDrive ATF: 9.20 QTS. (8.7 L) — Automatic Transmission Fluid 3 and Automatic Transmission 3+ can be mixed with each other. Note: 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..
| Generation | Years | Top spec |
|---|---|---|
| 2018-2023 | 2018-2023 | 9.20 QTS. (8.7 L) — Automatic Transmission Fluid 3 and Automatic Transmission 3+ can be mixed with each other. Note: 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. |
Factory Manual Verification
Cross-check these specs against the official BMW M550i xDrive maintenance schedule.
Factory Manual ConfirmationTransmission Fluid
Know the exact transmission fluid job for your BMW M550i xDrive
2018-2023 BMW M550i xDrive ATF: 9.20 QTS. (8.7 L) — Automatic Transmission Fluid 3 and Automatic Transmission 3+ can be mixed with each other. Note: 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..
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
Use the archive navigator when you need the exact engine, trim, or production-branch manual instead of a broad year-range summary. That keeps the buying list and repair steps aligned with the real vehicle.
Open the manual links above to confirm the exact engine and trim branch before ordering parts.
2018-2023
2018-2023Automatic Transmission Fluid9.20 QTS. (8.7 L) — Automatic Transmission Fluid 3 and Automatic Transmission 3+ can be mixed with each other. Note: 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.
Notes
- →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.
Ready to BuyFitment-first picks for BMW M550i xDrive
Buy the Exact Parts and Tools for This Job
These links are built from the same specs shown on this page so users can move from lookup to purchase faster. Confirm exact engine and trim if your vehicle has multiple variants, then build the full cart before you step away from the computer.
Affiliate disclosure: We may earn a commission at no extra cost to you. The goal is to get you to the right parts in one pass.
Spec Snapshot
- Automatic Transmission Fluid
- 9.20 QTS. (8.7 L) — Automatic Transmission Fluid 3 and Automatic Transmission 3+ can be mixed with each other. Note: 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.
Fluid transfer pump
Helpful for sealed transmissions with bottom-fill service.
Prevents under-fill and spill-heavy refills.
Check Price and FitmentPan gasket and filter kit
Complete service kit where pan filters are replaceable.
A proper service kit helps avoid repeat labor.
Check Price and FitmentFluid transfer pump
Helpful for sealed transmissions and bottom-fill service.
A pump keeps refill clean and reduces the chance of under-fill.
Check Price and FitmentShop towels and pan gasket supplies
Keep the service area clean and the pan sealed.
Transmission service is easier when cleanup gear is already on hand.
Check Price and FitmentBefore you buy, sanity-check the repair quote and the cart
If your shop quote looks high, run it through Quote Shield to catch overpricing before checkout. Then use the parts links above to lock in the one-trip plan.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
⚙️Shop →
Transmission Fluid
Must match the specific ATF or CVT spec for your car.
⚓Shop →
Fluid Transfer Pump
Crucial for filling "sealed" transmissions from below.
🕸️Shop →
Transmission Filter
Recommended when performing a full pan service.
🪙Shop →
Drain Plug Washer
Prevents seepage after a drain-and-fill service.
🧻Shop →
Shop Towels
Cleanup gear for ATF spills and pan work.
🧰View All →
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your BMW M550i xDrive so the job is ready when the parts arrive.
Frequently Asked Questions
- Where is this data from?
- Extracted directly from the LEMON factory service manual archive. Sources are cited per generation.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-12