🇩🇪 Deutsch
Smart · Mid-Size SUV · 2025–2026

Smart #5 HX51

Weaknesses, engine ratings and buying advice

★★★★★
3.0 / 5.0 · Based on 1 engine variants

Engine Overview

The Smart #5 HX51 is available with 2 engine variants — from 340 to 646 hp. 1 variants had engine changes — the model year is crucial.

Brabus · Elektro· 646 PS
2025 2026
Be Careful 0 weaknesses
Show all weaknesses →
Elektromotor · Elektro· 340–363 PS Engine Change
2025 2026
Be Careful 0 weaknesses
Show all weaknesses →
2025 2026
Be Careful 0 weaknesses
Show all weaknesses →

The Smart Brabus (Elektro, 646 PS) has the SEA-250 (Elektromotor) — rated: "Be Careful".

The Smart Elektromotor (Elektro, 340–363 PS) comes with 2 different engines: SEA-250 (2025–2026, Be Careful) und SEA-250 (2025–2026, Be Careful). Pay attention to the model year for the Elektromotor!

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: "Fun to Drive!". {description} 340 hp in the largest Smart ever made — a paradigm shift. Family-friendly electric SUV with up to 740 km range.
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