• BMW MSD81 N54 UPGRADE SERVICE for all 135i, 335i 535i models with the Twin Turbo N54 engine (DME, PROGRAMMING & CODING INCLUDED)
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BMW MSD81 N54 UPGRADE SERVICE for all 135i, 335i 535i models with the Twin Turbo N54 engine (DME, PROGRAMMING & CODING INCLUDED)

BMW MSD81 N54 UPGRADE SERVICE for all 135i, 335i 535i models with the Twin Turbo N54 engine (DME, PROGRAMMING & CODING INCLUDED)

$599.00 USD
$599.00 USD
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BMW MSD80 to MSD81 N54 Upgrade Service

Hey N54 fans! Ready to give your BMW’s twin-turbo heart a boost? At ECU Maverick, we’re offering an awesome MSD80 to MSD81 upgrade service for all you 135i, 335i, and 535i drivers out there. Just send us your DME, CAS module, and one key, and we’ll hook you up with a shiny MSD81—plug-and-play and ready to roll in just 48 hours. Plus, it’s all backed by a one-year warranty.

What’s This Upgrade All About?

If your BMW’s rocking the N54 twin-turbo engine, you’re already in good company. But swapping from the MSD80 to the MSD81 DME? That’s next-level stuff—smoother performance, better tuning potential, and a happier engine overall, and no more mosfets!
We’ve got our own MSD81 units ready to go, and we’ll program it for you at no extra cost. All you need to do is ship us your old setup, and we’ll handle the rest—plug it in, and you’re good to go!

Which BMWs Can Get the Upgrade?

This service is built for any BMW with the N54 twin-turbo engine—think 135i, 335i, and 535i models. Whether you’re zipping around in a sporty 1 Series, cruising in a sleek 3 Series, or enjoying the luxe vibes of a 5 Series, we’ve got the upgrade to match. If your N54’s in there, we can make it happen!

Part Numbers We Work With

We’ve tackled a bunch of MSD80 part numbers for this upgrade—like 12147592080 (7592080), 12147602118 (7602118), 12147604567 (7604567), 12147611358 (7611358), and 12147616431 (7616431). Then there’s 12148612998 (8612998), 12148618862 (8618862), 12148619751 (8619751), 12147586933 (7586933), 12147583332 (7583332), 12147575875 (7575875), 12147574534 (7574534), 12147573863 (7573863), 12147568842 (7568842), 12147568370 (7568370), and 12147567491 (7567491). Even more like 12147586934 (7586934) and 12147592081 (7592081) are in the mix! If your number’s in that ballpark—or even if it’s not—just give us a shout, and we’ll confirm it works.

A few more we’ve upgraded: 7586933, 7592080, 7602118, 7604567, 7611358, 8612998, 8618862, 8619751, 7575875, 7574534, 7573863, 7568842, 7568370, 7567491... we’ve got a ton covered!

How It Works

It’s as easy as it gets: pop your DME (that’s the engine control module), CAS module, and one key in the mail to us. We’ll take your MSD80 setup, upgrade it to an MSD81 we provide, and program it to fit your BMW perfectly—all plug-and-play, no extra fiddling required. Best part? We’ll have it back to you in just one business day. You’ll be back on the road, feeling that N54 power, before you know it!

Why Upgrade With Us?

We’re all about making this smooth and stress-free. The programming’s on us—no hidden fees. We’ve done this upgrade a bunch, and we love seeing N54 owners light up when they feel the difference. Fast, reliable, and BMW-approved—that’s ECU Maverick style!

Ready to Boost Your N54?

Whether you’re itching for better performance or just want to keep your twin-turbo BMW at its peak, this MSD81 upgrade is the way to go. Grab your DME, CAS, and key, ship ‘em over, and let us work our magic. Give us a call to kick things off—you’ll be back behind the wheel in a flash!

Call or Text Now: 239-291-3529
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Remanufactured

We rebuild OEM control modules with upgraded components to prevent common failures. Unlike junkyard parts that may fail within months, our modules are thoroughly tested and backed by a 6-month warranty. If it fails under warranty, reprogramming is free.

How It Works

Ship us your faulty module. We extract your original data (VIN, mileage, key codes, calibrations) and transfer it to a remanufactured unit. Your old module is recycled for parts. You receive a plug-and-play replacement ready to install.

What to Expect

✓ Turnaround: 2-3 business days

✓ Warranty: 6 months

✓ Programming: Not required—plug and drive

✓ Core Required: Yes (your original module)

Who We Are

ECU Maverick isn't just another ECU repair shop, we're electronics nerds who happen to love cars. We've been reverse-engineering, bench-testing, and fixing control modules that other shops call "unfixable." While most places only reprogram or swap ICs hoping to solve the problem, we go deeper: component-level repair. That means we can actually diagnose and replace individual circuits on your module's board, not just clone data and hope for the best.

We're based in Fort Myers, Florida, and we work with repair shops, dealerships, and vehicle owners across the country. Our specialty? European brands like BMW, Mercedes, Maserati, Ferrari, Aston Martin, Audi, Porsche, and Land Rover — but we also handle domestic vehicles, heavy equipment, and marine electronics. If it has a control module, we've probably fixed it.

What Makes Us Different

Speed. Most jobs ship back within 2-3 business days. Need it faster? Same-day rush service available.

Plug-and-Play. Every module we repair or program is ready to install — no dealer visit, no extra coding. Just plug it in and drive.

Real People. Text us right now and you'll get a reply from an actual human in minutes. No chatbots, no ticket systems, no "please hold."

Honest Expertise. We've invested years into research and reverse engineering. We don't promise miracles — but when others can't solve it, we often can.

Our Mission

Keep you out of the dealership. Save you time and money. Get your vehicle back on the road — fast, reliable, and backed by our 6+ month warranty. Whether you're a professional shop or a vehicle owner, we treat every job like it's our own car on the line.