The Smart 453 EQ encountered a significant charging issue, with the manufacturer in Germany quoting €8,000 for repairs, despite the actual cost of the faulty component being just €2. The issue stemmed from an inability to charge via Type 2. OEMs often opt to replace entire powertrain units rather than diagnosing and repairing individual components, but at EV Clinic, we specialize in in-depth diagnostics and component-level repairs.
In some cases, design choices prioritize aesthetics over serviceability, leading to complex and costly repairs for owners. In this instance, the fault appeared to be related to the onboard charger (OBC). However, after thoroughly inspecting the powertrain and finding no faults, we discovered a hidden fuse within the charge port cable. If this fuse fails, there is no redundant failsafe system to detect or report it. Despite this, an authorized service center had proposed replacing the entire powertrain for approximately €8,000, when the actual solution was simply replacing a €2 fuse in the charge port cable—an evident diagnostic oversight.
Additionally, it appears that multiple different failures, such as those involving the DC-DC converter, OBC, and inverter, are often addressed through full powertrain replacements, each reportedly costing around €8,000. This raises concerns about cost-effective repair strategies. In contrast, we find the older Smart 451 ED to be of notably higher quality and more serviceable, offering a more sustainable long-term ownership experience.
Part number: 4539019900, 4539029007
OEM Reparatur: 8000€
EVC Reparatur: Teile 2€ und Arbeit 798€.
Fehler: P07A023
