Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Sale

Ignitions and Electrical› Computers, Chips, Modules and Programmers

Lexus

ECM ECU PCM 3.0L

Name: ECM ECU PCM 3.0L
Brand: Lexus
SKU: 89666-30351

$1,195.91 $581.95 Save $613.96

SKU: 89666-30351

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Flagship One 89666-30351 is an engine computer, also referred to as an ECM, ECU, or PCM. This unit is a guaranteed replacement for all 2006 Lexus GS300 PCM models with a 3.0L engine and the matching part number 89666-30351.

This engine computer comes programmed to your vehicle's specific VIN, ensuring all internal modules communicate properly. It is also flashed with the latest software updates to enhance fuel economy and optimize performance. Each unit undergoes off-board testing by in-house mechanics to ensure peak performance. No additional programming is required upon installation.

Show original supplier description

The Flagship One 89666-30351 is a guaranteed replacement Engine Control Module (ECM), Engine Control Unit (ECU), and Powertrain Control Module (PCM) specifically designed for the 2006 Lexus GS300 models equipped with a 3.0L engine and the matching part number 89666-30351. This unit comes programmed to your vehicle's unique VIN, ensuring all internal modules communicate correctly. It is also flashed with the latest software updates, which can lead to improved fuel economy and optimized engine performance. Each module undergoes rigorous off-board testing by certified in-house technicians to guarantee it is operating at peak performance, eliminating the need for further programming after installation. Flagship One offers a free lifetime warranty and free domestic shipping with a quick turnaround time. They also provide a no core charge, allowing you to keep your old unit. All units are guaranteed OEM and are refurbished and 100% tested in-house to address common PCM issues such as electrical problems, failure to start, fault/trouble codes, intermittent issues, loss of power, no ignition or injector pulse, poor fuel economy, and shifting problems.

Vehicle Symptoms

Engine cranks but won't start
Check engine light stays on constantly
Intermittent stalling while driving
Poor fuel economy and rough running
No communication with diagnostic scanner

Diagnostic Codes

P0601: Internal Ctrl Module Memory Check Sum Error
P0602: Ctrl Module Programming Error
P0603: Internal Ctrl Module Keep Alive Memory (KAM) Error
P0605: Internal Ctrl Module Read Only Memory (ROM) Error
P0606: ECM/PCM Processor

Relevant Conversations

2006 Lexus GS300 ECM replacement cost
Lexus GS300 ECU not communicating with scanner
P0601 code Lexus GS300 fix
Car cranks no start after replacing sensors Lexus GS300
Lexus GS300 PCM failure symptoms
Where to buy preprogrammed ECM for 2006 Lexus GS300
Lexus GS300 check engine light and stalling
How to test ECM on Lexus GS300
Flagship One vs OEM Lexus ECM
2006 Lexus GS300 89666-30351 ECU replacement

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	Lexus
Part Number	89666-30351
Category	Ignitions and Electrical

Videos

4 Easy Steps for PCM ECM ECU Key Cycling Installation

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy