The Lemon Index
BMW's 4.4 L twin-turbo plug-in hybrid 90° V8 in the XM and M5 (G90), model years 2023–2026. YouTube likes the 2023 best.
A safer bet: YouTube owner tone 55/100, #28 of 165 engines with a YouTube study (in the top third); 1 engine-related recall on record.
Everyday cars with this engine Tap a year for that car's full report.
- BMW 5 Series BMW M5 (G90)2025
Model years from EPA version lists. Only years we have a car page for.
Reliability by year
Not enough complaints to chart. Owners filed 12 complaints with the government that we can tie to this engine's cars, 2023–2026, about any part of the car. Performance versions are mostly filed under their base model (a Shelby GT500 is filed as a Mustang), so we only count complaints whose model name or the owner's own words tie them to this engine, and lead with YouTube, recalls and the automaker's repair notes.
YouTube videos are most positive about the 2023 (56) and least about the 2024 (53); neighboring years share many of the same videos, so small gaps mean little.
How we count: owner complaints only where the car's name and year leave no doubt; YouTube tone from videos that name this engine or its cars. How we count
Owner complaints (NHTSA) are filed by model and year, not engine. We count one for this engine only when the model name and year had no other engine (e.g. "488 GTB", "GT-R"), or when the owner's own words name a version that had only this engine that year (Z06, ZR1, Hellcat, GT500 ...). They cover the whole car (wheels, air bags, electrics ...), not only the engine, and none of them is a failure rate. We chart them only for engines with 30 or more, over 3 or more years. YouTube tone = how positive the videos are, 0–100, from titles and transcripts (praise vs trouble words, the title counts 3 times), weighted by views; a year needs at least 3 videos' worth. A video counts for this engine when its title names the engine or a car that only had this engine in the years it names; a video whose title names no model year counts toward every year of that car, so neighboring years share most of their videos.
All the numbers, year by year
| Year | Cars | Owner complaints | YouTube says | Recalls |
|---|---|---|---|---|
| 2023 | XM | 2 | 56 (94 videos) | 6 |
| 2024 | XM | 7 | 53 (88 videos) | 6 |
| 2025 | XM, M5 (G90) | 3 | 55 (120 videos) | 0 |
| 2026 | M5 (G90), XM | 0 | 56 (114 videos) | 0 |
Recalls on cars with this engine 9
1 of them is about the engine, fuel, cooling or powertrain. They come first.
23V294000 Engine And Engine Cooling · BMW XM 2023
The fasteners that connect the exhaust system and the catalytic converter may not have been tightened correctly.
26V422000 Service Brakes, Hydraulic · BMW XM 2023–24
The integrated brake (IB) system may malfunction and result in a loss of.
24V104000 Electronic Stability Control (Esc) · BMW XM 2023–24
Please see the recall report for a complete list of models and model years.
24V139000 Structure · BMW XM 2024
The tailgate panel may detach from the mounting structure due to improper adhesive bonding that occurred during manufacturing.
24V345000 Seat Belts · BMW XM 2024
The seat belt system may inaccurately detect that passengers are belted, preventing the seat b.
Show all 9
24V697000 Electronic Stability Control (Esc) · BMW XM 2024
24V739000 Electronic Stability Control (Esc) · BMW XM 2023–24
Please see the recall report for a complete list of models and model years.
23V471000 Air Bags · BMW XM 2023
The knee air bag (driver and/or passenger) may not have been manufactured correctly, which.
23V622000 Air Bags · BMW XM 2023
The front passenger knee air bag may not deploy as intended.
NHTSA recalls by model and year. A recall counts here when every confirmed version of that model-year had this engine, or the recall names it. Check a car's VIN for its own open recalls.
Engine problems BMW told dealers about
BMW sent dealers 27 repair notes about the engine on these cars, including:
- Malfunction indicator lamp (MIL) is triggered by the erroneous fault code(s) BA0023 - Control unit:…
- Several complaints are possible: Vehicle does not start Gear cannot be engaged Various Check Control Messages…
- Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases…
NHTSA manufacturer communications (technical service bulletins), matched by model name and year like the complaints, engine-related ones only. A repair note is not a recall: ask a seller whether it was done.
Every US version with this engine
| Car and versions | Years |
|---|---|
| BMW XM XM, XM Label | 2023–26 |
| BMW M5 (G90) M5 Sedan, M5 Touring · BMW 5 Series, every year | 2025–26 |
Engine code: S68. Power: 577 hp, factory figures (engine only; the M5 makes 717 hp and the XM Label 738 hp with the motor). Versions and years: EPA (fueleconomy.gov). Sources: BMW S68 · The all-new 2025 BMW M5 (BMW Group).
Quick answers
What cars have the BMW S68 4.4 twin-turbo V8 engine?
In the US: the BMW XM, BMW M5 (G90), model years 2023–2026. See the version table for each one.
Is the BMW S68 4.4 twin-turbo V8 reliable?
Mostly yes. YouTube owner tone 55/100, #28 of 165 engines with a YouTube study (in the top third); 1 engine-related recall on record. Not enough owner complaints to judge it per car: the government files most performance versions under their base model. Its cars had 9 recalls (1 about the engine, fuel or powertrain). Have any used car inspected.
How much horsepower does the BMW S68 4.4 twin-turbo V8 make?
577 hp in factory figures, depending on the car (engine only; the M5 makes 717 hp and the XM Label 738 hp with the motor).