2012-2015 Evoque & LR2 Engine Control Module: A Guide to Failure, Programming, and Replacement
This guide covers the critical symptoms, mandatory programming, and replacement options for the Engine Control Module (ECM) in the 2012-2013 Range Rover Evoque and 2013-2015 Land Rover LR2.
- A replacement ECM (new or used) absolutely requires programming to the vehicle's VIN and immobilizer system; the car will not start without it.
- Dealers will typically only program a new ECM they supply. For a used module, you must find an independent Land Rover specialist or use a mail-in cloning service.
- Always match the OEM part number BJ32-12B684-MA exactly when buying a used module to ensure compatibility.
- Symptoms like a no-start condition, random stalling, or a sudden flood of unrelated error codes are strong indicators of ECM failure.
Symptoms of a Failing ECM
A faulty Engine Control Module can cause a wide range of issues, which can be intermittent and confusing. Because the ECM is central to the engine's operation, failure often leads to significant driving problems or a no-start condition.
- Check Engine Light: A persistent check engine light is the most common symptom. A failing ECM may also trigger a flood of seemingly unrelated fault codes all at once.
- Engine Won't Start: The vehicle may crank but fail to start. 🎬 Watch: Diagnosing a Land Rover LR2 no-start condition This happens because the ECM is not sending the correct signals to the fuel injectors or ignition coils.
- Engine Stalling or Misfiring: The engine may stall unexpectedly, run very rough, or have noticeable misfires. This can be caused by incorrect fuel or spark timing commands from the failing module.
- Poor Performance and Fuel Economy: A sudden, significant drop in gas mileage, sluggish acceleration, or a general loss of power can occur when the ECM can no longer manage the engine effectively.
- Immobilizer or Security Issues: The vehicle may not recognize a valid key, displaying a security fault and refusing to start. This happens because the ECM is a key part of the anti-theft system.
- Erratic Shifting: The ECM sends data to the Transmission Control Module (TCM). A bad ECM can send incorrect data, leading to hard, jerky, or improper gear shifts.
Known Issues, TSBs, and Recalls
While there are no major recalls for ECM failure on these vehicles, it's important not to confuse the ECM with other control units. A widely known recall (NHTSA #14V395000) for the 2012-2013 Evoque and 2010-2015 LR2 concerns the Occupant Classification System (OCS) ECU, which is part of the airbag system, not the engine computer.
Land Rover has issued several Technical Service Bulletins (TSBs) that involve reprogramming the ECM to fix specific software bugs. These bugs could cause the check engine light to illuminate with certain Diagnostic Trouble Codes (DTCs) without any actual hardware failure. Common codes addressed by these software updates include P0089-29, P00C6, P228D-00, and P008B. If your vehicle is showing these codes, a trip to a dealer or specialist for a software update may solve the problem without needing a new ECM.
Pro Tip: Before condemning the ECM, have a technician check if any software updates are available for your vehicle's VIN. Resolving a software glitch is much cheaper than replacing the entire module.
Diagnosing and Replacing the ECM
ECM Location
The ECM is located in the engine bay on both the Range Rover Evoque and the LR2, but the access procedure differs slightly.
- 2012-2013 Range Rover Evoque: The ECM is found at the rear of the engine compartment, in the plenum area under the windshield cowl panel, often housed in a black plastic carrier.
- 2013-2015 Land Rover LR2: The location is similar to the Evoque, in the plenum chamber. Access requires removing the plenum chamber cover panel. 🎬 See this video showing Range Rover Evoque module locations On some Land Rover models, this area is behind the battery.
Water intrusion can be a risk for electronics mounted in the plenum area. When replacing the ECM, inspect the housing and connectors for any signs of corrosion or water damage, which could indicate a leak from the windshield cowl or seals that must be fixed to protect the new module.
Warning: This Module Requires Programming. You cannot simply swap this part from another vehicle. The ECM is tied to your vehicle’s unique Vehicle Identification Number (VIN) and its immobilizer security system. The vehicle will not start until the replacement module is professionally programmed.
🎬 Watch: How to perform Range Rover Evoque ECU programmingProgramming Requirements
Programming a replacement ECM is a complex process that requires specialized tools and knowledge. You have three main options:
- Land Rover Dealership: A dealer can program a brand-new ECM to your vehicle. However, they are almost always unable or unwilling to program a used ECM purchased from another source.
- Independent Land Rover Specialist: Many independent shops that specialize in Jaguar and Land Rover have the necessary diagnostic tools (like JLR SDD, Autologic, or Pathfinder) and expertise to program a used ECM. You must confirm with the shop beforehand that they are willing and able to perform this service.
- ECM Cloning Service: This is often the most straightforward option when using a recycled part. You remove your original ECM and send it, along with the used replacement, to a specialized service. They will transfer the critical data—including the VIN, key codes, and immobilizer information—from your old module to the replacement. The returned module is then 'plug-and-play,' requiring no further programming.
Buying a Used Engine Control Module
Purchasing a used OEM ECM is a cost-effective solution, but careful verification is essential. Here’s what to look for:
- Match the Part Number Exactly: The most critical step is to match the OEM part number from your original module. The primary Land Rover part number is BJ32-12B684-MA. Other compatible numbers include LR028981, LR034444, LR044558, LR060416, and the Bosch number 0261S06504. Mismatched hardware may not be programmable to your vehicle.
- Inspect for Physical Damage: Carefully examine the used module's case and connectors. Look for any signs of corrosion, water marks, or physical damage. A module that has suffered from water intrusion is likely to fail.
- Find a Programmer First: Before you buy a used ECM, secure a plan for programming. Contact local independent Land Rover specialists or identify a mail-in cloning service and confirm they can work with your specific part number. A used ECM is useless without a way to program it.
Cost Comparison
The total cost of replacing the ECM involves the part itself and the mandatory programming. Prices can vary significantly based on the source of the part and labor rates.
| Item | Estimated Cost | Notes |
|---|---|---|
| New OEM ECM | $1,500 - $2,500+ | Part only, from a Land Rover dealership. |
| Used OEM ECM | $150 - $450 | Part only, from a salvage yard or online retailer. |
| Remanufactured / Cloned ECM | $500 - $900 | Includes the part and cloning service. |
| Shop Labor (Replacement) | $100 - $200 | Physical swap of the module (approx. 1 hour). |
| Shop Labor (Programming) | $400 - $1,200 | Specialist programming for a new or used module. |
Frequently Asked Questions (FAQ)
Can I replace the ECM myself?
You can physically swap the module yourself to save on labor, as it is generally accessible in the engine bay. However, the vehicle will be completely immobilized and will not start until the replacement ECM is professionally programmed. For a true DIY approach, you would need to remove your old ECM, send it out with a replacement for a cloning service, and then reinstall the cloned module.
Will a used ECM from the exact same year and model work without programming?
No. The ECM is coded to the original vehicle's VIN and security system. Even if the donor vehicle is identical, the module must be reprogrammed to match your car's immobilizer and keys.
My mechanic says I need a new ECM, but the car still drives. Should I replace it?
If the vehicle is exhibiting critical symptoms like stalling, it is unsafe to drive. If the only symptom is a check engine light, it's possible the issue is a software glitch that can be fixed with an update, or a less critical internal fault. However, ECM problems rarely fix themselves and typically worsen over time, eventually leading to a no-start condition or a dangerous stalling event.
What is the difference between an ECM, ECU, and PCM?
The terms are often used interchangeably. ECU (Engine Control Unit) is a generic term for any electronic controller. ECM (Engine Control Module) specifically controls the engine. PCM (Powertrain Control Module) is a more advanced controller that manages both the engine and the transmission. For these vehicles, the part is most commonly referred to as the ECM.
Helpful Videos
Technical Specifications
OEM Part Numbers: BJ32-12B684-MA BJ3212B684MA LR028981 LR034444 LR044558 LR060416 0261S06504
Bosch Engine Control Module
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Land Rover Range Rover Evoque:
- Land Rover LR2: