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2021 Hyundai Bayon problems

A 2021 Hyundai Bayon is now 5 years old, so an average example has covered around 67,500 miles. This is the first model year of the generation · early-build cars carry the highest share of teething faults and the most recall activity, so check the service history for completed recall work. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2021 car has usually reached the mileage where they appear.

Compiled & reviewed by the VehicleFaults Research Team

Quick answer

The 2021 Hyundai Bayon is 5 years old, so an average example has covered roughly 67,500 miles. At that mileage 5 of the documented faults are already due, so check those first.

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Faults a 2021 example has usually reached

Documented onset mileage is at or below the ~68k miles an average 2021 car has covered.

EngineLow

Carbon build up on the 1.0 T-GDi

Typically appears
50,000+ miles
What to inspect
Cold start and check idle quality
InteriorLow

Trim wear on hire and lease returns

Typically appears
40,000+ miles
What to inspect
Inspect seats, wheel and gear knob wear
TransmissionMedium

Jerky gear changes or failure to engage the clutch smoothly on iMT (Intelligent Manual Transmission) models due to actuator hesitation.

Typically appears
20,000-40,000 miles
What to inspect
Depress the clutch pedal with the engine off to listen for excessive actuator clicking, then test for smooth take-up during a low-speed forecourt manoeuvre.
SuspensionLow

Clunking or knocking noise from the front end caused by premature wear of the front anti-roll bar drop links.

Typically appears
30,000-50,000 miles
What to inspect
Rock the vehicle side to side aggressively while stationary and listen for knocks, or drive over a forecourt speed bump at low speed with the windows down.
DrivetrainHigh

Juddering or hesitation when pulling away from a standstill on models equipped with the 7-speed DCT, indicating dry clutch pack wear or overheating.

Typically appears
40,000-60,000 miles
What to inspect
Perform a hill start or pull away very slowly from a standstill on the forecourt; feel for vibrations through the seat or hesitation before the clutch fully engages.

Faults that appear at any mileage

Age, electronics and build-related issues that are not mileage-driven.

ElectricalLow

Infotainment and camera faults

Typically appears
Age-related
What to inspect
Test the screen, camera and mirroring
BrakesMedium

Rear disc corrosion on low mileage cars

Typically appears
Age-related
What to inspect
Inspect rear discs for pitting
ElectricalMedium

48V Mild Hybrid system warning light on the dash or failure of the engine to seamlessly restart during stop-start operation.

Typically appears
3-4 years
What to inspect
Check the dash for hybrid system warnings on start-up. Trigger the stop-start system on the forecourt to ensure the belt-starter generator restarts the engine instantly and smoothly.

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Hyundai Bayon · frequently asked questions

Is the Bayon a safe buy?

Yes, very low fault rate so far.

Warranty?

Five years transferable, which helps resale.

Weak point?

Interior plastics rather than mechanicals.

Does the 1.0 T-GDi engine use a timing belt or a timing chain?

The 1.0-litre T-GDi engine fitted to the Bayon utilises a timing chain rather than a belt. While designed to last the lifetime of the vehicle, chain stretch can occur if previous owners have neglected scheduled oil changes. Always verify the service history to ensure correct grade oil was used at the required intervals.

What should I look out for with the Intelligent Manual Transmission (iMT)?

The iMT features an electronic clutch-by-wire system, meaning there is no mechanical link between the pedal and the clutch. Ensure the system engages smoothly without hesitation. If the pedal feels disconnected or the car stalls unexpectedly during forecourt manoeuvres, it may require a software update or a new clutch actuator.

Does the 48V mild-hybrid system affect boot space or spare wheel provision?

Yes, the 48V lithium-ion battery is located under the boot floor. This reduces the overall luggage capacity slightly compared to non-hybrid models and completely removes the space required for a spare wheel. Dealers must ensure the tyre inflation kit is present and in date, as customers often query the lack of a spare.

Other Bayon model years

202520242022

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