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Smart · Mid-Size SUV · 2025–2026 Custom Search

Smart #5 HX51

Weaknesses, engine ratings and buying advice

★★★★★
3.0 / 5.0 · Based on 1 engine variants · How we rate

Engine Overview

The Smart #5 HX51 is available with 2 engine variants — from 340 to 646 hp.

Brabus · Electric· 646 PS
2025 2026

Geely platform for the Smart #5. Larger SUV with up to 100 kWh battery.

No known weaknesses documented.

Elektromotor · Electric· 340–363 PS
2025 2026

Geely platform for the Smart #5. Larger SUV with up to 100 kWh battery.

No known weaknesses documented.

Vehicle Weaknesses

WeaknessCost
!Navigation Stops Working After First Route

Several test drivers report that navigation fails after the first calculated route and then only shows previously visited charging stations. OTA update OS 2.1.0 (Feb. 2026) is expected to bring improvements.

Symptoms: Navigation shows 'offline', route guidance stops after the first destination
 Low
●Driver Assistance Settings Reset After Restart

As with the #1 and #3, warning sounds and ADAS settings must be deactivated again after every restart. Pre-conditioning does not stop automatically.

Symptoms: Warning beeps active after every start, app-controlled pre-conditioning does not stop automatically
 Low
Known Problems and Issues +

A total of 3 weaknesses have been documented for the Smart #5 HX51 (2025–2026). Typical issues affect Electronics, Suspension.

What to watch out for with the Smart #5? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Smart #5 HX51 have? +
No known weaknesses have been documented for the Smart #5 HX51.
What should I look for when buying a used Smart #5 HX51? +
faq.watch_a_none
Which engine is recommended? +
Be careful: SEA-250 (Elektromotor). No engine is rated 'Good Choice'. The most fun to drive is the SEA-250 (Elektromotor).
Which Smart #5 HX51 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Smart #5 HX51 — rated: "Legendary!". {description} Nearly 600 hp in a Smart — sounds absurd, and it is. All-wheel drive, 100 kWh battery, under 4 seconds to 100. The Brabus madness.
Is the Smart #5 HX51 worth buying used? +
The Smart #5 HX51 requires careful consideration — choosing the right engine variant is crucial.
What horsepower variants are available for the Smart #5 HX51? +
The Smart #5 HX51 is available with engine variants from 340 to 646 hp.

Last updated: February 2026 · All information without guarantee