Is it essential to perform the RESET MEMORY (AT initialization) after replacing the automatic transaxle assembly or the Engine Control Module on 2004 Toyota Avalon?

When replacing the automatic transaxle assembly or engine assembly or ECM unit one must perform a RESET MEMORY (AT initialization) because battery terminal disconnection does not provide initialization completion.

OEM 2004 Toyota Avalon Engine Control Module

Engine Control Computer

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2 Engine Control Modules found

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2004 Toyota Avalon ECM
Part Number: 89661-07373
$995.38 MSRP: $1458.75
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Product Specifications
- Other Name: Computer, Engine Control; Engine Control Module
- Part Name Code: 89661
- Item Weight: 2.20 Pounds
- Item Dimensions: 13.0 x 10.1 x 4.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89661-07373
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2004 Toyota Avalon Submodels:
- XL, XLS | 6 Cyl 3.0 L GAS
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2004 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 2004 Toyota Avalon Submodels:
- XL, XLS | 6 Cyl 3.0 L GAS

2004 Toyota Avalon Engine Control Module

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2004 Toyota Avalon Parts Questions & Experts Answers

Q: Is it essential to perform the RESET MEMORY (AT initialization) after replacing the automatic transaxle assembly or the Engine Control Module on 2004 Toyota Avalon?
A: When replacing the automatic transaxle assembly or engine assembly or ECM unit one must perform a RESET MEMORY (AT initialization) because battery terminal disconnection does not provide initialization completion.