Bosch MG1CS003 Repair

Are you experiencing misfires in a 2015-2020 BMW vehicle? If it’s fitted with a Bosch MG1CS003 engine control module, then this may well be the cause of your issues. Thankfully, we remanufacture MG1CS003 ECUs in just 2-3 working days with an unlimited-mileage lifetime warranty included.

Shop Now – Bosch MG1CS003 Repair

You’ll find these commonly failing control units fitted to popular models like some sixth-generation 3 Series (2016-2019) and second-generation 1 Series (2015-2019) vehicles, as well as many others. When failure strikes, it’s very common for misfire DTCs to store – these codes can relate to any of the engine’s cylinders.

Thankfully though, we’re the experts at resolving these issues. We’ve been remanufacturing automotive control units like the MG1CS003 for many years, and our work defect rate is now as low as 0.49%.

Complete our test form today and we’ll arrange for your Bosch MG1CS003 to be collected free of charge. We’ll then analyse your ECU on our in-house-developed HIL testing rigs to determine whether it’s defective or not.

What is the Bosch MG1CS003?
The Bosch MG1CS003 is an engine control module fitted to various post-2014 petrol-powered BMW models of varying engine sizes and performance levels. It’s common for models carrying 2.0-litre B48 or 3.0-litre B58 engines to contain one of these ECUs, although configurations do vary. As hybrid models like the 2015-2018 330e utilise petrol combustion engines, you’ll also find some hybrid models equipped with a Bosch MG1CS003.

As you might know, in Bosch’s ECU naming conventions the 'M' in MG1CS003 represents Motronic, which is essentially a control module that combines fuel injection and ignition control. The 'G' stands for gasoline, meaning these ECUs are designed for use in petrol and hybrid petrol engines rather than diesel engines. The '1' denotes the generation of MG hardware this ECU belongs to. Both the 'C' (common rail) and 'S' (solenoid) relate to the fuel injection system used by the engine the ECU is responsible for managing. Finally, the '003' is the ECU’s specific model variant within the MG1CS family.

Although this control module allowed for more sophisticated management of the engine and provided compatibility with the very latest engine features and functionalities, the Bosch MG1CS003 is not without its faults.

Bosch MG1CS003 failure explained
Failure of these control units is surprisingly common, and it often occurs due to the inclusion of components that degrade sooner than you’d expect them to. As is the nature of an engine control unit, repeated power-up cycles and regular exposure to heat and vibration place these components under significant stress. Over time, this can cause the MG1CS003’s components to break down, resulting in the failure of the unit as a whole.

When this issue occurs, the ECU’s ability to deliver the correct electrical signals to the fuel injectors is often hindered. Subsequently, the operation of one or more injectors can be affected, which can cause their corresponding engine cylinders to misfire. As a result, owners typically experience a reduction in available engine power and they may uncover stored DTCs related to cylinder misfires like 140001 or 140301. In some cases, the vehicle may also be forced into limp mode until the Bosch MG1CS003 has been adequately repaired.

Bosch MG1CS003 failure: repair or replace?
Having diagnosed their misfiring BMW as being caused by a defective MG1CS003 control unit, many owners decide to purchase a brand-new one. However, this is rarely the most effective solution as like-for-like units come loaded with the very same unreliable internal components that failed initially.

Not only this, but you’ll have to recode any replacement ECU to your specific vehicle at additional time and expense. This is on top of the thousands of pounds it’ll cost to purchase a brand-new unit.

Thankfully, we’ve developed a much more cost-effective and longer-lasting solution for Bosch MG1CS003 failure.

Our solution
We propose having your Bosch MG1CS003 professionally tested and remanufactured. We’ve developed our own hardware-in-the-loop testing rigs in-house to be able to analyse these control modules under realistic operating conditions. This allows us to pinpoint the root cause of failure, identify any other areas of potential weakness, and ensure the unit is fully functional again after we’ve rebuilt it.

Unlike many other repair services, during our MG1CS003 remanufacturing process we include higher-than-OEM-standard components and strengthen any underperforming areas of the control module. This firstly ensures the root cause of failure is properly resolved, but it also helps to enhance the durability of your ECU to provide lasting functionality.

We do all of this in just 2-3 working days and you won’t need to recode the ECU back to your vehicle afterwards. Get started today by filling out our quick-and-easy test form.

Common failure symptoms:

• Misfires
• Loss of engine power
• Rough idle
• Engine warning light on
• Limp mode

Common fault codes:

• 140001 – Combustion misfires, several cylinders: Fuel injection is switched off
• 140010 – Combustion misfires detected, several cylinders
• 140301 – Combustion misfire, cylinder 3: Fuel injection is switched off
• 140310 – Combustion misfire detected, cylinder 3
• 21A02D – Combustion control, irregular idle

Test and rebuild:
We test these engine ECUs on custom-developed HIL testing rigs before and after the remanufacturing process. This allows us to locate hard-to-find faults and ensure the rebuild has been successful.
 
Programming:
You won’t need to have your rebuilt MG1CS003 recoded to your vehicle afterwards as we leave this information untouched throughout our process.
 
Quality:
We strive to provide a high-quality service and this is evidenced by our proud defect rate of just 0.49%.

Warranty:

Lifetime unlimited mileage*

How do I get my unit rebuilt?

To pay for the rebuild click the Shop Now link above, select your part number and click: Get yours rebuilt.

Print the payment/booking confirmation email.

Package the ECU inside a sturdy box with plenty of packaging material and 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 MG1CS003 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 these steps:

Fill in and submit this test form.

Print the booking confirmation email.

Package the control module inside a sturdy box with plenty of packaging material and 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 unit and call to inform you of the outcome of testing. If your ECU 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 control module and return it to you with an unlimited mileage warranty.

If you require further information regarding this Bosch MG1CS003 repair page then please contact us.