Lexus RX AL20
Weaknesses, engine ratings and buying advice
The fourth-generation RX (factory code AL20, built 2016 to 2022) marked the visual break with the past: a bold spindle grille, sharp creases and a far more assertive stance. Underneath, though, Lexus stayed true to its virtues — the AL20 is a quiet, comfortable and remarkably reliable premium SUV in the upper mid-size class. It came as the RX 350 with a V6 gasoline engine and as the RX 450h with the further-refined full hybrid, more mature in this generation than ever. For buyers seeking a used luxury SUV with minimal worry potential, the AL20 is one of the safest bets on the market.
The gasoline model received the 2GR-FKS, the most modern iteration of the proven 3.5-litre V6, here making 220 kW. Its D-4S dual injection combines direct and port injection and keeps the intake valves clean — a genuine step forward over pure direct-injection units. Regular items essentially come down to the water pump and ignition coils. Oil seepage from the timing chain cover can occur as a production defect, and slight oil consumption between change intervals is known but uncritical. The hybrid still uses the 2GR-FXE, here with 230 kW system output. Its familiar issue remains the brake actuator (repair 2,500 to 4,000 EUR) and the inverter coolant pump from around 120,000 km.
On the vehicle side, the AL20 is comparatively unremarkable. Owners report occasional rain-sensor malfunctions, a noticeable infotainment lag — the touchpad interface of the era polarized opinion — occasional door rattling and wind noise, and an audible brake actuator sound. The front shock absorbers can thump with mileage. None of this is serious; these are comfort niggles rather than genuine defects.
For the buying decision, the RX 350 with the 2GR-FKS is the most relaxed and durable choice, an engine that offers little to fault. The RX 450h is the more economical variant with the usual eye on the brake actuator. A complete service history matters on any example; given the low fault rate, it's worth holding out for a genuinely well-kept car.
Bottom line, the AL20 is one of the most reliable premium SUVs of its era — technically mature, built to a high standard, and with very manageable weak spots. Buyers after driving dynamics will be happier elsewhere; those who want years of calm and low running costs can hardly go wrong here.
Generations
Engine Overview
The Lexus RX AL20 is available with 3 engine variants — from 249 to 313 hp.
This 3.5-litre V6 in the modern D-4S form combines direct and port injection — exactly what keeps the intake valves clean and sidesteps the carbon build-up that plagues pure direct-injection units. Strong, refined and more economical in daily use than the turbocharged competition. A known production-related oil leak at the timing cover, caused by its seal, is worth keeping an eye on. The water pump can fail prematurely and is the main wear point. A little oil consumption between change intervals is possible, so check the level regularly. Otherwise a very reliable, long-lived naturally aspirated engine.
- !! Front Timing Cover Oil Leak (Production Defect) from 80,000 km
The 2GR-FKS inherited the timing cover leak from the 2GR-FE. First and second production years (2016-2018) were worst affected — a production process issue, not a design flaw. Leaks typically appear by the first or second oil change. Later production years are largely free of this problem. Repair costs are extreme due to engine removal requirement.
Symptoms: Oil leak from front timing cover, oil drip on AC compressor, burning oil smell under hood - !! Premature Water Pump Failure from 80,000 km
The 2GR-FKS shares the water pump weakness with the entire 2GR engine family. Premature failures documented as early as 30,000-50,000 miles. Internal design is improved over the 2GR-FE but longevity remains below Toyota standards. Replacement is moderately labor-intensive.
Symptoms: Coolant leak from water pump area, overheating warning, coolant loss, whining noise from pump - ! Oil Consumption Between Changes from 60,000 km
Some 2GR-FKS engines consume oil between changes. Toyota considers up to 1 quart per 1,200 miles within specification. Owners report consumption beginning as early as 30,000-60,000 miles. The owner's manual instructs to check and top off as needed. Not catastrophic but requires monitoring.
Symptoms: Oil level drops between changes, low oil level warning, need to add oil every 1,000-2,000 miles
3.5L Atkinson-cycle V6 hybrid — the RX 450h powertrain. Brake actuator failure is the defining issue, costing $2,500-$4,000 for replacement. Inverter coolant pump failures documented past 75,000 miles. The hybrid system itself (battery, inverter, e-CVT) is generally robust. Mild oil consumption is normal for Atkinson-cycle operation. Regenerative braking means brake pads last 60,000+ miles. The combination is efficient and smooth but the brake actuator bill can erase years of fuel savings.
- !! Brake Actuator Failure from 80,000 km
The hybrid brake actuator assembly fails, making braking difficult and increasing crash risk. Repair costs $2,500-$4,000 for parts and labor. A documented pattern across RX 400h and RX 450h models. TSB L-SB-0005-21 addresses brake squawk/knock noise via actuator bleed. Not all actuator noise requires replacement — bleed procedure may resolve symptoms.
Symptoms: Hard brake pedal, reduced braking force, ABS warning light, brake squawk or knock noise when pressing/releasing pedal - !! Inverter Coolant Pump Failure from 120,000 km
The electric coolant pump for the hybrid inverter fails, causing inverter overheating. Separate cooling circuit from the engine. Replacement is straightforward but the part is specific to the hybrid system.
Symptoms: Hybrid system warning, reduced power, inverter overheating message, coolant loss from inverter circuit - ! Moderate Oil Consumption from 100,000 km
Atkinson-cycle operation increases oil consumption slightly compared to the standard 2GR-FE. Normal for the hybrid system. Check oil regularly — 1 quart per 5,000 miles is within spec.
Symptoms: Oil level drops between changes, no leaks visible
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rain Sensor Malfunction Rain-sensing windshield wiper system malfunctions, particularly at night. Sensor triggers wipers inappropriately or fails to activate in rain. Primarily reported on 2017 models. Sensor replacement or recalibration typically resolves. Symptoms: Wipers activate without rain, wipers fail to activate in rain, erratic wiper behavior at night | Low | |
| Infotainment System Lag The Lexus Remote Touch interface (touchpad controller) is slow and unintuitive. Navigation input requires excessive concentration. This is a design limitation, not a defect — no fix available beyond replacement with aftermarket head unit. Symptoms: Slow response to touchpad input, difficult navigation entry, cursor overshooting targets | Low |
Top Reported Issues
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Known Problems and Issues +
A total of 11 weaknesses have been documented for the Lexus RX AL20 (2016–2022) — 6 engine-related and 5 vehicle-related. Typical issues affect Electronics, Body, Brakes, Suspension. Considered reliable: 2GR-FKS (3.5L V6 D-4S).
RX (2GR-FXE, 2016–2022) — Be Careful: Brake Actuator Failure, Inverter Coolant Pump Failure, Moderate Oil Consumption. Power: 313 PS.
What to watch out for with the Lexus RX? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Lexus RX AL20 have? +
What should I look for when buying a used Lexus RX AL20? +
Which engine is recommended? +
Which Lexus RX AL20 engine is the most reliable? +
Which Lexus RX AL20 engine is the most fun? +
Is the Lexus RX AL20 worth buying used? +
What horsepower variants are available for the Lexus RX AL20? +
Last updated: February 2026 · All information without guarantee