1KZ ECU - 89661-26170

Engine Control unit

Not limmited to these part numbers however include

89661-26170

175800-1334

Toyota 1KZ ECU Repair Service
Common Overdrive & Starting Faults

This is a repair service for Toyota 1KZ engine ECUs, which are known to fail with issues such as:

Overdrive not engaging

Intermittent or complete no-start conditions

These failures are typically caused by aged or leaking electrolytic capacitors, which damage the PCB over time. Our Repair Process Includes:

Chemical removal of conformal coating using a controlled hot bath

Desoldering and replacement of all electrolytic capacitors with equal or higher-spec components

Track repair and restoration where corrosion or leakage has caused damage

Re-coating the ECU with a clear, protective conformal layer

Oven bake curing for long-term durability

Full reassembly and bench testing

This process restores the ECU’s reliability and avoids the cost and complexity of replacement or reprogramming.

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