BMW
X4
Infiniti
QX55
BMW X4 vs Infiniti QX55: 2021 Comparison
The short answer
Based on available data, the BMW X4 comes out ahead of the Infiniti QX55 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
X4
Overall
Mixed sentiment with a clear divide based on model variant and owner priorities. The X4 M40i and full M models receive strong praise for their powerful and reliable B58/S58 engines, engaging sporty handling, and overall driving enjoyment, with some owners describing them as the best cars they've driven. The coupe-SUV styling is polarizing, appreciated by some for its sporty, attention-grabbing look but criticized by others as an awkward compromise that sacrifices utility.
Best version to buy
X4 M40i: This model is frequently highlighted as offering the best balance, delivering the powerful and well-regarded B58 inline-six engine for strong performance without the extreme cost and ride harshness of the full M models. It provides a significant power upgrade over the base xDrive30i, making it the recommended choice for owners seeking a fun daily driver.
Known issues
- ⚠High maintenance and repair costs out of warranty: very frequent. Poor ride quality with specific run-flat tires (e.g., Continental): recurrent. Reduced rear visibility and cargo space compared to traditional SUVs: recurrent.
QX55
Overall
Mixed to negative sentiment overall. The vehicle is acknowledged for its attractive, sporty coupe-SUV styling, which several owners find to be a standout feature. It is also noted for being comfortable for shorter drivers, offering good seat adjustment and a wide view.
Best version to buy
Insufficient owner data available. One owner mentions having an "Essential" trim with ProPilot upgrades and appreciating features like a head-up display, while a loaner "Sensory" trim was noted to have fewer toys.
Known issues
- ⚠VC-Turbo engine failure risk: Major recall for manufacturing defects in engine bearings (main, A-, C-, L-link) leading to engine damage, catastrophic failure, loss of motive power, and potential engine fire.
- ⚠CVT transmission reliability and performance: Transmission described as "notoriously disliked," with a high likelihood of failure around 50,000-100,000 miles, cited as a ~$6,000 USD repair.
- ⚠Dated and problematic infotainment/technology: Interior tech described as "extremely dated," "from 2008," and "woefully behind." Specific glitches reported include: entertainment system reboots, Bluetooth turning off by itself, and a slow,…
The verdict
The BMW X4 is the better choice for most buyers.
It has more power on its best-equipped version than the Infiniti QX55, based on the data above. If efficiency matters more to you than outright power, the Infiniti QX55 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the BMW X4 or the Infiniti QX55?
Owner reports show similar reliability sentiment for the BMW X4 and the Infiniti QX55. Check the known issues listed above for specific differences between the two.
Which is better for families, the BMW X4 or the Infiniti QX55?
Both seat a similar number of passengers based on our data. The BMW X4 is classed as a SAC, the Infiniti QX55 as a SUV, which affects cargo space and ride height for family use.
Which has better fuel economy, the BMW X4 or the Infiniti QX55?
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 X4 or the Infiniti QX55?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the BMW X4 than the Infiniti QX55. See the known issues comparison above.