Lexus RX, AL30 (USA / CAN)

Additional Notes

• The Lexus RX 350 (AL30) carries a 9.2-liter service fill capacity for the main cooling system across both AWD and FWD configurations in USA and CAN markets. A service fill value reflects the amount of coolant added during a drain-and-refill procedure, which is typically less than the total system volume measured during a full overhaul.
• The RX 350h Hybrid AWD (USA) main cooling system holds 8.2 liters at service fill, a slightly smaller figure than the 9.2-liter capacity listed for the non-hybrid RX 350 variants. The RX 500h Hybrid AWD (USA) carries the largest main cooling system capacity among all listed configurations at 9.4 liters service fill.
• Each hybrid variant carries a separate inverter cooling circuit alongside the main engine cooling system. The RX 350h Hybrid AWD (USA) inverter circuit holds 2 liters, while the RX 500h Hybrid AWD (USA) inverter circuit holds a notably larger 5.3 liters, reflecting the more complex hybrid powertrain architecture of the 500h.
• The RX 350 AWD and FWD variants in both USA and CAN markets include a separate intercooler cooling circuit with a 2.8-liter capacity. Intercooler circuits are thermally isolated from the main engine coolant loop to maintain consistent charge air temperatures.
• Under normal use conditions, the CAN-market RX 350 AWD and FWD cooling systems are scheduled for coolant changes at 80,000 km or 60 months. The USA-market equivalents follow a 50,000-mile or 60-month interval under the same normal use condition, with the time component remaining identical across both markets.
• Under the first change only condition, CAN-market RX 350 cooling system intervals extend to 160,000 km or 120 months, exactly doubling the normal-use distance and time thresholds. USA-market first-change-only intervals reach 100,000 miles or 120 months, again doubling the normal-use figures.
• USA-market specifications for the RX 350 include a coolant check interval of 15,000 miles or 18 months, applied under both normal and first change only conditions. CAN-market AWD specifications carry no check interval for normal use, while the FWD CAN variant lists a check interval of 8,000 km under the first change only condition only.
• The RX 350h and RX 500h hybrid models in the USA market share the same check and change intervals as the USA-market RX 350, with checks at 15,000 miles or 18 months and normal-use changes at 50,000 miles or 60 months. The first change only intervals for both hybrid models extend to 100,000 miles or 120 months, consistent with the non-hybrid USA configurations.