ECU Guides 3 min read
Immo Off or Key Programming? How to Decide When the Car Won’t Recognise the Key
The immobilizer lamp flashes, the engine cranks or stops after a second — and the first question is always the same: immo off or key programming?…
ECU Guides
Practical guides on reading, recovering, cloning and modifying engine, gearbox and body control units: which file to use, how to read the label, how to write safely.
ECU Guides 2 min read
ECU Cloning vs Virgin File vs Immo Off: Which Method for a Replacement ECU?
When an engine ECU fails, a used unit is usually cheaper and faster than a new one. The problem is the immobilizer: the used ECU belongs…
ECU Guides 3 min read
Engine Cranks but Won’t Start After an ECU Swap: 10-Point Checklist Before You Blame the File
A car that cranks but won't start after an ECU swap is the most common support question we receive. Nine times out of ten the file…
ECU Guides 2 min read
Sirius 32 Immo Off: Renault Clio, Megane, Laguna, Scenic and Kangoo Petrol ECU Guide
The Siemens Sirius 32 (and its Sirius 32N / 34 variants) controls Renault petrol engines from 1998 to about 2006: Clio II 1.4 and 1.6 16v,…
ECU Guides 4 min read
DPF Off Explained: How It Works, Which Fault Codes It Removes and What to Check First
The diesel particulate filter is the component that generates more workshop visits than any other emission part on a modern diesel. Blocked filters, failed regenerations, differential…
ECU Guides 2 min read
Mercedes CRD3 ECU Files: OM651 C-Class, E-Class, Sprinter and Vito Original, Immo Off and Virgin
The Delphi CRD3 family controls the Mercedes OM651 2.1 CDI diesel used from 2008 in the C-Class W204/W205, E-Class W212, GLK, ML W166, Sprinter W906, Vito…
ECU Guides 2 min read
Delphi DCM3.5 Immo Off and Virgin: Peugeot, Citroen and Ford 1.6 HDi / TDCi Euro 5 ECU Guide
The Delphi DCM3.5 is the engine ECU of the 8-valve 1.6 HDi (DV6D / DV6DTED, 92 hp) Euro 5 engine fitted from 2010 to the Peugeot…
ECU Guides 2 min read
EDC17C84 Immo Off and Original File: Renault, Dacia and Nissan 1.5 dCi Euro 6 ECU Guide
The Bosch EDC17C84 is the Euro 6 engine ECU of the 1.5 dCi K9K engine from 2015 onward: Renault Clio IV, Captur, Megane IV, Kadjar, Kangoo,…
ECU Guides 2 min read
Ford SID206 and SID803A: Focus, C-Max, Mondeo and Transit TDCi ECU Files Explained
Ford's TDCi diesels of the 2004–2012 era use Siemens/Continental engine ECUs: the SID803A on the 1.6 TDCi (Fiesta, Fusion, Focus II, C-Max, Volvo C30/S40/V50 1.6 D)…
ECU Guides 2 min read
Bosch ME7.5 Immo Off: VW, Audi, Seat and Skoda 1.8T and 2.0 Petrol ECU Guide
The Bosch ME7.5 (and its close relatives ME7.5.10, ME7.5.20 and ME7.5.30) is the engine ECU of the VAG 1.8T, 2.0 8v and some 1.6 petrol engines…
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