EngineCritical
Theta II 2.4L/2.0T engine failure and oil consumption (recall/warranty history matters).
- Typically appears
- 60,000+ miles
- What to inspect
- Listen for knock; confirm knock-sensor recall and any engine work; check oil level.
2016–2020 Kia Sorento · common problems & known faults
The Sorento is a practical, value three-row SUV, but the Theta II 2.4L/2.0T engines and a few electronics items need checking.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Quick answer
The most commonly reported faults on the 2016–2020 Kia Sorento are Theta II 2.4L/2.0T engine failure and oil consumption (recall/warranty history matters), Binding at low speeds, scrubbing noises from the rear axle, or an illuminated 4WD warning lamp due to Dynamax AWD coupling pump failure and Rear end sagging or excessive bouncing over bumps. High-specification UK models feature self-levelling rear shock absorbers which are prone to leaking and are costly to replace. Of the documented issues, 1 rated critical and 2 rated high · these are the ones worth inspecting first. Full inspection points, onset mileage and what to check are listed below.
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Build the inspection planReliability snapshot
Based on the documented faults on this page for the Kia Sorento.
4.1/ 10
- Critical
- 1
- High
- 2
- Medium
- 2
- Low
- 3
Guidance only · reflects reported patterns, not a specific car's condition.
Kia Sorento problems by year
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Known faults to check
ElectricalLow
Infotainment/UVO glitches.
- Typically appears
- Any
- What to inspect
- Test the screen and connectivity.
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Build the inspection planTransmissionLow
Harsh shifts on some units.
- Typically appears
- Any
- What to inspect
- Test-drive for smooth engagement.
HVACLow
AC performance complaints.
- Typically appears
- 70,000+ miles
- What to inspect
- Confirm cold AC.
DrivetrainHigh
Binding at low speeds, scrubbing noises from the rear axle, or an illuminated 4WD warning lamp due to Dynamax AWD coupling pump failure.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Perform a tight figure-of-eight manoeuvre at low speed on the forecourt. Listen for drivetrain binding or juddering from the rear, and check the instrument cluster for AWD error lights.
SuspensionHigh
Rear end sagging or excessive bouncing over bumps. High-specification UK models feature self-levelling rear shock absorbers which are prone to leaking and are costly to replace.
- Typically appears
- 60,000-90,000 miles
- What to inspect
- Visually assess the rear ride height for sagging. Shine a torch behind the rear wheels to inspect the damper bodies for heavy fluid misting or active oil leaks.
Body / ExteriorMedium
Panoramic sunroof rattles over uneven surfaces, binds during operation, or gets stuck off its tracks due to degraded guides and lack of lubrication.
- Typically appears
- 40,000-70,000 miles
- What to inspect
- Fully open and close the panoramic sunroof twice. Observe for jerky, uneven movement, listen for grinding noises, and check the rubber weather seals for tearing.
Electrical / BodyMedium
Smart power tailgate fails to open fully, drops back down unexpectedly, or emits a loud grinding noise due to internal failure of the spindle drive struts.
- Typically appears
- 50,000-70,000 miles
- What to inspect
- Operate the power tailgate using both the key fob and the boot lid button. Ensure it opens fully without manual assistance, holds its maximum height, and closes smoothly.
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Build my inspection planFrequently asked questions
Is the Kia Sorento reliable?
It's good value; the Theta II engine risk makes recall and service history essential.
Which Sorento engine to choose?
The 3.3L V6 avoids the Theta II 2.4L/2.0T concerns and is well-regarded.
What should I verify?
Knock-sensor recall completion and any engine replacement history.
What is the timing belt replacement interval on the 2.2 CRDi engine?
The 2.2-litre CRDi diesel engine, which powers the vast majority of UK Sorento models, utilises a timing chain rather than a rubber timing belt. This chain is designed to last the lifetime of the engine and requires no scheduled replacement, provided routine oil services are strictly adhered to.
How does the seven-seat configuration impact boot space and practicality?
With all seven seats raised, boot capacity is limited to 142 litres, which is only suitable for a few shopping bags. Folding the third row flat expands the load area to a highly practical 605 litres. The third-row seats are best reserved for children due to restricted legroom.
Are there any specific maintenance requirements for the Dynamax AWD system?
While Kia often markets the AWD system as sealed for life, preventative maintenance is highly recommended to prevent coupling failure. Dealers should advise replacing the transfer case and rear differential fluids every 40,000 miles. Neglected fluid can lead to pump failure and expensive replacement of the electro-hydraulic coupling.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.
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