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Body Control Module
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2019 - 2021 BMW Z4 Communication Control Module (OEM)

Only 1 left in stock
$179.95

ℹ️ Product Notes

This is a used part. This is a communication control module (COMM ECU). It controls your car's phone and telematics features. It does not work if your vehicle has a WiFi hotspot. Important: This module may need to be reprogrammed by a mechanic to work correctly in your vehicle.

Requires professional programming to work. Does not fit vehicles with the WiFi hotspot option. Match your old part number exactly.

Original Part #(s): 84, 84105A0FC23, 84106836765, 84106841002, 84106844147, 84109380157, 84109380160
Condition: Excellent (A)
Like new, minimal to no wear
82,018 miles
Odometer reading when part was removed
SKU #
9908245-77767-195

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:

BMW
Z4 2019-2021 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
M40i Convertible 2019 - 2021 L6 3.0L Turbo RWD | Automatic
sDrive20i M Sport Convertible 2019 - 2020 L4 2.0L Turbo RWD | Automatic
sDrive20i Sport Line Convertible 2019 - 2020 L4 2.0L Turbo RWD | Automatic
sDrive30i Convertible 2019 - 2021 L4 2.0L Turbo RWD | Automatic
M40i First Edition Convertible 2020 - 2021 L6 3.0L Turbo RWD | Automatic
sDrive M40i Convertible 2020 - 2021 L6 3.0L Turbo RWD | Automatic
sDrive20i Convertible 2021 L4 2.0L Turbo RWD | Automatic

⚠️ 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.

Policies

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 Communication Control Module:

  • Intermittent or complete loss of communication with other vehicle systems
  • Warning lights on the dashboard related to various systems (e.g., ABS, stability control, transmission)
  • Error messages displayed on the infotainment screen
  • Difficulty starting the vehicle
  • Unusual electrical behavior, such as lights flickering or accessories malfunctioning

Testing the Communication Control Module:

  1. Visual Inspection: Check the module and its connectors for any signs of physical damage, corrosion, or loose connections.
  2. Diagnostic Scan: Use a professional-grade scan tool to read diagnostic trouble codes (DTCs) from the vehicle's computer. This will help identify if the communication control module is reporting any errors.
  3. Module-Specific Tests: Some scan tools offer specific tests for the communication control module, such as checking its voltage supply, ground connections, and communication signals.
  4. Component Isolation: If multiple systems are affected, try disconnecting other modules one at a time to see if the communication issues resolve. This can help isolate the problem to the communication control module.
  5. Professional Diagnosis: If you're unsure, take your vehicle to a qualified mechanic for a professional diagnosis. They have the tools and expertise to accurately diagnose communication problems.

Common Failure Causes:

  • Water damage or corrosion
  • Electrical surges or voltage spikes
  • Physical damage from accidents or impacts
  • Overheating
  • Software glitches or corruption
  • Age and normal wear and tear

Buyer's Checklist

What to Look For When Buying:

  • Compatibility: Ensure the part is designed for your specific year and model.
  • Condition: If buying used, carefully inspect the part for any signs of damage or wear.
  • Warranty: Check if the part comes with a warranty.
  • Seller Reputation: Buy from a reputable seller with positive reviews.

Quality Indicators:

FeatureUsed OEMNew Aftermarket
OriginOriginal equipment manufacturer (OEM) partThird-party manufacturer
TestingTypically tested and inspectedShould be built to OE specifications, but testing may vary
WearMay show signs of normal wearBrand new, no wear
PriceGenerally more affordableVaries depending on brand and quality
ReliabilityDesigned and manufactured to meet the vehicle's original specificationsReliability can vary depending on the manufacturer; look for reputable brands

What's Typically Included:

  • The communication control module itself
  • Sometimes mounting hardware (check with the seller)
  • Installation instructions may or may not be included

Installation Overview

Difficulty Level and Estimated Time:

  • Difficulty: Medium
  • Estimated Time: 1-2 hours

Special Tools Needed:

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • Scan tool for clearing codes and potentially programming the new module
  • Multimeter (optional, for testing voltage and continuity)

Critical Steps and Tips:

  1. Disconnect the battery: Before starting any electrical work, disconnect the negative battery cable to prevent electrical shock or damage.
  2. Locate the module: The communication control module is typically located under the dashboard, behind the glove box, or in the center console. Consult your vehicle's repair manual for the exact location.
  3. Remove the old module: Disconnect the electrical connectors and any mounting hardware securing the old module.
  4. Install the new module: Connect the electrical connectors and secure the new module with the mounting hardware.
  5. Reconnect the battery: Reconnect the negative battery cable.
  6. Clear codes: Use a scan tool to clear any diagnostic trouble codes (DTCs) that may have been set during the installation process.
  7. Programming: Some modules may require programming or coding to be properly integrated with the vehicle's systems. This may require specialized equipment and knowledge.

DIY vs. Professional Installation:

  • DIY: If you have experience with automotive electrical systems and are comfortable using a scan tool, you may be able to install the communication control module yourself.
  • Professional Installation: If you're not comfortable working on electrical systems or don't have the necessary tools, it's best to have a qualified mechanic install the module. Programming may require a professional.

Buying Options

Used OEM:

  • Pros: Genuine factory part, typically tested and inspected, best value.
  • Cons: May have some wear and tear.

New Aftermarket:

  • Pros: Brand new, built to OE specifications.
  • Cons: Quality can vary depending on the manufacturer.

Typical Lifespan

How Long This Part Normally Lasts:

  • 7-10 years or more under normal conditions.

Factors That Affect Longevity:

  • Exposure to moisture or extreme temperatures
  • Electrical surges or voltage spikes
  • Physical damage
  • Quality of the original part

Price Ranges

Budget vs. Mid-Range vs. Premium Options:

OptionPrice Range (USD)Labor Cost (USD)Total Job Cost (USD)
Used OEM$150 - $300$100 - $200$250 - $500
New Aftermarket$250 - $500$100 - $200$350 - $700

Labor Cost Considerations:

  • Labor costs can vary depending on the mechanic's hourly rate and the complexity of the installation.
  • Programming the new module may add to the labor cost.

Vehicle-Specific Notes

Known Issues:

  • Some vehicles have known issues with water intrusion affecting the communication control module. Check for leaks around the windshield, sunroof, or door seals.
  • Software updates are sometimes available to address communication issues.

TSBs or Common Complaints:

  • Check for any Technical Service Bulletins (TSBs) related to communication problems on your vehicle.

Verification After Install

How to Confirm Proper Operation:

  • Check for warning lights: Make sure there are no warning lights on the dashboard related to the systems controlled by the communication control module.
  • Scan for codes: Use a scan tool to check for any new diagnostic trouble codes (DTCs).
  • Test functionality: Test the functionality of the systems controlled by the communication control module, such as the radio, navigation system, and driver assistance features.

What to Look/Listen For:

  • Smooth and reliable operation of all affected systems.
  • No unusual noises or malfunctions.
  • Clear and accurate communication between different vehicle systems.

FAQ

Q: Will this module need to be programmed?
A: Possibly. Some modules require programming to match your vehicle's specific configuration. Check with the seller or a qualified mechanic to determine if programming is necessary.

Q: How do I know if this is the right module for my car?
A: Make sure the part is specifically listed as compatible with your vehicle's year and model.

Q: What if the module doesn't fix the problem?
A: Communication problems can be complex. If the new module doesn't fix the issue, there may be other underlying problems that need to be addressed. Consult a qualified mechanic for further diagnosis.

Q: Is it okay to buy a used communication control module?
A: Yes, buying a used OEM module can be a good way to save money, as long as you buy from a reputable seller and the module has been tested and inspected.

Q: What kind of warranty should I expect?
A: Warranty coverage varies depending on the seller and the type of part (used or new). Check the seller's warranty policy before making a purchase.

Part Specifications

OEM Part Numbers:

  • BMW: 84105A0FC23, 84106836765, 84106841002, 84106844147, 84109380157, 84109380160
  • Other: 84

Fits Years: 2019 2020 2021

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