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Kia
Sorento
MQ4·
2020-2026
suv-soft
Value
Price (AUD)
$35k-$85k
Body styles
5-door wagon (7-seat, 3-row)
Drivetrain
Front-wheel drive (3.5 V6 petrol; base HEV), On-demand AWD (Dynamax / HTRAC - 2.2 diesel, HEV AWD, PHEV)
Origin
Korea
Built in
Korea
Overview
The fourth-generation Sorento (MQ4) launched in Australia in mid-2020 and is Kia's flagship three-row family SUV - a monocoque on-road soft-roader on the N3 platform shared with the Hyundai Santa Fe and Kia Carnival. It moved upmarket hard: dual curved screens, a long features list and a 7-year warranty. The Australian range is unusually broad and spans four very different powertrains, each with its own buyer caveats. The 3.5L G6DC V6 petrol (FWD only, conventional 8-speed torque-converter auto) launched the range and is the simplest, cheapest-to-fix drivetrain but thirsty and only FWD. The 2.2L Smartstream D4HE diesel is the volume seller - strong 440Nm, AWD, and genuinely economical, but it is paired with Kia's first-ever 8-speed WET dual-clutch transmission (8DCT) which has a documented early-build electric-oil-pump recall and some low-speed clutch shudder. From late 2021/early 2022 the 1.6 T-GDi Smartstream hybrid (HEV) arrived (FWD or AWD, 6-speed torque-converter auto with an integrated motor) and from 2022 the plug-in (PHEV, AWD only, ~68km EV range on a 13.8kWh battery). Key MQ4 themes for used buyers: confirm the 8DCT electric-oil-pump recall (REC-005586) was done on 2020-2022 diesels, watch for DCT shudder/shift logic, check the dual-screen infotainment (freezes/reboots), and on hybrids verify the high-voltage system and 6-speed auto behaviour. GDi/T-GDi carbon and the diesel DPF/EGR on short trips round out the list.
Engines & variants
3.5L G6DC V6 petrol
Engine
3.5L naturally aspirated multi-point-injection petrol V6 (Lambda II)
Config
V6 NA
Displacement
3470cc
Power
200-206kW @ 6300rpm
Torque
332-336Nm @ 5000rpm
Drivetrain
FWD
Economy
9.7-10.0 L/100km combined (real-world ~11-13)
Tow (braked)
2000kg
Tow (unbraked)
750kg
Transmission
8AT (torque converter)
Timing chain / belt / gear
Timing chain (no scheduled belt replacement)
Pros
- Smooth, refined V6 with a conventional 8-speed torque-converter auto - no DCT/CVT risk
- Port (multi-point) injection means far less intake-valve carbon than a GDi engine
- Timing chain, runs on 91 RON regular unleaded
- Cheapest MQ4 to buy used and the simplest drivetrain to service
Cons
- FWD only in Australia - no AWD with the V6
- Thirsty, especially around town; high real-world fuel use for a family hauler
- Less torque than the diesel for towing and loaded hill work
- Dropped from the range during the run as buyers moved to diesel/hybrid
Known problems
low
High fuel consumption / front torque-steer when loaded
The NA V6 is thirsty in a heavy 7-seat body and being FWD-only it can scrabble for traction or torque-steer under hard throttle when fully loaded. Not a fault, but a real ownership trait that pushed many buyers to the diesel/hybrid.
Fix: Nothing mechanical to fix; budget for fuel and drive smoothly. Choose diesel/AWD if you need traction or economy.
low
Engine mount and accessory pulley wear
At higher km the V6 can develop minor vibration from aging engine/transmission mounts and noise from the accessory belt tensioner/idler - common to high-km V6s, cheap to address.
Fix: Replace failed mount(s) and belt tensioner/idler as needed; diagnose by which mount has lost damping.
2.2L Smartstream D4HE turbo-diesel
Engine
2.2L Smartstream common-rail VGT turbo-diesel I4 with aluminium block, DPF and EGR
Config
I4 turbo diesel
Displacement
2151cc
Power
148kW @ 3800rpm
Torque
440Nm @ 1750-2750rpm
Drivetrain
AWD (Dynamax on-demand; some early base grades FWD)
Economy
6.0-6.1 L/100km combined (real-world ~6.5-8.5)
Tow (braked)
2000kg
Tow (unbraked)
750kg
Transmission
8DCT (8-speed wet dual-clutch)
Timing chain / belt / gear
Timing chain (no scheduled belt replacement)
Pros
- Strong 440Nm makes it the best Sorento for towing and loaded touring
- Genuinely economical - real-world mid-6s to low-8s L/100km
- AWD on most grades; timing chain rather than belt
- The volume seller, so easy to find serviced examples
Cons
- Kia's first 8-speed WET dual-clutch (8DCT) - early-build electric-oil-pump recall and limited long-term data
- Low-speed clutch shudder/judder and occasional jerky take-up reported
- DPF/EGR and intake carbon are a poor fit for short-trip-only city use
- Wet-DCT and diesel repairs are dealer-priced and expensive out of warranty
Known problems
high
8DCT transmission electric oil pump (EOP) recall - loss of drive
Australian recall REC-005586 covered MQ4 Sorentos built ~Oct 2020 to Aug 2022: a crack can form in the PCB of the 8-speed wet DCT's transmission electric oil pump, causing the EOP to fail, hydraulic pressure to be lost and the car to lose drive - an accident risk. Around 8,500 AU cars affected; the fix was a transmission software update and, where needed, EOP replacement.
Fix: Run the VIN through the recall portal and confirm REC-005586 (EOP software/replacement) was completed before buying any 2021-2022 diesel.
high
8DCT low-speed clutch shudder / judder and jerky take-up
Owners report body vibration/shudder when crawling at up to ~5km/h, especially turning or on inclines, plus occasional hesitant or jerky take-up from the wet dual-clutch. Kia issued TSBs and TCU/shift-logic software updates; severe cases need a dual-clutch assembly. The wet 8DCT is a new unit with limited high-km data.
Fix: Apply the latest TCU/shift-logic software update; if shudder persists, have the clutch packs inspected. Test-drive slow crawl and hill take-up before buying.
medium
DPF clogging and EGR / intake carbon (short-trip use)
Like all modern diesels, short urban trips stop the DPF completing regenerations, leading to blockages, forced regens, EGR fouling and intake-side carbon, with limp-mode and warning lights. A poor match for a car used only for short school runs.
Fix: Do a 20-30 minute highway run regularly to allow regen; clean EGR/intake if fouled; budget for a DPF on neglected town cars. Buy a diesel only if you do longer trips.
medium
Injector and turbo actuator faults at higher km
The common-rail diesel can develop injector wear/leaks and VGT turbo actuator faults at higher km, causing rough running, smoke, boost faults and limp mode - typical modern-diesel ageing items.
Fix: Diagnose with a scan; replace/recode injectors or repair the turbo actuator as needed. Insist on a full diesel service history.
1.6 T-GDi Smartstream hybrid (HEV)
Engine
1.6L turbocharged direct-injection petrol I4 with integrated electric motor (full hybrid)
Config
I4 turbo + electric motor
Displacement
1598cc
Power
169kW combined system (1.6T 132kW + ~44kW motor)
Torque
350Nm combined (engine 265Nm)
Drivetrain
FWD or on-demand AWD (HTRAC)
Economy
5.3-5.8 L/100km combined (real-world ~6.5-8)
Tow (braked)
1650kg
Tow (unbraked)
750kg
Transmission
6AT (torque converter with integrated motor)
Timing chain / belt / gear
Timing chain (no scheduled belt replacement)
Pros
- Uses a conventional 6-speed torque-converter auto (with integrated motor) - NOT a dual-clutch, so it avoids DCT shudder
- Excellent town economy from a small ~1.5kWh self-charging hybrid
- Available FWD or AWD; first petrol Sorento offered with AWD here
- Strong, quiet around-town drive and the family-friendly hybrid pick
Cons
- T-GDi direct injection can build intake-valve carbon over time
- 1.6 turbo works hard in a heavy 7-seat body when fully loaded
- High-voltage hybrid and battery repairs are dealer-priced out of warranty
- Lower 1650kg braked tow than the diesel/V6
Known problems
medium
T-GDi direct-injection intake-valve carbon
The Smartstream 1.6 T-GDi is direct-injected, so carbon can build on the intake valves over time (no port-injection wash), causing rough idle, hesitation or minor misfire at high km.
Fix: Walnut-blast/intake clean if symptomatic; quality fuel and regular oil changes slow it.
medium
Hybrid transmission / shift-by-wire fault (lock in Park)
The hybrid's 6-speed auto integrates a wet engine-clutch and high-voltage motor; shift-by-wire and HV-control communication faults have been reported on the wider 1.6T hybrid family, occasionally locking the car in Park or throwing warnings.
Fix: Diagnose with a scan; apply control-module software updates; address any failed actuator/clutch component under warranty where possible.
low
12V battery drain / hybrid system warnings
Like many modern hybrids the auxiliary 12V can be flattened by standby loads or a tired battery, triggering hybrid-system warnings and no-start; often a battery or parasitic-draw issue rather than the HV pack.
Fix: Test/replace the 12V battery; have parasitic draw measured; fit a maintainer if parked for long periods.
1.6 T-GDi plug-in hybrid (PHEV)
Engine
1.6L turbo direct-injection petrol I4 with larger electric motor and ~13.8kWh plug-in battery
Config
I4 turbo + electric motor (plug-in)
Displacement
1598cc
Power
195kW combined system
Torque
350Nm combined
Drivetrain
AWD (HTRAC)
Economy
1.6 L/100km combined (PHEV cycle); ~68km EV range
Tow (braked)
1010-1500kg
Tow (unbraked)
750kg
Transmission
6AT (torque converter with integrated motor)
Timing chain / belt / gear
Timing chain (no scheduled belt replacement)
Pros
- Up to ~68km electric-only range from the ~13.8kWh battery - can do most commutes on power alone
- AWD standard (HTRAC) and a conventional 6-speed torque-converter auto, not a DCT
- Most powerful Sorento (195kW combined) and very cheap to run if charged regularly
- Strong, refined drive with EV silence around town
Cons
- Only worthwhile if you can charge it - thirsty as a heavy petrol if the battery is flat
- Most expensive Sorento to buy; complex plug-in HV system to repair out of warranty
- Reduced boot/cargo and lower tow rating than diesel due to battery packaging
- T-GDi intake carbon and the same hybrid driveline electronics as the HEV
Known problems
medium
Drive battery degradation / reduced EV range
Like all PHEVs the ~13.8kWh traction battery slowly loses capacity, cutting electric range over years/cycles. Out of warranty a pack or module replacement is very expensive. Capacity is typically covered by Kia's HV-battery warranty - verify it is intact.
Fix: Check the HV-battery warranty status and any state-of-health report; charge regularly and avoid leaving it at 0% or 100% long-term.
medium
Charging system / onboard charger and 12V faults
PHEV-specific charging faults (onboard charger, charge port, or contactor) and 12V/standby drains can prevent charging or trigger HV-system warnings. The wider Kia/Hyundai HV-charging hardware has seen software and component campaigns.
Fix: Diagnose with the dealer; apply control software updates; replace charger/port hardware under warranty where covered. Test that it actually charges before buying.
low
T-GDi direct-injection intake-valve carbon
Shares the HEV's 1.6 T-GDi, so the petrol engine can accumulate intake-valve carbon over high km, especially if it rarely runs warm because most trips are EV-only.
Fix: Run the petrol engine to temperature periodically; walnut-blast/intake clean if symptomatic.
Common problems (all variants)
medium
Dual-screen infotainment freezes, black screen and reboots
The MQ4's twin curved displays are widely reported to freeze, go black for minutes, enter reboot loops or take up to several minutes to come good after start-up, with Apple CarPlay/Android Auto dropouts. A common and frustrating MQ4 complaint across all engines.
Fix: Apply the latest head-unit software/firmware update first; replace the display/head unit if hardware-faulty (often under warranty).
medium
ICCU / lighting and electrical recalls (PE facelift)
Australian recall REC-006239 covered 2023-2024 MQ4 PE Sorentos for a software issue where the turn indicators and/or upper Daytime Running Lights may not operate as intended, reducing visibility; the fix inspects/replaces the ICCU and upgrades its software. The MQ4 has been subject to several electrical campaigns.
Fix: Run the VIN through the Australian recall portal and confirm REC-006239 and any other outstanding recalls have been completed.
low
Brake / suspension knocks and front-end noise
Owners report front-end knocks, clunks over bumps and the occasional brake groan, typically from suspension bushes/links, sway-bar links or brake hardware as the car ages - common niggles on a heavy three-row SUV.
Fix: Diagnose and replace the worn link/bush or fit anti-squeal/lube to brakes; not usually safety-critical.
low
Paint chips and trim/rattles
Stone chips on the bonnet/front and the odd interior rattle or trim squeak are reported, as on most modern SUVs; cosmetic rather than mechanical.
Fix: Paint protection film up front; touch-up panels; locate and pad interior rattles.
low
Climate / electrical niggles and software bugs
Assorted software-driven niggles - climate control quirks, sensor/parking-aid false alerts, and occasional warning lights - that are often resolved by a dealer software update rather than parts.
Fix: Have outstanding control-module software updates applied; diagnose any persistent fault before assuming a hardware failure.