This photo shows the same type of part you'll receive. Since each used part has its own wear and scratches, yours may look slightly different. Check the product notes for details about the condition of this specific part.
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2003 - 2008 BMW Z4 Telematics Control Module (OEM)
This is a used part. This control unit helps manage communication and tracking (Telematics). It is also used for voice input. This part mounts in the trunk.
This module controls phone and voice features. It is located in the trunk. Match your old part number exactly before buying.
Original Part #(s): 84416922639, 84416931986, 84416941973, 84416960802
Condition: Excellent (A)
Like new, minimal to no wear
160,000 miles
Odometer reading when part was removed
SKU #
3800881-12335-195
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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⚠️ 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 Telematics Control Module
Loss of communication with the vehicle's computer
SOS or Assist button malfunctions
Navigation system errors
Bluetooth connectivity problems
Remote unlocking or starting issues
Battery drain
Testing the Telematics Control Module
Check the vehicle's battery voltage and charging system.
Inspect the wiring and connectors for damage or corrosion.
Use a diagnostic scan tool to check for trouble codes related to the telematics system.
If possible, swap with a known good module to see if the problem is resolved.
Common Causes of Failure
Water damage or corrosion
Electrical surges or shorts
Physical damage from accidents
Software glitches or corruption
Age and normal wear and tear
Buyer's Checklist
What to Look For When Buying
Check the module's physical condition for any signs of damage.
Verify the module is compatible with your vehicle's year and model.
Confirm the seller offers a warranty or return policy.
Quality Indicators
| Feature | Used OEM What's Typically Included
The Telematics Control Module itself.
Sometimes mounting hardware.
Installation Overview
Difficulty Level and Estimated Time
Difficulty: Medium
Estimated Time: 1-2 hours
Special Tools Needed
Socket set
Screwdrivers
Diagnostic scan tool (recommended)
Critical Steps and Tips
Disconnect the negative battery cable before starting.
Locate the Telematics Control Module (usually in the trunk or under a seat).
Disconnect the wiring harness connectors.
Remove the old module and install the new one.
Reconnect the wiring harness connectors.
Reconnect the negative battery cable.
Use a diagnostic scan tool to clear any trouble codes and program the new module if necessary.
DIY or Professional Installation?
DIY is possible for mechanically inclined individuals.
Professional installation is recommended if you're not comfortable working with electrical systems or programming.
Buying Options
Compare: Used OEM, New Aftermarket
| Feature | Used OEM 0002-2008 BMW OEM Telematics Control Module - Hollander #591-53321
Symptoms & Diagnosis
Warning Signs the Telematics Control Module is Failing
SOS button not working
Navigation system malfunctions
Bluetooth connection problems
Vehicle not responding to remote commands (unlocking, starting)
"Assist" light illuminated on the dashboard
Dead battery (due to the module draining power)
How to Test if This Part is the Problem
Check the vehicle's battery voltage. A weak battery can cause communication issues.
Inspect the wiring harness and connectors for corrosion or damage.
Use a BMW-specific diagnostic scan tool to read fault codes from the Telematics Control Module (TCM). Common codes relate to communication errors or module failure.
Try resetting the TCM using the diagnostic tool.
If possible, test the system's functionality (SOS, navigation) after clearing codes. If the problems persist, the TCM is likely faulty.
Common Failure Causes
Water intrusion (leaks in the trunk or sunroof area)
Electrical surges or shorts
Age-related component degradation
Software corruption
Buyer's Checklist
What to Look For When Buying
Ensure the part is from a reputable seller.
Check if the part has been tested and inspected.
Verify the seller offers a warranty or return policy.
Confirm the part matches the year range of your vehicle (2002-2008).
Quality Indicators
For used OEM parts, look for minimal signs of wear and tear.
Ask if the part has been tested for functionality.
Check for any visible damage to the connectors or housing.
What's Typically Included with the Part
The Telematics Control Module itself.
Sometimes the mounting bracket (but not always).
Installation Overview
Difficulty Level and Estimated Time
Difficulty: Medium
Estimated Time: 1-2 hours
Special Tools Needed
Socket set
Screwdrivers
Diagnostic scan tool (required for coding/programming)
Critical Steps and Tips
Disconnect the negative battery cable.
Locate the TCM (usually in the trunk, behind a panel).
Disconnect the wiring harnesses.
Remove the old TCM.
Install the new TCM.
Reconnect the wiring harnesses.
Reconnect the negative battery cable.
Use a BMW-compatible diagnostic scan tool to code/program the new TCM to your vehicle. This step is crucial for proper operation.
DIY or Professional Installation?
DIY is possible if you have experience with automotive electrical systems and diagnostic tools.
Professional installation is highly recommended due to the need for coding/programming.
Buying Options
Compare: Used OEM, New Aftermarket
| Feature | Used OEM and so on.
Related Parts
Battery: A weak battery can cause issues with the telematics system.
Antenna: If the antenna is damaged, it can affect signal strength and communication.
Wiring Harness: Damaged or corroded wiring can cause intermittent problems.
Why replace related parts prevents repeat failures: Replacing these parts ensures that the entire system is functioning properly and reduces the risk of future issues.
Typical Lifespan
Typical Lifespan: 7-10 years
Factors that affect longevity:
Exposure to moisture
Extreme temperatures
Electrical surges
Price Ranges
Used OEM: $50 - $150
New Aftermarket: $100 - $300
Labor cost considerations: $100 - $300 (if professional installation is required)
Total job cost estimates: $150 - $600
Vehicle-Specific Notes
Known issues: Some models may experience increased battery drain due to a faulty TCM.
TSBs: Check for any Technical Service Bulletins related to telematics system issues
