The third-generation Z4, known as the G29, launched for the 2019 model year and was developed alongside the A90 Toyota GR Supra. The partnership resulted in a shared chassis and powertrains, though each car has unique tuning and bodywork. For the Z4, this generation marked a return to a fabric soft-top, a departure from the previous E89's folding hardtop, saving weight and lowering the center of gravity. The US market initially received the 255 hp sDrive30i with a 2.0-liter turbo 4-cylinder and the 382 hp M40i with a 3.0-liter turbo inline-6.
Enthusiasts gravitate toward the M40i for its excellent B58 inline-6 engine, which delivers smooth, potent performance and shares its core with the Supra. It's a true modern sports car with a classic front-engine, rear-drive roadster layout. As a relatively new model, it isn't a vintage collectible yet, but its performance credentials and link to the legendary Supra nameplate give it long-term appeal. The 2025 introduction of a manual transmission option for the M40i may also increase interest in the model line as a whole.
The G29 is still in its depreciation phase, with an average sale price around $36,000 reflecting the market's current supply of off-lease sDrive30i models. These cars represent a strong value for a modern German roadster. Well-optioned, low-mileage M40i examples command the highest prices, holding their value much better and pointing towards their future as a desirable driver's car.
Buying Tips
- The B58 inline-6 in the M40i is the enthusiast's choice for its power and character. The B48 4-cylinder in the sDrive30i is adequate but offers a very different experience.
- Operate the soft-top multiple times to check for smooth, quiet operation. Inspect the fabric for tears, premature wear, and proper sealing against the windows.
- Test all features of the iDrive infotainment system and digital instrument cluster. Electrical issues can be difficult and costly to sort out.
- Review the vehicle's service history. Consistent oil changes and maintenance records are critical for the health of these turbocharged engines.
- Check the large alloy wheels for curb rash, bends, or cracks, as low-profile tires make them susceptible to damage. Uneven tire wear can also indicate underlying alignment or suspension issues.
Prices for sold examples range from $24,000 for early base models to $62,000 for high-spec M40i variants.
449 BMW G29 Z4 Roadster vehicles have been tracked across auctions and listings on Hypercars, with 353 currently live. Sold prices range from $500 to $434,886.
Data sourced from Bring a Trailer, Cars & Bids, eBay Motors, PCarMarket, and Collecting Cars. Updated daily.
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