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The 2003 LS430 has 32 ECU's as follow:
1. Engine
2. Automatic Transmission
3. Electronic Modulated Air Suspension
4. ABS with EBD & BA & TRAC & VSC System and Progressive Power Steering
5. Power Tilt and Power Telescopic Steering Column
6. Supplemental Restraint System
7. Power Seat Control System
8. Rear Left Seat Control System
9. Rear Right Seat Control System
10.Rear Seat Switch System
11.Theft Deterrent System
12.Cruise Control System
13.Engine Immobiliser System
14.Combination Meter System
15.Combination Switch Control System
16.Steering Pad Switch System
17.Rain Sensor System
18.Sliding Roof System
19.Driver Side Junction Block (Body No. 2) Control System
20.Passenger Side Junction Block (Body No. 3) Control System
21.Luggage Room Junction Block (Body No. 4) Control System
22.Front Light (Body No. 5) Control System
23.Driver Door Control System
24.Passenger Door Control System
25.Rear Left Door Control System
26.Rear Right Door Control System
27.Gateway System
28.Audio System
29.LEXUS Navigation System
30.LEXUS Link System
31.LEXUS Park Assist System
32.Air Conditioning System