Lexus NX 350
2.4L turbo four — replaces the 3.5L V6 in the 2023+ RX and NX 350. Adequate power but noticeably less refined than the V6 it replaces. Timing chain stretch is the long-term concern — inspection at 80,000 miles, replacement at 120,000 miles. EGR cooler cracks have been documented on early units. Fuel injection system issues can appear around 50,000-60,000 miles. Still a young engine with limited long-term data. The turbo-four in a luxury SUV feels like a cost reduction, not an improvement.
Turbo NX — quick but unproven long-term
275 hp in a compact SUV is genuinely quick. The T24A-FTS turbo is shared with the Crown, RAV4, and RX. New touchscreen infotainment is a massive improvement over the old touchpad. Timing chain stretch and EGR cooler cracks are the emerging concerns. AWD standard on the NX 350. A compelling package if the engine proves durable.
Engine Weaknesses 3
The T24A-FTS timing chain stretches over time despite Toyota marketing it as maintenance-free. Tensioners compensate initially but eventually the chain develops a subtle rattle. If unaddressed, the chain can jump or break, requiring engine replacement. Inspection recommended at 80,000 miles, replacement at 120,000 miles. Expected lifespan of the engine is 160,000-180,000 miles with proper maintenance.
Symptoms: Subtle rattling noise on cold start, check engine light (timing codes), rough idle, reduced power
Early production T24A-FTS engines show cracking of the EGR cooler, allowing coolant to leak into the combustion chamber. Produces white smoke from exhaust and progressive coolant loss. The EGR valve itself can also clog around 100,000 miles. Early 2022-2023 production units appear most affected.
Symptoms: White smoke from exhaust, coolant level dropping with no visible external leak, sweet smell from exhaust
The D-4ST dual injection system is sensitive to fuel quality and purity. Injector fouling documented around 50,000-60,000 miles. The engine requires 91 octane premium fuel — using regular fuel can cause damage and may void warranty. Regular fuel filter changes recommended.
Symptoms: Rough idle, hesitation under acceleration, check engine light, reduced fuel economy
Vehicle Weaknesses 10
Loose connection in spiral cable may prevent driver airbag deployment in a crash. Recall 25LA02.
Wheel lug bolts corrode prematurely, making removal difficult during tire changes. Lexus is aware and developing a remedy. Apply anti-seize compound during tire rotations as prevention.
12V battery drains if vehicle sits unused for extended periods. Electronic modules fail to enter deep sleep. More common on vehicles with multiple connected services active.
Same VSC software issue as the RX ALA10 — stability control may not re-enable after restart. Free dealer software update.
Transmission jerks shifting between drive and reverse, hesitates on acceleration. Class action filed.
New touchscreen infotainment has software bugs: CarPlay/Android Auto disconnects, Bluetooth pairing drops, screen freezes. Software updates improve over time. A significant improvement over the old touchpad despite the bugs.
Reports of windshield cracking without visible impact damage. Stress cracks may develop from temperature differentials or manufacturing defect. OEM windshield replacement costs over $1,000 due to integrated sensors and cameras. Aftermarket glass is significantly cheaper but requires recalibration of safety systems.
Electric fuel door release fails to open when button is pressed. Dealer replacement under warranty. Known issue acknowledged by Lexus service departments.
Slight thump or jar when shifting from second to third gear during cold starts. Goes away once the transmission warms up. Reported across multiple 2022+ NX units. Not a progressive failure. Likely a calibration characteristic rather than a defect.
Qi pad stops charging after 30 seconds, especially iPhones with cases. Revised unit 861C0-F6010.