Hyundai Santa Fe: common faults & what to check

Can't confirm for this car

The MX5 Santa Fe 2.5 T-GDI petrol uses an 8-speed wet dual-clutch transmission that has been troublesome enough that Hyundai dropped it for the 2026 model year in favour of a conventional torque-converter automatic. Early 2024 build cars were subject to a safety recall (NHTSA campaign 24V-529; Hyundai Australia issued its own DCT software recall) because transmission-control-unit software could inadvertently disengage or mis-engage the clutches, potentially damaging the transmission case/parking pawl and allowing the car to roll away while shown in Park. The remedy is a TCU software update, but where a transmission was already damaged Hyundai replaced the whole unit under warranty. Separately, owners report low-speed shudder, hesitation and rough shifts, which on an out-of-warranty car is an expensive repair. Confirm the recall software has been applied and that no unrepaired damage remains.

Where to look: 8-speed dual-clutch transaxle (front of vehicle); assess during low-speed manoeuvres and Park engagement on a gradient

Parts involved: Torque converter, Clutch.

Can't confirm for this car

Unconfirmed. This entry does not match our record of which engines and years this model was sold with, and is awaiting review. Confirm it against the car before acting on it.

The 2.7 V6 petrol engine (G6BA in SM, G6EA in CM) uses a timing belt on an interference design, meaning belt failure causes immediate piston-to-valve contact and catastrophic internal engine damage including bent valves and damaged pistons. The factory recommended replacement interval is 90,000 km but the belt and tensioner are known to fail earlier, particularly when the water pump (driven by the same belt) begins to leak and contaminates the belt. Many used examples have unknown or overdue belt history, making this the primary risk item on purchase.

Where to look: Front of engine beneath timing cover

Parts involved: Timing belt.

Can't confirm for this car

The D4EA diesel is an interference engine — belt failure causes valve-to-piston contact and catastrophic cylinder head damage. Belt tensioner and idler pulley failures account for many premature breaks well before the OEM 90,000 km interval. JDM-imported SM Santa Fes frequently arrive with unknown service history, making belt age unknown.

Where to look: Front of engine block behind plastic timing cover, driver-side

Parts involved: Timing belt.

Can't confirm for this car

Unconfirmed. This entry does not match our record of which engines and years this model was sold with, and is awaiting review. Confirm it against the car before acting on it.

The 3.3-litre Lambda V6 GDI engine in DM Santa Fe models is documented to suffer excessive oil consumption, particularly above 100,000 km. Carbon deposits build up on piston rings, causing the rings to stick and no longer seal the combustion chamber; oil then passes into the combustion chamber and is burned. Owners report needing to add up to 1 litre of oil per 1,000 km between service intervals. Carbon accumulation on intake valves—a known weakness of direct-injection engines—further impairs combustion efficiency. Neglected oil levels accelerate bearing wear and can lead to catastrophic engine failure.

Where to look: Engine combustion chamber and intake valve ports

Can't confirm for this car

The TM Santa Fe's 8-speed A8LF1 automatic transmission can exhibit harsh, jerky downshifts when the driver requests full or near-full throttle kickdown from highway cruise speeds. The symptom presents as an abrupt lurch or clunk as the transmission drops two or more ratios in rapid succession. Early production TM vehicles from 2018 to 2020 were more prone prior to ECU calibration updates being released. Contributing factors include aggressive shift map programming, marginal valve body tolerances in early production units, and degraded ATF reducing clutch engagement smoothness. Hyundai released multiple software calibration updates addressing shift quality but some mechanical cases require valve body replacement.

Where to look: Transmission tunnel — 8-speed A8LF1 automatic transaxle; the valve body governing shift quality is located inside the transmission oil pan beneath the unit

Parts involved: Mechatronic / valve body, Clutch.

Can't confirm for this car

The A6MF1 and A6MF2 six-speed automatic transmissions used across DM-generation Santa Fe models develop solenoid and valve body faults that cause harsh, delayed, or erratic gear shifts, particularly noticeable as a firm 1-2 upshift, reluctance to engage reverse cold, and hunting between gears under light load. The linear solenoids controlling clutch pack pressure degrade and can stick, causing the TCM to default to limp mode. Contaminated or degraded transmission fluid accelerating solenoid bore wear is the root cause in the majority of documented cases.

Where to look: Transmission unit under the vehicle — valve body accessible via lower transmission oil pan

Parts involved: Mechatronic / valve body.

Can't confirm for this car

The DM Santa Fe R2.2 diesel DPF (diesel particulate filter) requires regular motorway-speed driving to complete passive regeneration. Vehicles used predominantly in city traffic accumulate soot and fail to regenerate, eventually triggering limp mode and requiring forced regeneration or filter replacement. DPF replacement is expensive and many examples in NZ/AU have had DPF issues by 150,000 km.

Where to look: Exhaust system beneath vehicle, downstream of catalytic converter, typically under centre/rear of vehicle

Parts involved: Diesel particulate filter.

Can't confirm for this car

The Rack-Mounted Motor Driven Power Steering (R-MDPS) system on CM and DM Santa Fe models uses a brushed DC electric motor attached directly to the steering rack to provide hydraulic-free power assistance. Carbon brushes within the motor wear progressively with use, typically manifesting between 120,000 and 180,000 km. Worn brushes cause intermittent contact, generating electrical noise and voltage spikes detected by the EPS control module. The module interprets abnormal motor current as a fault condition and disables assistance as a safety default, leaving the driver with full manual steering effort. Symptoms are often intermittent initially — the system resets when the ignition is cycled — but become permanent as wear progresses.

Where to look: Steering rack assembly under centre of vehicle, electric motor mounted on rack housing

Parts involved: Steering rack.

Can't confirm for this car

Non-hybrid MX5 Santa Fe models with the 2.5L turbo petrol engine were recalled (NHTSA campaign 25V-659) because the starter motor's B+ positive terminal protective cover may not have been fully installed at the factory. If the terminal is left exposed and the engine bay is deformed in a crash, the live terminal can contact the cooling fan and create an electrical short, increasing fire risk. The defect was discovered after a November 2024 NHTSA crash test produced smoke and potential thermal damage in the engine bay. The remedy is a free dealer inspection and reinstallation of the terminal cover. This affects a large build window of 2.5T petrol cars, so any used example should be checked for completion of the recall.

Where to look: Starter motor B+ positive terminal, lower engine bay near the transmission bellhousing (2.5L turbo petrol)

Parts involved: Starter motor.

Can't confirm for this car

Hyundai issued a formal recall (NHTSA Campaign 09V123000) covering 85,036 MY 2001–2003 Santa Fe vehicles for internal corrosion of the rear trailing arms caused by road salt ingress. The hollow trailing arm structure traps moisture and salt, leading to internal thinning or perforation of the steel wall. If corrosion progresses, the trailing arm can fracture while driving, causing sudden loss of vehicle control. Broader inspection of SM generation Santa Fe also reveals corrosion of the front subframe and lower control arm mounts. In NZ/AU, the salt-belt recall scope does not apply, but the underlying design vulnerability to moisture-trapping hollow arms and the age of SM examples make this a real inspection concern.

Where to look: Rear underbody: trailing arms; front subframe mounting points

Parts involved: Body corrosion.

Can't confirm for this car

Hyundai conducted Service Campaign 947 applying underbody rust protection to 2007–2012 CM Santa Fe vehicles, with a separate campaign for 2013–2018 DM Santa Fe Sport models, acknowledging that the underbody components were susceptible to accelerated corrosion. Reported cases include heavy corrosion of the engine support subframe, particularly where Hyundai routed the air-conditioning drain tube directly into the frame section, concentrating moisture. While the US campaigns targeted salt-belt states, the hollow structural sections and thin underbody coating on CM and DM examples are a documented concern for used buyers in coastal NZ/AU environments.

Where to look: Underbody subframe, sill sections, rear wheel arches

Parts involved: Chassis and structural rust, Body corrosion.

Can't confirm for this car

The DM Santa Fe's front lower control arm ball joints wear prematurely, particularly on vehicles operated on rougher New Zealand and Australian regional roads. Worn ball joints produce a clunking or knocking noise over bumps, speed humps, and uneven surfaces. As wear progresses steering becomes vague and the vehicle may pull to one side, with front tyre wear becoming uneven. A severely worn ball joint risks separating from the steering knuckle, causing sudden and catastrophic loss of steering control. VTNZ and WOF inspectors in New Zealand regularly fail DM Santa Fe vehicles for ball joint play, making this one of the most common pre-purchase suspension concerns on this generation.

Example of the part — not this vehicle

Where to look: Front axle at each lower corner — ball joint pins connect the lower control arm to the base of the steering knuckle, visible from beneath the vehicle with wheels at full lock

Parts involved: Ball joint.

Can't confirm for this car

The CM Santa Fe front lower control arm uses a large hydraulic or bonded rubber inner rear bush at the subframe pivot point. This bush handles significant longitudinal and lateral loads during braking and cornering. Exposure to NZ/AU road conditions, salt, and lack of servicing causes the rubber element to delaminate from the steel sleeve or the hydraulic fluid chamber to rupture, allowing excessive arm movement. The resulting deviation in caster and camber geometry causes the vehicle to wander under straight-line driving and pull under braking. The inner bush is frequently overlooked at WOF inspection as it requires a hoist and deliberate loaded inspection to detect early failure.

Where to look: Front suspension lower control arm, inner pivot bush at subframe mounting point, both sides

Can't confirm for this car

The DM Santa Fe rear brake calipers use sliding guide pins that allow the caliper body to float and apply even clamping force across the brake disc. The rubber boots protecting the guide pins deteriorate and split over time in NZ/AU coastal and wet climates, allowing moisture to contact the steel pins inside aluminium caliper brackets. Galvanic corrosion between the dissimilar metals causes the pins to seize within the bracket bore. A seized pin prevents the caliper from releasing fully after braking, causing constant brake drag on that side. The inner pad wears at a much faster rate than the outer, heat builds in the disc and hub assembly, and braking performance degrades asymmetrically.

Where to look: Rear brake calipers, guide pin bores in caliper bracket, both sides

Parts involved: Brake disc and pads, Body corrosion.

Can't confirm for this car

CM Santa Fe front lower control arm ball joints wear prematurely, particularly on NZ and AU roads with rough surfaces. Worn ball joints produce clunking over bumps and can cause sudden loss of steering geometry. In severe cases the joint can separate, causing wheel collapse. Aftermarket ball joints are available but quality varies significantly.

Example of the part — not this vehicle

Where to look: Bottom pivot of front suspension strut assembly, inner side of front wheel

Parts involved: Ball joint.

Can't confirm for this car

DM-generation Santa Fe models fitted with hydraulic power steering (pre-MDPS) develop rack seal leaks at the inner and outer shaft seals, allowing power steering fluid to weep along the rack and drip onto the subframe. The power steering pump vane seals also deteriorate, causing a pronounced whine at full lock or during low-speed manoeuvring. In severe rack seal failure cases, fluid loss progresses to the point where power-assist effort increases noticeably, creating a safety concern. The condition worsens with age and high ambient temperature cycling.

Where to look: Steering rack mounted on front subframe crossmember; power steering pump on front of engine driven by accessory belt

Parts involved: Steering rack.