Hyundai Trajet Problems & Known Issues

The load-bearing structure around subframe, spring and suspension mounting points suffers severe corrosion on the Trajet, particularly affecting the rear subframe where the multi-link rear suspension attaches. Korean-built vehicles from this era used thinner steel sections that are vulnerable to road salt penetration. The corrosion typically starts around the mounting bushes and spreads through the structural metalwork. This is classed as a prescribed area failure under MOT testing and renders the vehicle immediately dangerous to drive.

Brake pipes on the Trajet suffer from premature corrosion, with MOT failure rates 3.7 times higher than the fleet average. The steel brake lines are inadequately protected against road salt and moisture, with the rear brake lines particularly vulnerable where they run along the underside of the vehicle. Corrosion typically starts at pipe clips, unions, and areas where the protective coating has been damaged by stone impact.

The constant velocity joint protective boots on driveshafts deteriorate prematurely on the Trajet, with the outer joints particularly affected. The rubber boot material appears to harden and crack earlier than expected, allowing water and contamination into the CV joint. This is most severe on petrol variants where MOT data shows failure rates 8.7 times higher than the fleet average. Once the boot splits, rapid CV joint wear follows within a few thousand miles.

Suspension components including control arms, links and brackets suffer excessive corrosion on the Trajet, particularly the multi-link rear suspension assembly. The steel components were not adequately protected against UK road conditions and corrosion accelerates once the protective coating is compromised. Diesel variants show higher failure rates in MOT data, likely due to higher average mileages exposing them to more winter salt exposure.