✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested to ensure it meets our quality standards. While it may show some cosmetic wear from previous use, it's fully functional and ready to install.
✓ Original Equipment: This is a genuine OEM (Original Equipment Manufacturer) part - the exact same part that came with your vehicle from the factory. It's designed specifically for your make and model, ensuring perfect fitment and performance.
✓ Works Like New: Despite some visual wear, this part will perform just as well as a brand new one. The internal components and functionality are intact, giving you the same reliability you'd expect from OEM quality.
✓ Significant Savings: Save 50-80% compared to buying new! Used OEM parts offer exceptional value - you get factory quality at a fraction of the cost. It's the smart choice for budget-conscious vehicle owners who won't compromise on quality.
✓ Risk-Free Purchase: We stand behind our used parts with a generous 6-month warranty, 30-day returns, and 100% money-back guarantee. If it doesn't work out for any reason, simply return it for a full refund. You have nothing to lose!
🛡️ 30-Day Returns + 6-Month Warranty - Buy with Confidence!
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Vehicle Fitment Guide
This part fits the following vehicles:
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BMW
Z42019-2024(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
sDrive20i M Sport
Convertible
2019 - 2020
L4 2.0L Turbo
RWD | Automatic | Fits 2.0L 4-cylinder engine only
sDrive20i Sport Line
Convertible
2019 - 2020
L4 2.0L Turbo
RWD | Automatic | Fits 2.0L 4-cylinder engine only
sDrive30i
Convertible
2019 - 2024
L4 2.0L Turbo
RWD | Automatic | Fits 2.0L 4-cylinder engine only
sDrive20i
Convertible
2021 - 2023
L4 2.0L Turbo
RWD | Automatic | Fits 2.0L 4-cylinder engine only
2022
⚠️ Important: Please verify your vehicle's year, make, model, and specifications before ordering. If you're unsure about fitment, contact our customer service team for assistance.
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Shipping & Handling
Standard shipping: 3-7 business days via UPS Ground
Parts are carefully packaged to prevent damage during transit
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
Defective parts: We will replace the part or issue a refund at our discretion
Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
Return shipping: We cover return shipping as part of our 100% money-back guarantee
Parts must be returned in original packaging and unmodified condition
Poorly packaged returns that arrive damaged will not be credited
6-Month Warranty
All used parts include a 6-month warranty from the date of purchase.
If your part fails within 6 months, we will send a replacement
Refunds are only issued if we cannot provide a suitable replacement
Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.
Damaged in Shipping?
If your part arrives damaged:
Stop immediately — do not install the part
Keep all original packaging and boxes
Take clear photos of the damage and packaging
Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Symptoms & Diagnosis
Warning signs the Engine Control Module (ECM) is failing:
Car won't start
Engine stalls or misfires
Check Engine light is on
Poor fuel economy
Transmission shifting problems
Car fails emissions test
How to test if this part is the problem vs other components:
Have a mechanic scan your car's computer for error codes.
Check wiring and connections to the ECM. Make sure they are clean and tight.
Test other sensors and components that the ECM controls. For example, check the fuel injectors and ignition coils.
Sometimes, a faulty sensor can cause the ECM to think there's a problem when there isn't.
Common failure causes for this part:
Water damage or corrosion
Overheating
Electrical surges or shorts
Vibration and wear over time
Buyer's Checklist
What to look for when buying this part:
Make sure the part is for your exact year, make, and model of car.
Check the seller's reputation and return policy.
Ask if the part has been tested.
Quality indicators for the available options:
For used parts, look for signs of damage or corrosion.
Ask about the part's history and mileage.
For new aftermarket parts, check the brand reputation.
What's typically included with the part:
Usually, just the ECM itself.
You may need to have the ECM programmed to your car. This is often not included.
Installation Overview
Difficulty level and estimated time:
Medium to difficult.
Estimated time: 1-3 hours.
Special tools needed (if any):
Socket set
Screwdrivers
Scan tool (for clearing codes and possibly programming)
Critical steps and tips:
Disconnect the car battery.
Locate the ECM (usually under the hood or dashboard).
Disconnect the wiring harness from the old ECM.
Remove the old ECM.
Install the new ECM.
Reconnect the wiring harness.
Reconnect the car battery.
Start the car and check for any error codes.
You may need to have the ECM programmed to your car by a mechanic.
Whether DIY is recommended or professional installation is better:
Professional installation is recommended, especially if programming is required.
Buying Options
Compare: Used OEM, New Aftermarket
Option
Pros
Cons
Used OEM
Genuine factory part, tested, lower price
May have higher mileage, limited warranty
New Aftermarket
Brand new, built to OE specs, longer warranty potentially
May not be exactly the same quality as OEM, can vary by manufacturer
Used OEM: Best value - genuine factory parts, tested and inspected, at significantly lower prices.
New Aftermarket: Brand new third-party parts built to OE specs.
Related Parts
Parts commonly replaced or checked at the same time:
Battery
Wiring harness
Sensors (e.g., oxygen sensors, mass airflow sensor)
Spark plugs
Why replacing related parts prevents repeat failures:
A bad battery or faulty wiring can damage the ECM.
Replacing worn sensors can prevent the ECM from getting incorrect information.
Typical Lifespan
How long this part normally lasts:
7-10 years or 100,000-150,000 miles.
Factors that affect longevity:
Extreme temperatures
Water damage
Electrical problems in the car
Quality of the part
Price Ranges
Budget vs mid-range vs premium options:
Used OEM: $150 - $400
New Aftermarket: $250 - $600
Labor cost considerations if applicable:
Labor to install: $100 - $300
Programming (if needed): $50 - $200
Total job cost estimates:
Used OEM + Install: $250 - $700
New Aftermarket + Install: $350 - $900
Vehicle-Specific Notes
Known issues for this vehicle's system related to this part:
Some models have problems with water leaking into the ECM compartment.
Check for recalls or Technical Service Bulletins (TSBs) related to the ECM. A TSB is a recommendation for repair from the vehicle manufacturer.
Some owners have reported issues with the ECM needing frequent reprogramming.
Any TSBs or common complaints:
Check online forums and databases for TSBs related to ECM issues for your specific model year.
Verification After Install
How to confirm proper operation:
Start the car and let it idle.
Check for any error codes using a scan tool.
Take the car for a test drive.
What to look/listen for to verify it's working correctly:
Smooth engine operation
Proper shifting
No check engine light
Normal fuel economy
FAQ
Q: Will this ECM work on my car if the numbers don't exactly match?
A: It's best to match the numbers exactly. Even if it looks like it will fit, there could be differences in the programming that cause problems.
Q: Do I need to program this ECM to my car?
A: Possibly. Some ECMs need to be programmed to match your car's VIN and options. Check with a mechanic.
Q: What happens if I install the ECM and it doesn't fix the problem?
A: The ECM may not be the problem. Have a mechanic diagnose the car to find the real cause.
Q: How do I know if the used ECM is good?
A: Ask the seller if it has been tested. Look for signs of damage or corrosion. A reputable seller will offer a warranty.
Q: Can I return the ECM if it doesn't work?
A: Check the seller's return policy before you buy. Make sure you can return it if it doesn't solve your problem.
