BMW N54 135i 335i 1M X6 MSD81 DME ECU REPAIR UPGRADE SERVICE - LRI Autoparts Hover to zoom · click to expand
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BMW N54 135i 335i 1M X6 MSD81 DME ECU REPAIR UPGRADE SERVICE

$1,650.00$2,250.00 Save $600.00
In stock, ships today
Quantity
or 4 interest-free payments of $412.50 with
Parts warrantyUsed 3 months · new 6 months, unlimited km
Ships todayOrders before 12pm
14-day returns20% restocking fee
Real expertsNot chatbots
Part Number
8006
Brand
LRI Autoparts
Overview

BMW MSD81 ECU Repair & Replacement Service (N54 Engines)

We specialise in BMW MSD81 ECU repair and replacement for N54-powered models, including:
135i, 335i, 1M, X6, and 740i.

If your vehicle is still running the earlier MSD80 ECU, we can also upgrade it to MSD81, eliminating the common MOSFET failure issues found in MSD80 units.

How It Works

  1. Send us your original ECU, CAS, and key.

  2. Once received, we will repair or replace your ECU — typically same or next business day.

  3. Your repaired or replacement ECU, CAS, and key will then be dispatched back to you immediately.

Optional Add-Ons

You can select additional services at checkout, such as:

  • Extra key / remote programmed (Blank manual blade will be included as well, not cut)

Common MSD81 ECU Issues We Repair

  • Water damage or internal corrosion

  • No communication with diagnostic tools or crank-no-start condition

  • Injector and misfire-related fault codes, including:

    • 30BA – DME: Injector 1, 2, 3 / Internal fault

    • 30BB – DME: Injector 4, 5, 6 / Internal fault

    • 29CD – Misfire, Cylinder 1

    • 29CE – Misfire, Cylinder 2

    • 29CF – Misfire, Cylinder 3

    • 29D0 – Misfire, Cylinder 4

    • 29D1 – Misfire, Cylinder 5

    • 29D2 – Misfire, Cylinder 6

    • 29CC – Misfire, multiple cylinders

Our goal is to get your BMW back on the road quickly and reliably — with restored performance and long-term ECU health.
Fast turnaround. Expert service. N54 specialists.

ECU PART NUMBERS: (There are plenty more, ALL MSD81 or MSD80 will work)

  • 7586933
  • 7592080
  • 7621178
  • 7602118
  • 7621178
  • 7595179
  • 7616431
  • 7586933
  • 7592080
  • 7593493
  • 7568842
  • 7575875
  • 7583332
  • 7604567
  • 7611358
  • 7622911
  • 5WK93714
  • 5WK93724
  • 5WK94901
  • 5WK93738
  • 5WK94901
  • 5WK93727
  • 5WK93754
  • 5WK93714
  • 5WK93724
  • 5WK93608
  • 5WK93628
  • 5WK93642 
Shipping & returns

Shipping: Orders placed before 12pm ship same day from our Australian warehouse. Express & standard options at checkout.

Returns: 14-day returns on any part that doesn’t fit or you no longer need. A 20% restocking fee applies. Original packaging required. Start a return from your account.

Parts warranty: Used parts — 3 months, unlimited km. New parts — 6 months, unlimited km. Some listings may specify a different period, which will be noted in the ad. This is a parts warranty only and does not cover labour or fitting. Full terms on our Returns & Warranty policy.

* Product descriptions are written with AI assistance and may contain errors

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BMW N54 135i 335i 1M X6 MSD81 DME ECU REPAIR UPGRADE SERVICE $1,650.00