BMW
Z3
BMW
Z4
BMW Z3 vs BMW Z4: 2024 Comparison
The short answer
Based on available data, the BMW Z4 comes out ahead of the BMW Z3 on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
Z3
Overall
Sentiment is generally positive, with the Z3 appreciated as a fun, stylish, and engaging classic roadster that offers a distinct character compared to its primary rival, the Mazda Miata. Owners frequently cite its attractive design, the enjoyable driving experience of the inline-6 models, and its status as a more powerful and comfortable alternative to the Miata, especially for taller drivers. However, this is tempered by a very frequent and strong consensus regarding the high and ongoing costs of maintenance and repair, which are described as a significant burden.
Best version to buy
Inline-6 cylinder models (e.g., 2.8L) are strongly preferred over the four-cylinder 1.9L for their superior power, torque, and engine sound. The M Coupe ("Clownshoe") is highlighted by enthusiasts for its unique design and performance, with notes that coupe variants often survive in better condition than convertibles due to less sun damage.
Known issues
- ⚠High maintenance and repair costs: very frequent and emphasized as the defining characteristic of ownership. Includes expensive parts, labor, and the constant need for age-related repairs. Frequency: very frequent.
- ⚠Cooling system failures: a known weak point requiring proactive replacement (radiator, water pump, hoses). Frequency: very frequent.
- ⚠General age-related deterioration: cracking rubber hoses, bushings, interior trim crumbling (especially in sun-damaged convertibles), electrical gremlins. Frequency: very frequent.
Z4
Overall
Sentiment is highly dependent on the specific generation and powertrain. For the current generation (G29), the Z4 M40i variant receives extremely positive feedback from owners, described as "insanely good," "stupid fast," "incredible power," "balanced," and "the best car I've ever owned." It is praised for its fun factor, driving dynamics, and value proposition, particularly when equipped with a manual transmission. The base 30i variant is considered competent but less memorable, with some reviewers labeling it "forgettable." The previous E89 generation (2009-2016) is viewed more as a comfortable grand tourer or "Palm Beach cruiser," with criticism for feeling heavy and sluggish.
Best version to buy
For the current generation (G29), the Z4 M40i is overwhelmingly recommended as the definitive version. Owners emphasize that the high-output B58 engine transforms the experience, making it "exceptional" and a "real weapon," whereas the lower-powered 30i variant does not leave the same impression.
Known issues
- ⚠**E85/E86 & E89 Generations:** Cooling system failures (water pumps, expansion tanks): common point of failure. Frequency: recurrent. Oil leaks (valve cover gaskets, oil filter housing): common with age. Frequency: recurrent.
- ⚠**G29 Generation:** Factory brake fluid inadequacy: noted as unsuitable for the car's performance level. Frequency: isolated. "Ass-backward" tachometer design: criticized layout. Frequency: isolated.
The verdict
The BMW Z4 is the better choice for most buyers.
It has more power on its best-equipped version than the BMW Z3, based on the data above. If efficiency matters more to you than outright power, the BMW Z3 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the BMW Z3 or the BMW Z4?
Owner reports show similar reliability sentiment for the BMW Z3 and the BMW Z4. Check the known issues listed above for specific differences between the two.
Which is better for families, the BMW Z3 or the BMW Z4?
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
Which has better fuel economy, the BMW Z3 or the BMW Z4?
Fuel consumption data is limited for one or both models. Check the specs table above for the figures available on each catalogued version.
Which is cheaper to maintain, the BMW Z3 or the BMW Z4?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the BMW Z3 than the BMW Z4. See the known issues comparison above.