Hyundai Bayon

The G3LE turbo requires adequate oil supply on cold start. Starting too quickly after a long standstill or poor oil quality damages the turbine bearing. Oil changes every 10,000 km maximum are mandatory.

Symptoms: Whining from the turbo area, power loss, blue smoke on acceleration from cold start.

The G3LE Smartstream T-GDi also lacks port injection; intake valves carbon up regularly from around 60,000 km and reduce power and smoothness.

Symptoms: Hesitation under partial load, sluggish throttle response after idle, increased fuel consumption.

Although Hyundai revised the chain tensioner in 2020, the timing chain remains vulnerable to poor oil quality or infrequent changes. Regular short oil change intervals are mandatory on this engine.

Symptoms: Cold-start rattle, camshaft position faults, in the worst case check engine light with chain jump risk.

The G3LE T-GDI shows a tendency toward fuel dilution of the engine oil in hybrid operation and on short trips, due to multi-injection strategies used to prevent LSPI. Shorter oil change intervals are required.

Symptoms: Oil level above maximum, petrol smell in engine oil, increased engine wear with long oil change intervals

Faulty front camera can disrupt the vehicle's CAN bus and cause all sensors and driver assist systems to fail simultaneously. Vehicle no longer starts, keyless entry does not work.

The Bayon BC3's front camera repeatedly causes severe electrical faults, up to complete vehicle failure. Driver assistance systems fail repeatedly, sometimes multiple incidents per vehicle within a short period.

Transmission control unit software can cause unexpected vehicle deceleration. An eCall recall also affects the emergency call system simultaneously. Recall code 41DT05, approx. 1,530 vehicles in Germany.

Front brake discs show above-average wear. First signs such as squealing or vibrations when braking appear from around 25,000 km. Possibly caused by brake force distribution tuning.

The Bayon BC3's electric power steering can become stiff at low speeds or produce unusual noises. Symptoms often appear after 50,000 km and may indicate a defective EPS control unit.

Front camera triggers CAN bus interference that simultaneously disables all vehicle assists and sensors. 3–4 incidents in a few months documented on individual vehicles.