Mercedes A-Class Engine Control Unit A2661531491 | ECU A0034466040 / 5WK90990 OEM
The Mercedes-Benz Engine Control Unit A2661531491, also referenced as A0034466040 and 5WK90990, is a genuine OEM ECU designed for select Mercedes-Benz A-Class vehicles equipped with petrol engines.
The ECU (Engine Control Unit) serves as the vehicle's primary engine management computer, controlling fuel injection, ignition timing, throttle response, emissions systems, and communication with various sensors and modules throughout the vehicle.
Manufactured to Mercedes-Benz factory specifications, this OEM unit ensures optimal engine performance, fuel economy, and long-term reliability.
Product Specifications
| Specification | Details |
|---|---|
| Part Number | A2661531491 |
| Alternate Part Number | A0034466040 |
| Manufacturer Number | 5WK90990 |
| Vehicle Brand | Mercedes-Benz |
| Vehicle Series | A-Class |
| Module Type | Engine Control Unit (ECU) |
| Fuel Type | Petrol |
| Condition | Genuine OEM Used Unit |
| Testing Status | Fully Tested |
| Warranty | 30 Days |
| Shipping | Worldwide Available |
Compatibility Table
| Make | Model | Chassis | Engine | Year Range |
|---|---|---|---|---|
| Mercedes-Benz | A150 | W169 | Petrol | 2004-2012* |
| Mercedes-Benz | A170 | W169 | Petrol | 2004-2012* |
| Mercedes-Benz | A180 | W169 | Petrol | 2004-2012* |
| Mercedes-Benz | A200 | W169 | Petrol | 2004-2012* |
*Compatibility may vary based on VIN, engine specification, transmission type, and software version. Always verify part numbers A2661531491, A0034466040, and 5WK90990 before ordering.
What Does the Engine Control Unit Do?
The ECU controls and monitors numerous engine functions, including:
- Fuel injection timing
- Ignition timing
- Air-fuel mixture calculations
- Electronic throttle control
- Engine idle speed
- Emissions management
- Sensor communication
- Engine diagnostics
- Performance optimization
A properly functioning ECU is essential for maintaining engine efficiency and overall vehicle reliability.
Common Symptoms of a Faulty ECU
If your ECU is failing, you may notice:
- Check Engine Light illuminated
- Engine cranking but not starting
- Rough idle or stalling
- Poor fuel economy
- Engine misfires
- Loss of power
- Throttle response issues
- Communication faults during diagnostics
- Intermittent starting problems
Replacing a defective ECU with a genuine OEM unit can help restore normal engine operation.
Why Buy from Automan Spare Parts?
Automan Spare Parts specializes in genuine OEM automotive electronics and control modules.
Benefits of Buying From Us
- Genuine OEM Mercedes-Benz Parts
- Fully Tested Before Dispatch
- Worldwide Shipping Available
- Competitive Pricing
- Expert Technical Support
- Secure Packaging
- Fast Order Processing
- 30-Day Warranty
We supply a wide range of automotive electronics including ECUs, TCMs, BCMs, ABS modules, navigation systems, suspension modules, and comfort control units.
Installation & Programming Information
Before installation, please note:
- ECU programming may be required
- Immobilizer synchronization may be necessary
- VIN matching may be required
- Key coding may be needed
- Professional installation is recommended
Our team can also assist with ECU cloning, programming, and module synchronization services.
Order Mercedes A-Class ECU A2661531491 Today
Restore your vehicle's performance with a Genuine OEM Mercedes-Benz A-Class Engine Control Unit A2661531491 / A0034466040 / 5WK90990 from Automan Spare Parts.
Contact our team with your VIN number or a photo of your existing ECU to confirm compatibility before purchase.
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