This is a used part. It is the Chassis Control Module (computer) for the transmission (TRANS ECU). It is designed for vehicles with a 3.0L engine.
Requires professional programming to your vehicle. Fits 3.0L engines with automatic transmission. Match your original part number exactly.
Original Part #(s): 24607518709, 24607526460, 24607528448, 24607532340, 7518709
Condition: Excellent (A)
Like new, minimal to no wear
78,742 miles
Odometer reading when part was removed
SKU #
660326-A89335-195
Why Buy Used OEM Parts?
✓ 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
Z42003-2005(tapclick to expand)(tapclick to hide)
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SubmodelSUB- MODEL
Body Style
Years
Engine
Attributes
3.0i
Convertible
2003 - 2005
L6 3.0L
RWD | Automatic & Manual | 3.0L engine only
2004
⚠️ 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 of a Failing Transmission Control Module (TCM)
Erratic or harsh shifting
Getting stuck in one gear
Transmission slipping
Difficulty shifting into gear
Check engine light is on
Car won't shift at all
Poor fuel economy
How to Test the TCM
Get your car scanned by a mechanic. They can read the error codes stored in your car's computer. These codes can point to a problem with the TCM.
Check the wiring and connections to the TCM. Make sure they are clean and tight.
A mechanic can use a special tool to monitor the TCM's signals while the car is running. This can help them see if the TCM is sending the right commands.
Sometimes, the problem is not the TCM itself, but a faulty sensor or other part of the transmission. A mechanic can test these other parts to rule them out.
Common Causes of TCM Failure
Overheating
Water damage
Electrical surges
Vibration
Age and wear
Buyer's Checklist
What to Look For When Buying a TCM
Make sure the part is compatible with your car's year, make, and model.
Check the part's condition. If buying a used part, look for signs of damage or wear.
Ask about the seller's return policy.
Quality Indicators
Feature
Used OEM
New Aftermarket
Origin
Original equipment from the manufacturer
Made by a third-party company
Testing
Typically tested and inspected
New, but may not have been individually tested
Reliability
Known reliability of the original part
Reliability can vary by manufacturer
Price
Generally less expensive than new aftermarket
Can be more expensive than used OEM
What's Included
The TCM itself
Sometimes, mounting hardware is included.
Check with the seller to confirm what is included.
Installation Overview
Difficulty Level and Estimated Time
Difficulty: Medium
Estimated Time: 1-3 hours
Special Tools Needed
Socket set
Screwdrivers
Scan tool (to clear error codes)
Critical Steps and Tips
Disconnect the negative battery cable.
Locate the TCM. It is usually under the dashboard or under a seat.
Disconnect the wiring harness from the TCM.
Remove the TCM from its mounting bracket.
Install the new TCM.
Reconnect the wiring harness.
Reconnect the negative battery cable.
Use a scan tool to clear any error codes.
DIY or Professional Installation?
DIY is possible if you have experience working on cars.
Professional installation is recommended if you are not comfortable working on cars.
Buying Options
Compare: Used OEM, New Aftermarket
Feature
Used OEM
New Aftermarket
Pros
- Genuine factory part - Tested and inspected - Lower price than new - Known reliability
- Brand new - Readily available
Cons
- May have some wear and tear - Limited availability
- Reliability can vary - May not be as durable as OEM
Recommendation
A great choice for budget-conscious buyers who want a reliable part.
A good choice if you prefer a brand-new part and don't mind paying a bit more.
Used OEM
Best value for your money.
Genuine factory parts.
Tested and inspected to ensure they are working properly.
Significantly lower prices than new parts.
New Aftermarket
Brand new parts made by third-party companies.
Built to meet or exceed OE specifications.
Can be a good alternative to OEM parts.
Related Parts
Parts Commonly Replaced or Checked
Transmission fluid and filter
Transmission sensors (speed sensors, temperature sensors)
Wiring harness
Why Replace Related Parts?
Replacing related parts can help prevent repeat failures.
Old transmission fluid can damage the TCM.
Faulty sensors can send incorrect signals to the TCM.
Damaged wiring can cause the TCM to malfunction.
Typical Lifespan
How Long Does a TCM Last?
A TCM can last for 100,000 miles or more.
Factors Affecting Longevity
Driving habits
Maintenance
Environmental conditions
Price Ranges
Budget vs Mid-Range vs Premium
Used OEM: $150 - $300
New Aftermarket: $250 - $500
Labor Cost: $100 - $300
Total Job Cost: $250 - $800
Vehicle-Specific Notes
Known Issues
Some models are known to have issues with the TCM due to heat.
Check for any Technical Service Bulletins (TSBs) related to the TCM on your specific model.
Verification After Install
How to Confirm Proper Operation
Check for smooth and accurate shifting.
Make sure the check engine light is off.
Test drive the car to see if it shifts properly in all gears.
What to Look/Listen For
No unusual noises from the transmission.
Smooth acceleration.
No slipping or hesitation when shifting.
FAQ
Q: Will this TCM need to be programmed? A: Some TCMs may need to be programmed to your specific vehicle. Check with a mechanic or the seller to confirm.
Q: How do I know if the TCM is really the problem? A: Have a mechanic diagnose the problem. They can use a scan tool to read error codes and test the TCM.
Q: What if the TCM I receive is defective? A: Check the seller's return policy before you buy.
Q: Can I replace the TCM myself? A: Yes, if you have experience working on cars. Otherwise, it is best to have a professional install it.
Q: How do I find the TCM in my car? A: The TCM is usually located under the dashboard or under a seat. Consult your car's repair manual for the exact location.
