Flex vs KESS3: Reading Renault SID321 ECU

Renault Continental SID321 reading review:
MMS Flex failed to read SID321 via OBD VR. It says no Virtual read available for this software version on the server.

Cannot do it on bench when no vr on server.

Did it with Alientech KESS3.

Autotuner will also do this ECU. AT is the best in this ecu.

Alientech KESS3 Update GM ACDelco E84 ECM on Bench Mode

Alientech KESS3 developped bench protocol for AC Delco E84- GM compact platforms.

Expand your workshop operations with this new development providing direct ECU access — simplifying procedures on compact vehicles and improving workflow efficiency.

• Read and write on AC Delco E84 in BENCH mode
• Direct ECU access for faster and safer operations
• Optimized control on GM 1.0, 1.4 EcoTec and 1.8 Flex engines from 2016+

04.02.2026 — Upgrade 2.86

With the introduction of BENCH mode on the E84 control units — previously manageable only via OBD — you now have direct access to the ECU, simplifying workshop operations on compact vehicles widely distributed across the global market.

Designed for 1.0, 1.4 EcoTec and 1.8 Flex engines from 2016 onwards, this release concretely expands operational possibilities on urban and compact cars.

An update that improves operational safety and workflow continuity, reducing intervention times and increasing procedure reliability.

Technical focus

Connection: BENCH
ECU: AC Delco E84
Production years: from 2016
Brands involved: Chevrolet, Holden, Opel

Supported vehicles ECU

Chevrolet Beat, Onix, Prisma, Spark, Spin
Holden Spark
Opel Karl

Flex ECU Programmer Works on Honda EDC16C7

Tried to read and write Honda Accord Bosch EDC16C7 ECU with Magic Motorsport Flex ecu programmer.

Doing CONNECT shows no ID information.

But read and write went fine.

AutoTuner failed to ID it also. So no read process started. So FLEX failed or didn’t showed up an ID but carried out reading and writing.

This is just curiosity about the protocol acting like this.

Not worried at all, it would recover with any other of my tools in the box.

Always recommend Kess3 on these old ECUs.

 

Alientech KESS3 Adds Boot Protocol for GM E67

Problem: It’s a Seat taraco 2.0tdi 2023 model. Tried to read Bosch ECU MD1CS004 (HW80) with Autotuner. It doesn’t want to read it too high protection but I did a virtual read via obd I’m afraid to write it so it doesn’t crash.

Error:

Authentication error. This ECU has new protection and is not yet supported.

Solution:

ok with obd mode by Autotuner.

OBD is ok for this Version.

Virtual is always safe.
Obd read and write no problem.
Obd read and write safe and fast with charger battery.
There are some versions you can’t read it, locked version, 309 AA , M, T. If you want to do adblue off there is another solution.

AutoTuner Solution: VAG MD1CS004 Authentication Error

Alientech KESS3 released new Boot protocol for AC Delco E67- GM platforms.

Expand your workshop possibilities with the new BOOT protocol dedicated to AC Delco E67 ECUs. Designed to guarantee full ECU access even in the most complex configurations, now alongside OBD communication.

• Read and write on AC Delco E67 in BOOT mode
• Stable and reliable procedures on complex GM systems
• Full engine management control on GM vehicles from 2006+, from 2.4L to 6.2L engines

30.01.2026 — Upgrade 2.84

This development focuses on the many GM platforms from 2006 onwards, covering a wide range of engines from 2.4 to 6.2 liters.

Alongside the already available OBD communication, BOOT mode is now introduced, designed to ensure full access to the ECU even in the most complex configurations. An update that significantly expands operational possibilities on SUVs, sedans, and ultra high-performance vehicles in the American market, providing stable and reliable procedures on one of the most widespread ECU families within the GM group.

A concrete solution to effectively handle operations on vehicles that have historically been complex and highly valuable for workshops.

Technical focus

Connection: BOOT
ECU: AC Delco E67
Production years: from 2006
Brands involved: Buick, Cadillac, Chevrolet, GMC, Holden, Hummer, Isuzu, Pontiac, Saturn

Supported vehicles ECU

Buick Lacrosse, Lucerne, Rainier, Terraza, Verano
Cadillac CTS-V, DTS, XRS, STS, XLR
Chevrolet Camaro ZL1, Impala, Montecarlo, Trailblazer, Uplander
GMC Acadia, Envoy, Savana
Holden Commodore VE
Hummer H3
Isuzu Ascender GMT360, Ascender GMT370
Pontiac G6, G8, Grand Prix, Montana
Saturn Aura, Ion, Outlook, Relay, Sky, Vue