The world's first Lotus Emira I4 ECU

GasperV · Saturday at 12:30 PM

This is from FB:

Kaz · Saturday at 12:32 PM

So awesome...really looking forward to rapid development now! pops, bangs, burbles, cat related CEL now a thing of the past - hope we can do adjustable maps somehow like other platforms

GasperV · Saturday at 12:45 PM

@675430VME do you have more information gerading this news?

Wusah · Saturday at 1:37 PM

This is exciting news, hope more mods come out for the i4 so prices will drop.

675430VME · 2025-09-07T01:20:26-0500

Kaz said:
So awesome...really looking forward to rapid development now! pops, bangs, burbles, cat related CEL now a thing of the past - hope we can do adjustable maps somehow like other platforms

How about this?

675430VME · 2025-09-07T01:21:33-0500

GasperV said:
@675430VME do you have more information gerading this news?

I am getting mine done next week and will post up info.

Wusah · 2025-09-07T07:26:48-0500

675430VME said:
How about this?

View attachment 70162

Shut up and take my money!

Milk242 · 2025-09-07T12:46:59-0500

This is going to be awesome but I think for now it’s only available as a bench flash which means sending your ecu to China so without a drivable car for a bit. Now in the US and their hostility towards imports, who knows if US customs would hold it up even longer when receiving it back lol

Emira Fan · 2025-09-07T12:58:40-0500

Wonder if Lotus will actually sell new ECUs to customers, then we could do a straight swap.

675430VME · 2025-09-07T13:06:09-0500

Emira Fan said:
Wonder if Lotus will actually sell new ECUs to customers, then we could do a straight swap.

They do, but they are locked, so what for?

Emira Fan · 2025-09-07T13:30:12-0500

675430VME said:
They do, but they are locked, so what for?

[’s only available as a bench flash which means sending your ecu to China so without a drivable car for a bit. Now in the US and their hostility towards imports, who knows if US customs would hold it up even longer when receiving it back lol]

We could just purchase an 'second ECU' and send that one out to be modified vs having a useless car until the ECU has returned.

dbjames · 2025-09-07T16:11:27-0500

You can buy an ECU from a salvage auction or eBay - but I think it needs to be cloned to yours to work (I guess this requires unlocking) - so (I think) you'd still need to send your original ECU with the duplicate to China... I guess the advantage here is you'd have your original (untuned) ECU to swap back if needs be

TurboTambo · 2025-09-07T18:07:43-0500

675430VME said:
How about this?

View attachment 70162

Now this is an ECU thing, we should see the exact same bhp from the 360hp cars.

1031ent · 2025-09-08T02:22:02-0500

Has anyone checked if your vin is in the ECU? I ask because I see the vin in the infotainment screen.

dotjdk · 2025-09-08T08:19:02-0500

I just dropped mine off for bench tuning today here in Dubai. Staying a bit more on the conservative side though. At least at first. Tuning to the 420’ish horsepower the engine comes with in AMGs

docron · 2025-09-08T08:23:42-0500

Emira Fan said:
Wonder if Lotus will actually sell new ECUs to customers, then we could do a straight swap.

i already priced out a spare ECU from my Part Dept manager and it wasnt as bad as I thought it would be. $1308.19 OTD, she said she can get it in 2-3 days if needed.

NJemira85 · 2025-09-08T08:28:00-0500

dotjdk said:
I just dropped mine off for bench tuning today here in Dubai. Staying a bit more on the conservative side though. At least at first. Tuning to the 420’ish horsepower the engine comes with in AMGs

They reliably make big power in Benz applications. Its fully built motor.

My concern would be Dubai temps and airflow.

I don’t blame the car. My performance suffers greatly with ambients like that

dotjdk · 2025-09-08T08:31:45-0500

NJemira85 said:
They reliably make big power in Benz applications. Its fully built motor.

My concern would be Dubai temps and airflow.

I don’t blame the car. My performance suffers greatly with ambients like that

Yes, 470 hp and 600+ Nm should be no problem, but I’d probably need some cooling upgrades to get that consistently here. Starting off slow, we can always take a step up later.

Going from 360 to 420-430 is a good first step for me

Emira Fan · 2025-09-08T08:46:14-0500

docron said:
spare ECU from my Part Dept manager and it wasnt as bad as I thought it would be. $1308.19 OTD, she said she can get it in 2-3 days if needed.

Wow, in my mind I was expecting $3-4k. Really makes this viable option for most people.