Product Description

Replace your faulty or non-starting ECU system with this OEM BMW Engine Control Unit Kit, part number 7519308, designed for the BMW 525i E39 2004 with M54 engine (MS43 system).

The MS43 ECU is the main engine management computer, controlling fuel injection, ignition timing, VANOS operation, and overall engine performance. This is a matched ECU kit, providing a reliable solution for ECU failure, immobilizer issues, or no-start conditions.

What’s Included

• Engine Control Unit (DME / MS43 ECU)
• Immobilizer matched components (EWS system depending on kit)
• Key / transponder (if included in set)

👉 All parts are matched from the same donor vehicle

Features

• OEM BMW MS43 ECU Kit
• Part Number: 7519308
• Fits BMW E39 525i (M54 engine)
• Complete engine management system
• Plug-and-play when installed as full matched set
• Direct OEM replacement solution

Condition

Used / OEM (tested working unless otherwise stated)

Important Notes

• Must be installed as a complete matched kit
• May require minor coding depending on vehicle setup
• Professional installation recommended
• Please verify compatibility before purchase

Common Symptoms Fixed

• Engine will not start
• ECU failure or communication error
• Immobilizer / EWS mismatch
• Poor engine performance or misfires
• Fault codes related to MS43 system

Fitment

BMW 5 Series:

• E39 525i
• M54 engine
• 2004 model year

Tags

BMW MS43 ECU 7519308, E39 525i ECU kit, BMW M54 engine control unit, BMW EWS ECU set, BMW engine computer MS43, BMW plug and play ECU kit

Return Policy

Returns are accepted within 14 days of delivery. Items must be returned in the same condition as received and in the original packaging.

The buyer is responsible for return shipping costs.

Any customs fees, taxes, or import duties are the responsibility of the buyer.

All parts are used OEM components. We are not responsible for installation issues, coding requirements, or labor costs. Please ensure compatibility with your vehicle before purchasing.