DecodedCars2023 BMW Z4
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2023 models.
- Class
- Two Seaters
- Body styles
- M40i 2dr Convertible, Sdrive30i 2dr Convertible
- Engines
- 2.0L 4-cyl turbo, 3.0L 6-cyl turbo
- Drivetrain
- Rear-Wheel Drive
- Fuel
- Premium Gasoline
- MPG (best)
- 28 combined · 25 city / 33 hwy
- Length
- 170.9 in
- Curb weight
- 3,296–3,464 lb
- NHTSA rating
- Not rated
- Recalls
- 2 campaigns
Pros & cons
What's good
- Excellent fuel economyUp to 28 MPG combined — 51% better than the average 2023 two seaters (18.6 MPG).
Watch out for
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 5 similar 2023 models — not a review. How we calculate this →
Overview
The 2023 BMW Z4 is a two seaters offered with 2 engines (2.0L 4-cyl turbo and 3.0L 6-cyl turbo) and rear-wheel drive.
It measures about 171 inches long and 73 inches wide on a 97-inch wheelbase, with a curb weight of roughly 3,464 lb (M40i 2dr Convertible).
EPA rates its most efficient version at 28 MPG combined (25 city / 33 highway), 51% better than the 2023 two seaters average of 18.6 MPG, for an estimated $2,950 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
It has 2 recall campaigns on file.
What changed for 2023
No changes to engines, powertrains, drivetrains, size, EPA ratings or NHTSA crash rating compared with the 2022 Z4 — a carry-over year in the data.
Compared with 2022; trim, feature and price changes aren't covered. See the 2022 Z4 →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| M40i 2dr Convertible | 170.9 in | 73.2 in | 51.6 in | 97.2 in | 63.8 / 63.4 in | 3,464 lb | 51/49 |
| Sdrive30i 2dr Convertible | 170.9 in | 73.2 in | 51.6 in | 97.2 in | 63.8 / 63.4 in | 3,296 lb | 50/50 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| Z4 sDrive30i | 2.0L 4-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 25 / 33 / 28 | +51% | $2,950 | 312 |
| Z4 M40i | 3.0L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 23 / 31 / 26 | +40% | $3,150 | 338 |
EPA estimates; "vs. class" is combined MPG against the 2023 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2023 BMW Z4.
Similar 2023 two seaterss
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2023 BMW Z4 (this car) | 28 MPG | Not rated | 2 |
| 2023 Porsche 911 | 21 MPG | Not rated | 8 |
| 2023 Audi TT | 25 MPG | Not rated | 1 |
| 2023 Mercedes-Benz SL-Class | 23 MPG | Not rated | 0 |
| 2023 Jaguar F-Type | 19 MPG | Not rated | 0 |
| 2023 Porsche 718 | 24 MPG | Not rated | 1 |
Recalls (2)
Power Train › Automatic Transmission › Control Module (Tcm/Pcm/Tecm) · Dec 6, 2023
NHTSA campaign 23V821000 · 552 vehicles
- Problem
- BMW of North America, LLC (BMW) is recalling certain 2023 Toyota GR Supra, 3 Series Sedan (330i xDrive, M340i xDrive, M3), 5 Series Sedan (530i, 530i xDrive, M5), 4 Series Gran Coupe (430i, 430i xDrive), 4 Series Coupe (430i, 430i xDrive, M440i xDrive), 4 Series Convertible (430i, 430i xDrive, M440i xDrive), 8 Series Coupe (840i, M850i xDrive, M8), 8 Series Convertible (840i, M850i xDrive, M8), 8 Series Gran Coupe (850i xDrive, M8), X3 SAV (X3 xDrive30i, X3M), X4 SAV (X4 xDrive30i), X5 SAV (X5 xDrive40i, X5 M50i, X5M), X6 SAV (X6 xDrive40i, X6 M50i, X6M), and Z4 sDrive30i, Z4 M40i vehicles. The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.
- Risk
- Transmission oil that leaks into the control unit can lead to a seizure of the transmission gears, causing a sudden loss of drive power and increasing the risk of a crash.
- Fix
- Dealers will replace the transmission mechatronics module and the automatic transmission fluid, as necessary, free of charge. Owner notification letters were mailed January 26, 2024. Owners may contact BMW customer service at 1-800-525-7417.
Electrical System › Software · Feb 17, 2023
NHTSA campaign 23V099000 · 3,193 vehicles
- Problem
- BMW of North Americal, LLC (BMW) is recalling certain 2023 8 Series Coupe (840i, 840i xDrive, M850i xDrive, M8), 8 Series Convertible (840i, 840i xDrive, M850i xDrive, M8), 8 Series Gran Coupe (840i, 840i xDrive, M850i xDrive, M8, Alpine B8 xDrive), 2 Series Coupe (230i, 230i xDrive, M240i xDrive, M2), and 2022-2023 Z4 sDrive30i, Z4 M40i vehicles. When the digital key is removed from the vehicle, the Electronic Control Unit (ECU) software may still allow the power windows and sunroof to be closed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 118, "Power-operated Window Systems."
- Risk
- Unintentionally closing the windows or sunroof without the key present can increase the risk of injury to occupants inside the vehicle.
- Fix
- Dealers will update the software for the Electronic Control Unit (ECU), free of charge. In addition, the digital key function via cellular service and Wi-Fi capability will be deactivated until the vehicle is updated with new software. Owner notification letters are expected to be mailed April 11, 2023. Owners may contact BMW customer service at 1-800-525-7417.
Not every 2023 BMW Z4 is affected — only a VIN check confirms your car.
Owner-reported problems
No owner complaints for the 2023 BMW Z4 in NHTSA's database since 2015.
Used 2023 BMW Z4 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 2 recalls this year — ask for proof of repairs.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2023 BMW Z4. Not a substitute for a professional inspection.
Other Z4 years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2026 Z4 | 28 | 170.9 in | Not rated | 0 | 0 |
| 2025 Z4 | 28 | 170.9 in | Not rated | 0 | 1 |
| 2024 Z4 | 28 | 170.9 in | Not rated | 0 | 1 |
| 2022 Z4 | 28 | 170.9 in | Not rated | 3 | 1 |
| 2021 Z4 | 28 | 170.9 in | Not rated | 5 | 1 |
| 2020 Z4 | 27 | 170.9 in | Not rated | 6 | 5 |
| 2019 Z4 | 28 | 170.9 in | Not rated | 6 | 5 |
| 2016 Z4 | 26 | 166.9 in | Not rated | 1 | 4 |
| 2015 Z4 | 26 | 166.9 in | Not rated | 1 | 5 |
| 2014 Z4 | 26 | 166.9 in | Not rated | 3 | 7 |
| 2013 Z4 | 26 | 166.9 in | Not rated | 3 | 7 |
| 2012 Z4 | 27 | 166.9 in | Not rated | 4 | 5 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or BMW. How we calculate this →