Kia
EV9
Owner report available
Mercedes-Benz
EQB
Owner report available
Kia EV9 vs Mercedes-Benz EQB
The short answer
Based on available data, the Kia EV9 comes out ahead of the Mercedes-Benz EQB 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
EV9
Overall
Mixed to positive sentiment overall, with a strong consensus that it is an excellent vehicle for its intended purpose. Owners frequently describe it as an "incredible car," praising its quiet and comfortable ride, smooth handling, powerful acceleration, and luxurious interior feel. It is widely regarded as a superior road trip vehicle due to its fast charging capability (200+ kW DCFC) and practical range.
Best version to buy
GT-Line trim is frequently mentioned and praised by owners. The Land trim is also highlighted for specific features like the digital rearview mirror (for safety against headlight glare) and massage seats.
Known issues
- ICCU (Integrated Charging Control Unit) failure: causes vehicle breakdowns and recurrent 12V battery drain. Replacement is covered under warranty but requires dealership service. Frequency: very frequent.
- Reduced winter range: real-world highway range can drop significantly in cold temperatures, with one report of approximately 265 km (165 miles) from a rated 435 km (270 miles) in extreme cold (-20°C / -4°F). Frequency: recurrent.
- Missing convenience features: lack of Homelink/garage door opener, laminated glass for sound insulation, and a dedicated "dog mode" or easy climate-keep function are noted as omissions compared to competitors like Tesla.
EQB
Overall
Mixed sentiment with a clear generational divide. The pre-facelift models (circa 2021-2023) are heavily criticized for serious reliability issues, including battery defects leading to failures, recalls for fire risk, and motor problems. These early models are also faulted for insufficient real-world range, dated infotainment software (MBUX NTG 6), and an interior quality perceived as entry-level with cheap plastics.
Best version to buy
EQB 250+ (post-facelift). This model is specifically recommended for maximizing range.
Known issues
- Battery defects and recalls: failures requiring replacement, recall for fire risk (2021-2024 model years), battery overheating warnings. Frequency: very frequent (in pre-facelift context).
- Insufficient real-world range: significantly below WLTP estimates, especially in winter and at highway speeds. Frequency: very frequent.
- Dated/buggy infotainment software (MBUX NTG 6): cannot be updated over-the-air like Tesla, screen not fully utilized for Apple CarPlay/Android Auto (wired only), system lag, camera errors displaying black screens. Frequency: recurrent.
The verdict
The Kia EV9 is the better choice for most buyers.
It has more power on its best-equipped version than the Mercedes-Benz EQB, based on the data above. If efficiency matters more to you than outright power, the Mercedes-Benz EQB is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Kia EV9 or the Mercedes-Benz EQB?
Owner reports show similar reliability sentiment for the Kia EV9 and the Mercedes-Benz EQB. Check the known issues listed above for specific differences between the two.
Which is better for families, the Kia EV9 or the Mercedes-Benz EQB?
The Kia EV9 seats more passengers than the Mercedes-Benz EQB on its catalogued best-equipped version. Body type also differs: the Kia EV9 is classed as a SUV, the Mercedes-Benz EQB as a SUV.
Which has better fuel economy, the Kia EV9 or the Mercedes-Benz EQB?
The EPA rates the 2026 Kia EV9 at 78–89 MPGe combined and the 2025 Mercedes-Benz EQB at 87–107 MPGe, depending on the version.
Which is cheaper to maintain, the Kia EV9 or the Mercedes-Benz EQB?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Mercedes-Benz EQB than the Kia EV9. See the known issues comparison above.