What are the guidelines and requirements for reprogramming the Engine Control Module on 2003 Toyota Avalon?

Starting in 2001, Toyota/Scion and Lexus vehicles feature flash reprogrammable Powertrain Control Modules (PCM). Reprogramming should follow Technical Service Bulletins. Use validated tools like the Toyota/Lexus scantool or J2534 interfaces. The process requires specific software and equipment, and must be uninterrupted to avoid damaging the vehicle controller.

OEM 2003 Toyota Avalon Engine Control Module

Engine Control Computer

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2003 Toyota Avalon ECM
Part Number: 89661-07372-84
Product Specifications
- Other Name: Reman Computer; Engine Control Module
- Replaces: 89661-07370, 89661-07371, 89661-07371-84
- Item Weight: 2.20 Pounds
- Item Dimensions: 12.8 x 9.9 x 4.1 inches
- Condition: New
- SKU: 89661-07372-84
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2003 Toyota Avalon Submodels:
- XL, XLS | 6 Cyl 3.0 L GAS

2003 Toyota Avalon Engine Control Module

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2003 Toyota Avalon Engine Control Module Parts Q&A

Q: What are the guidelines and requirements for reprogramming the Engine Control Module on 2003 Toyota Avalon?
A: Starting in 2001, Toyota/Scion and Lexus vehicles feature flash reprogrammable Powertrain Control Modules (PCM). Reprogramming should follow Technical Service Bulletins. Use validated tools like the Toyota/Lexus scantool or J2534 interfaces. The process requires specific software and equipment, and must be uninterrupted to avoid damaging the vehicle controller.