31711AH240

Subaru 31711AH240 Chassis ECU Transmission Automatic Left Dash (2004 Impreza)

The Subaru 31711AH240 Chassis ECU (Engine Control Unit) is a crucial component of the automatic transmission system in a 2004 Subaru Impreza. This ECU, specifically designed for the left-hand dash application, is responsible for managing and coordinating various engine and transmission functions to ensure optimal performance and fuel efficiency.

This Subaru ECU features advanced programming to effectively monitor and control engine functions such as ignition timing, fuel injection, and emission control systems. It also plays a vital role in managing the automatic transmission, including shifting patterns and fluid temperature control. Moreover, it interfaces with other vehicle systems like the ABS (Anti-lock Braking System) and airbag control modules.

Constructed with high-quality materials and robust design, the Subaru 31711AH240 Chassis ECU is built to withstand the rigors of daily driving. It also comes pre-programmed with factory settings to ensure proper vehicle functionality and compatibility with other vehicle systems.

Installing this ECU is a straightforward process, making it an excellent option for DIY enthusiasts or professional mechanics. It is essential to follow the manufacturer's instructions carefully during installation to ensure proper connection and calibration.

In summary, the Subaru 31711AH240 Chassis ECU is a vital component of the automatic transmission system in a 2004 Impreza. Its advanced programming and robust design make it a reliable choice for maintaining optimal engine and transmission performance. Whether you are a DIY enthusiast or a professional mechanic, this ECU is an essential addition to your Subaru repair toolkit.

Buying a Subaru Impreza with the chassis ECM transmission (ECM part number: 31711AH240) and an automatic transmission for the left-hand drive model from the year 2004 comes with both advantages and disadvantages. Let's examine each in detail.

1. Reliability: Subaru is known for its reliable and durable vehicles, especially those with its unique all-wheel-drive system. This Impreza model is likely to provide a smooth driving experience due to its automatic transmission.

2. Fuel Efficiency: The automatic transmission can help improve fuel economy compared to manual transmissions, making it a more cost-effective choice for daily commuting.

3. Comfort: The automatic transmission can make driving more comfortable, particularly in heavy traffic or hilly areas, as it eliminates the need for constant shifting.

1. Cost: Replacing or rebuilding an ECM transmission can be quite expensive. This is a significant investment that should be considered before making the purchase.

2. Complexity: The ECM transmission is a complex system, and any issues can be difficult and time-consuming to diagnose and repair.

3. Availability of Parts: Finding the specific ECM transmission part may be challenging, especially if it is no longer in production or if the supplier has limited stock.

The decision to buy a Subaru Impreza with the 31711AH240 automatic transmission ECM for the left-hand drive model from 2004 depends on your personal circumstances and priorities. If you are looking for a reliable and fuel-efficient vehicle, this model could be a good choice. However, the potential high cost of repairs and the complexity of the system should be carefully considered before making the purchase.

If you are considering buying this specific Subaru Impreza model, I would recommend having it thoroughly inspected by a trusted mechanic to assess the condition of the transmission and the overall health of the vehicle. Additionally, ensure that you have a reliable source for obtaining replacement parts and that you have a budget for potential repairs. If these conditions are met, and you are comfortable with the potential costs, then the Subaru Impreza could be a solid investment.

Details:

Warranty all parts come with our standard 6-month warranty. All purchase prices are final. Impreza 04 transmission; at, 2.5l LHS dash, outback sport. Items are shipped after being paid in full.

A free return label will not be provided for remorse reasons. Ex: pictures, receipts, videos, etc. All body parts are sold as is. Impreza 04 transmission; at, 2.5l LHS dash, ts.

specifications perfoelectric:

• for models: Impreza
• for years: 2004
• brand: Subaru
• mpn: 31711ah240
• part type: Ecm Transmission
• conditions options: Tcm
• genuine oem: Yes
• ipn: 591-65300
• manufacturer warranty: 6 Month
• partout id: A-102228984

payments perfoelectric:

• other
• wallet: apple-pay
• credit card: diners-club

shipping perfoelectric:

• transit: 4-8 days
• class: standard
• type: fixed
• service: standard

offer perfoelectric:

• availability: in stock
• sold #: 14
• prices: $24.99–$215.65
• item condition: Used
• best offers: true
• options: ship-to-home
• in stock #: 5
• started: december 7, 2025

general perfoelectric:

• category: Auto Parts > Electrical Components

seller perfoelectric:

• # reviews: 50536
• rating: 99.3%
• city: seymour, connecticut

returns perfoelectric:

• paid by: seller
• policy: returns accepted
• time: 30 days

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