Mercedes-Benz M273 V8 ME9.7 ECU ECM Replacement – New Module, Programming Included

Mercedes-Benz M273 4.7L / 5.5L V8 ME9.7 ECU ECM Replacement – New Module, Programming Included NEW aftermarket replacement Engine Control Module (ECU/ECM/PCM) for Mercedes-Benz vehicles equipped with the M273 V8 engine. Programming is included. This is a brand-new aftermarket replacement ECU, professionally programmed to your vehicle using the data from your original engine computer. We transfer the necessary vehicle-specific information, including VIN, immobilizer data, coding, and calibration information, so the replacement arrives ready for installation. Unlike a used junkyard ECU, you are receiving a new replacement module rather than another used computer with unknown history. What You Receive Brand-new aftermarket ME9.7 engine computer Programming included Original ECU data transferred to the replacement VIN and immobilizer data programmed Vehicle-specific coding and calibrations transferred when applicable Bench tested before shipment Plug-and-play installation Your original ECU is required as the core and is retained by us Compatible Engine Mercedes-Benz M273 V8 The M273 was offered primarily in 4.7L and 5.5L V8 configurations. Common applications include: S450 S500 S550 E500 E550 CLS500 CLS550 CLK500 CLK550 CL500 CL550 ML500 ML550 GL450 GL500 GL550 R500 R550 SL500 SL550 Applications vary by year, chassis, engine version, software, and ECU part number. Always verify your original ECU part number before ordering. Common Compatible Part Numbers This replacement is available for many Mercedes-Benz M273 ME9.7 applications, including various ECU part numbers beginning with: A273153**** 273153**** Bosch ME9.7 part numbers and other compatible M273 engine computer part numbers Part number compatibility is critical. The M273 was used across multiple Mercedes-Benz models and configurations, and not every M273 ECU is interchangeable. The replacement must be compatible with your specific vehicle and original ECU. Not sure if yours is compatible? Send us a photo of the label on your original ECU or provide your VIN and we will verify compatibility before you order. Plug-and-Play Installation Once programmed, the replacement ECU is designed to be installed directly into the vehicle. No dealer programming should be required after installation. Installation is straightforward: Remove your original engine computer. Send the original ECU to us as the required core. We program the new replacement ECU using your vehicle's original data. We ship the programmed replacement ECU back to you. Install the replacement in the vehicle and start driving. Professional installation is recommended. Why Replace the ECU? A failing M273 engine computer can cause a variety of drivability and communication problems, including: No-start or crank/no-start Intermittent stalling Engine misfires Check Engine Light Communication problems with the ECU Limp mode Various internal ECU fault codes Loss of control over engine functions Important: These symptoms can have many causes. Programming a replacement ECU will not correct a vehicle problem caused by wiring, power supply, sensors, actuators, or another control module. Proper diagnosis should be performed before replacing the ECU. How the Core Process Works The price includes programming, but your original ECU must be sent to us. After purchasing: Remove your original ECU from the vehicle. Package it securely and ship it to us. We extract the required vehicle-specific data from your original module. We program the new aftermarket ME9.7 ECU. We test the programmed replacement. We ship the programmed replacement ECU back to you. We keep the original ECU as the core. It is not returned with the replacement. Important Core Requirement Your original ECU is required for programming. If the original ECU is completely non-communicative or has severe internal damage, we may still be able to program the replacement, but additional charges may apply depending on what data can be recovered. If your original ECU has been previously modified, damaged, or replaced with an incorrect unit, please contact us before ordering. Warranty 6-Month Limited Warranty The replacement ECU is covered against defects in the replacement module and our programming workmanship for 6 months. Warranty does not cover failures caused by vehicle wiring problems, incorrect installation, water damage, electrical shorts, over-voltage, or other external causes. Before Ordering Please verify the part number on your original ECU before purchasing. For the fastest fitment confirmation, send us: Vehicle year Model VIN Photo of the ECU label Original ECU part number We will confirm compatibility before you send your core. New replacement ECU + programming included + your original data transferred + plug-and-play installation. © 2026 Velectronix. All Rights Reserved. This product description is original content. Unauthorized copying, scraping, or reproduction is prohibited. Protection ID: VELECTRONIX-ORIGINAL-CONTENT-2026-V1