Siemens EMS3132 Immo Off for Renault Clio II, Megane and Dacia Logan 1.4/1.6 8v

Dacia Logan 1.4 8v, red key light flashing fast, cranks and won’t fire. Fault memory in the injection ECU shows an immobiliser code (DF002 or similar on most versions) and the UCH has either gone quiet or has been replaced by a used one. The ECU on this car is a Siemens EMS3132, and the same unit sits in the Clio II phase 2, Megane 1.4/1.6 8v, Kangoo, Symbol/Thalia and the Dacia Solenza. It’s one of the simplest Renault ECUs to sort out with a file, provided you read the right memory.

Where the immobiliser data lives

On the EMS3132 the UCH code is stored in a small external serial EEPROM (95040 family on most boards, check yours) next to the main flash. The engine calibration is in the flash. This matters because an OBD flash tool alone won’t see the EEPROM, so an OBD read from KESS V2 or MPPS gives you the calibration but not the immo bytes. For immo off you need the EEPROM read, or you need the whole ECU on the bench.

Immo off, step by step

1. Confirm the diagnosis. Check UCH power and ground, the transponder ring on the lock barrel, and the immobiliser line between UCH and ECU. A snapped ring wire mimics a dead UCH.
2. Pull the ECU. It’s in the engine bay on the Logan and Clio, near the battery. Note the two 8200 numbers on the label, or the S110 software line if it has one.
3. Read the EEPROM. Clip or desolder the 95040 and read it with UPA, XProg or Orange5. In-circuit clip reading usually works on this board if the MCU is held in reset; if the read is unstable, lift the chip.
4. Read the flash as well if you can (bench with KTAG or FoxFlash, or OBD with KESS V2 or Galletto on K-line). Not strictly needed for immo off, but it gives you a full backup.
5. Send us the EEPROM dump. We return it with the immobiliser disabled. Write it back, refit, and the car should start with the UCH disconnected or dead.
6. Clear the fault memory with CLIP. If the key light still flashes, that’s the UCH complaining, and the engine will still run.

Dumps in the catalogue

• RENAULT CLIO EMS3132 8200326380 8200365849 IMMO OFF DUMP
• DACIA LOGAN EMS3132 8200326380 8200483739 IMMO OFF DUMP
• RENAULT MEGANE EMS3132 8200298162 8200298256 IMMO OFF DUMP
• DACIA SOLENZA EMS3132 8200298162 8200323857 DUMP
• RENAULT MEGANE EMS3132 S110140000 A 8200298162 8200298290 DUMP
• DACIA LOGAN EMS3132 8200598393 8200691207 DUMP

Notice how 8200326380 turns up on both a Clio and a Logan, and 8200298162 on a Megane and a Solenza. The hardware is shared; the second number is the software and that’s where they differ. Ordering by hardware number only is fine for immo off on your own dump, but if you’re replacing a corrupted ECU with a stock dump, match both.

Dead UCH cases

The UCH on these cars fails in a few ways: water in the footwell, a failed relay driver, or a used UCH that was coded to a different car. The Dacia UCH is cheaper than the Renault one but it’s still a coded part and it needs CLIP to be married to the ECU and the keys. If the customer isn’t paying for a UCH and a CLIP session, immo off in the engine ECU lets the car drive. Central locking, wipers and lights still go through the UCH, so a properly dead UCH will leave you with other problems that no engine file fixes.

What if the ECU itself is dead?

A used EMS3132 with matching hardware number, plus one of the dumps above, plus your own EEPROM (or an immo off EEPROM), gets the car going. Do check the software number against the engine variant, because a Clio 1.6 file in a Logan 1.4 will start the engine but run badly.

Files and the full list of numbers are on the EMS3132 page; there’s a wider immo off category and separate Dacia and Renault brand pages. Not sure whether you should be switching the immobiliser off at all? Read immo off explained first.