Vauxhall Astra, Zafira, Meriva ECU fault (MT35E)

Vauxhall MT35E engine ECU fault

This ECU is a very common failure for Vauxhall Astra, Zafira, Meriva 1.6 litre built between 2005 – 2013 with the following engine codes: Z16XEP, Z16XER & Z16XE1.


ECU system type:


MT35E 2.1

MT35E 2.3

The most common fault symptom resulting from failure of this ECU is that the engine will cut out and fail to restart once the engine has reached operating temperature or after prolonged driving. If you have your vehicle diagnosed, then you may also get fault codes stored within the ECU.


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Common Failure symptoms:

  • Cutting out
  • No start


Common fault codes:

  • P1600 – Replace Electronic Control Unit

(You may also get fault codes for engine misfire or injector/coil faults)


Affected Vehicles:

  • Vauxhall Astra H (5th generation) 2004 – 2013
  • Vauxhall Meriva 2003 – 2013
  • Vauxhall Zafira B (2nd generation) 2005 - 2013


Common failing part numbers:

(If you would like to purchase a replacement ECU or rebuild of your own ECU then please select your model & part number above, if you do not see your part number then please browse our product catalogue).


Technical update 21/11/2014:

If you have all or most of the following fault codes stored, then the body control module (on left side of engine compartment) should be checked for water damage by removing from its connection cradle and check for connection problems underneath and also the ignition coil should be checked/replaced. Only after this has been checked should the engine ECU be considered as a possible cause of these fault codes.


  • P0201- Injector circuit 1
  • P0202- Injector circuit 2
  • P0203- Injector circuit 3
  • P0204- Injector circuit 4
  • P1600- Replace electronic control module
  • U2103- CAN BUS circuit malfunction no communication with can bus
  • U2104- CAN BUS reset counter overrun
  • U2108- Anti lock brake system no communication with CAN BUS
  • U2139- CAN BUS no communication with steering column module


Test and rebuild:

Each Vauxhall engine ECU is comprehensively tested on our Hardware-In-the-Loop test rigs both before and after the rebuild to ensure that the rebuilt unit will meet, even exceed, manufacturer specifications. Using only higher rated versions of OEM components every rebuilt ECU will outlast the vehicle it is fitted back onto.



During test and rebuild all coding is retained meaning that when you get the ECU back its just a case of plug and play.



Our strict quality control: encompassing testing, components and workmanship will ensure only the highest level of work is carried out to meet our lifetime warranty standards.



Lifetime unlimited mileage*


How do I get my unit rebuilt?

To pay for the rebuild select your part number/model and click: Get yours rebuilt

Print the payment/booking confirmation email.

Package the Vauxhall engine ECU inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box).

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received we will test, rebuild and return your engine ECU with an unlimited mileage lifetime warranty. (if your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping)


What if I don’t want to pay up front?

This is not a problem, if you prefer this option then follow the following steps:

Fill in and submit this test form.

Print the booking confirmation email.

Package the Vauxhall engine ECU inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box).

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received, we will test your Vauxhall engine ECU and call you to advise on the outcome of testing, if your unit is faulty and you choose to go ahead with the rebuild then we will take payment over the phone using a debit/credit card.

We will then rebuild your engine ECU and return it to you with an unlimited mileage warranty.

If you require further information regarding this Vauxhall engine ECU, then please contact us.

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Comments on "Vauxhall Astra, Zafira, Meriva ECU fault (MT35E)"
Steve knight says: 09/02/2024 17:29:08
After the engine runs for 20mins approx it cuts out the engine and doesnt start again until its called down, been in to snows in Basingstoke who failed the cars MOT and advised that ECU problem
ECU Admin says: 12/02/2024 10:13:54
Hi Steve, we can certainly look into that for you. To get your unit to us for test and rebuild just click Shop Now above, or complete our online Test Form
Craig says: 16/12/2019 21:35:22
Hi iv a 1.6 zafira b theres no signal going from my throttle to my throttle body had someone look at it and they said that the ecu is fried how much to get a rebuild one
ECU Admin says: 17/12/2019 09:38:16
Hi Craig, we can help with that. For prices and shipping information please select your part number from the following list:
Carl Williams says: 01/09/2019 13:43:32
Hi I have a vauxhall zafira 1.7 diesel can you quote me to repair the ecu unit
ECU Admin says: 02/09/2019 09:43:36
Hi Carl, of course. For prices and shipping information simply search your part number in the Search box at the top of the page, or find your part number from the following list:
Naomi Dempsey says: 02/08/2019 17:43:15
Hi My Astra H 1.6 twinport is cutting out and the garage have replaced other items. How much will it cost to rebuild the ECU including any reprogramming necessary
ECU Admin says: 05/08/2019 10:10:45
Hi Naomi, we can certainly offer to test your ECU with a view to rebuild if required, no programming will be required as we retain all coding information. Simply select your part number above for prices, or see the following list:
Karen says: 01/08/2019 22:09:49
My car started to cut out and been advised it is the ECU not sure on code.. he has taken a cable to main battery.. is this safe
ECU Admin says: 02/08/2019 09:43:04
Hi Karen, thank you for your comment. As our video it is an issue that can be misdiagnosed so it is very important that full diagnostics are carried out on the vehicle. If you are able to give us a call, we can talk you through your options:
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