Engine Control Module

The Toyota 89661-17331 is a genuine, new Engine Control Module (ECM), also referred to as an Engine Control Unit (ECU) or Powertrain Control Module (PCM). This direct replacement unit is specifically guaranteed for all 1991 Toyota MR2 PCM models featuring a 2.0L engine and carrying the matching part number 89661-17331. It is also listed as fitting 1990-1992 Toyota MR2 models with 4-cylinder 2.0L (3SGTE) and 2.2L (5SFE) engines. This ECM comes programmed to your vehicle's specific VIN, ensuring all internal modules communicate correctly. It is also flashed with the most recent software updates, which can enhance fuel economy and optimize vehicle performance. The unit is rigorously tested by in-house mechanics to ensure peak performance and to address common PCM issues such as electrical problems, failure to start, fault codes, intermittent operation, loss of power, no ignition or injector pulse, poor fuel economy, and shifting problems. No additional programming is required upon installation; simply plug it in and go. To ensure proper programming, the Vehicle Identification Number (VIN) is required. This can be provided during the checkout process or sent later via email or phone. The manufacturer also notes that this part replaces part number 89661-17332-84.