Mazda Demio: Common Problems & Reliability Guide

Real, sourced data · last reviewed 2026-08-19

Reviewed by [ADD REAL NAME], [ADD REAL YEARS/BACKGROUND - e.g. "12 years independent workshop experience"] - our sourcing methodology

Body Control Module Circuit Faults (Bonnet Latch Switch & Current Sensor Communication)

Body/Electrical · severity: Low to Moderate - neither fault is safety-critical or drivetrain-related. A bonnet latch switch fault can affect an anti-theft/hood-ajar warning function; a current sensor communication fault can affect the vehicle's smart-charging/battery-monitoring strategy, which over time could affect charging behaviour, but neither directly disables the vehicle. · confidence: 78/100 · 2 cited sources

The specific fault codes and inspection steps to check before you buy, a full repair-cost estimate, TSB/recall reference, and the buyer negotiation tip for this issue are included in the R99 vehicle report.

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This guide summarises documented, sourced findings for the Mazda Demio generally. It is not an assessment of any specific vehicle - mileage, service history and condition vary by example. A full AutoLytiQs™ report checks a specific listing against this data plus a live South African market valuation.