Complete Guide: Audi A4 B8 2.0L Engine ECM Control Module (2009) | 8K2907115D / 0261201904
Description
Welcome to Automan Spare Parts (www.automanspareparts.com), Canada's leading supplier of electronic control units. We are your number one source for a huge range of OEM ECMs, BCMs, sensors, ABS units, fuse boxes, and TCMs at the cheapest rates in the country, offering fast shipping to New Zealand and all international destinations.
The Engine Control Module (ECM) for the 2009 Audi A4 B8 2.0L TFSI engine is the sophisticated brain of the vehicle, managing everything from fuel injection timing and ignition advance to emission controls. When this critical component fails (often presenting as intermittent starting issues, persistent error codes, or limp mode), a complex decision point arises.
Determining the optimal financial and mechanical threshold to repair or replace a major vehicle component requires a deep dive into cost-benefit analysis, considering long-term reliability against immediate outlay. We’re dissecting scenarios for engines, transmissions, and critical electronics, providing actionable frameworks for making informed decisions beyond simple sticker shock. For your Audi A4 B8 ECM, the choice hinges on the extent of the damage (e.g., specific driver circuit failure vs. irreparable water damage) and the essential Immobilizer (IMMO) programming requirement.
Compatibility Table
To ensure proper fitment for your 2009 Audi A4 B8 with the 2.0L TFSI engine, always match all original part numbers. The following identifiers are associated with this specific Engine Control Module (ECM/ECU):
| Component | Part Number (Audi/OEM) | Manufacturer Number (Bosch) | Production/Software ID (Reference) | Vehicle Application |
| Engine Control Module (ECM) | 8K2907115D | 0261201904 | 1039S29625 | Audi A4 B8 (2009 Model Year) 2.0L TFSI |
Note: Audi part numbers are often superseded. Always verify the latest replacement number with your VIN.
Programming and Other Details
The Replacement Mandate: Programming is Required
Does a replacement Audi A4 B8 ECM need programming?
Yes, absolutely. The most critical detail when replacing an ECM/ECU on a modern Audi is the Immobilizer (IMMO) System. Every new, used, or remanufactured ECM must be electronically paired (married) to your vehicle's existing Immobilizer control unit, keys, and VIN. Without this pairing:
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The engine will not start (or will start and immediately die).
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The vehicle may display security-related warnings.
The most straightforward and cost-effective replacement method is usually a Cloned ECM. This involves copying all data, including the IMMO code, from your faulty original unit to the replacement unit, making it a Plug-and-Play solution that bypasses expensive dealer programming.
Repair vs. Replace Cost-Benefit Analysis
| Option | Pros | Cons | Estimated Cost Range (CAD) |
| Repair (Mail-in) | Cheapest option, avoids most programming if repairable. | Longer vehicle downtime, risk of repair failure, only viable for specific circuit issues. | $350 - $700 |
| Cloned Replacement (Reman/Used) | Faster solution, 100% Plug-and-Play, retains all original software/tuning. | Requires a working core to extract data, potentially higher upfront cost than a repair. | $500 - $1200 |
| New OEM (Dealer/Automan) | Highest reliability, comes with warranty. | Highest cost, requires mandatory dealer or advanced independent shop IMMO programming. | $1500+ (plus labor/programming) |
Frequently Asked Questions (FAQ)
Q: What are the main engine problems that can damage the ECM?
A: Electrical spikes from a faulty alternator, water intrusion (especially if the unit or wiring harness is exposed to moisture), or short circuits in external sensors (like oxygen sensors or injectors) can cause ECM damage.
Q: How long does the programming take?
A: If a professional shop is performing the Immobilizer matching and coding, it can take anywhere from a few hours to a full day, depending on the complexity of the security protocol and the tools used. Cloning services offer the fastest turnaround for installation.
Q: Do Automan Spare Parts units come programmed?
A: We offer specialized cloning services to provide a Plug-and-Play solution for many of our electronic modules. Always confirm your programming needs with our sales team when ordering.
Keyword Phrases
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TLDR (Too Long; Didn't Read)
Your 2009 Audi A4 B8 2.0L ECM (8K2907115D / 0261201904) is a critical component. If it fails, replacement is usually recommended over complex circuit repair. Replacing it requires programming to match the car's immobilizer system. We at Automan Spare Parts are the #1 supplier in Canada for OEM electronic modules and offer the cheapest rates with fast international shipping, including to New Zealand.
