Apr 8, 2026Transmission & drivetrainElectrical systemEngine
The Power Electronics Control Unit (ECM), Part No. A453-900-72-11, and the DC-to-DC converter have both failed, rendering this all-electric vehicle completely inoperable. There is no backup propulsion system. The DC-to-DC converter powers safety-critical systems including lighting, turn signals, and hazard flashers — its failure could cause loss of safety-critical functions while driving. Total repair estimate is $20,560.43. The manufacturer Mercedes-Benz USA denied warranty coverage using a Canadian warranty document for the wrong vehicle model. MBUSA has shut down the Smart warranty portal at the dealer level and their website returns no warranty data for Smart vehicles despite active warranty obligations. Smart exited the US market and MBUSA appears to have abandoned warranty support while warranties remain active.
NHTSA ODI 11730040
Jul 28, 2023Electrical system
The car won't charge over 20% due probably a faulty manufacturer part of N83 high voltage control box. This could cause very serious electrical/battery issues if the high voltage box is faulty.
NHTSA ODI 11535062
Sep 6, 2018Electrical systemLightsVisibility & wipers
TL* THE CONTACT OWNS A 2017 SMART FOR TWO. WHILE THE VEHICLE WAS IN REVERSE, THE CONTACT HEARD AN ABNORMAL NOISE COMING FROM THE REAR OF THE VEHICLE. THE REAR EXTERIOR LIGHTING AND REAR WIPER WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO GARAGE ISLA VERDE LLC (LOCATED AT AVE, BALDORIOTY DE CASTRO KM 10.3, PR 00979, (787) 620-1313), BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 2,334. **TR CONSUMER COMMENT IN SPANISH. UPDATED 10/30/18*JB
NHTSA ODI 11127959
Feb 13, 2018Electrical system
TL* THE CONTACT OWNS A 2017 SMART FORTWO. THE CONTACT STATED THAT THE VEHICLE DID NOT FULLY CHARGE TO THE MANUFACTURER RECOMMENDED MILEAGE RANGE. IN ADDITION, IN COLD WEATHER CONDITIONS, THE MILEAGE OF THE VEHICLE DROPPED APPROXIMATELY 10 MPH ON THE INSTRUMENT PANEL. MERCEDES-BENZ OF BOSTON (259 MCGRATH HWY, SOMERVILLE, MA) AND THE MANUFACTURER WERE CONTACTED IN REGARDS TO DIAGNOSTIC TESTING. THE TECHNICIAN INFORMED THE CONTACT THAT THE VEHICLE OPERATED AS INTENDED. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000.
NHTSA ODI 11072673