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Engine Harmonic Balancer
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.

2009 - 2016 BMW Z4 Harmonic Balancer Assembly (OEM)

Only 1 left in stock
$189.95

ℹ️ Product Notes

This is a used part. It is a Harmonic Balancer assembly. This part is designed for vehicles with an Automatic Transmission.

Fits 3.0L Twin Turbo (N54) engines with automatic transmission only. Does not fit manual transmission models.
Condition: Excellent (A)
Like new, minimal to no wear
See Other BMW Z4 Engine Harmonic Balancers
SKU #
7978941-41605-903

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 2011-2016 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
sDrive35i Convertible 2011 - 2013 L6 3.0L Turbo RWD | Automatic | Fits sDrive35i and sDrive35is models with N54 engine only
sDrive35is Convertible 2011 - 2016 L6 3.0L Turbo RWD | Automatic Dual Clutch | Fits sDrive35i and sDrive35is models with N54 engine only
sDrive35i Pure Traction Convertible 2014 L6 3.0L Turbo RWD | Automatic Dual Clutch | Fits sDrive35i and sDrive35is models with N54 engine only

⚠️ 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 Harmonic Balancer Assembly:

  • Engine vibrations, especially at idle or low RPMs
  • A wobbly or visibly damaged balancer
  • Unusual noises coming from the front of the engine
  • Belt slippage or damage
  • Check engine light illumination

Testing the Harmonic Balancer:

  1. Visual Inspection: Look for cracks, separation of the rubber dampening material, or wobbling as the engine runs.
  2. Timing Check: Use a timing light to check the timing marks on the balancer. If the marks are erratic, the balancer may be failing.
  3. Listen Carefully: Use a stethoscope to listen for unusual noises coming from the balancer area.

Common Failure Causes:

  • Age and wear of the rubber dampening material
  • Exposure to extreme temperatures
  • Oil leaks contaminating the rubber
  • High engine RPMs and vibrations

Buyer's Checklist

What to Look For When Buying:

  • Check for visible damage like cracks or separation.
  • Make sure the balancer is the correct size and type for your engine.
  • Consider the reputation of the seller or manufacturer.

Quality Indicators:

  • Material: High-quality steel and durable rubber.
  • Construction: Solid and well-bonded components.
  • Testing: Evidence of testing and inspection.

What's Typically Included:

  • The harmonic balancer assembly itself.
  • Sometimes a new bolt is included, but not always.

Installation Overview

Difficulty Level and Estimated Time:

  • Moderate difficulty.
  • Estimated time: 2-4 hours.

Special Tools Needed:

  • Harmonic balancer puller/installer tool.
  • Socket set.
  • Torque wrench.

Critical Steps and Tips:

  1. Disconnect the battery.
  2. Remove the drive belt and any accessories blocking access.
  3. Use the puller tool to remove the old balancer.
  4. Install the new balancer using the installer tool.
  5. Torque the balancer bolt to the manufacturer's specifications.
  6. Reinstall the belt and accessories.
  7. Reconnect the battery.

DIY or Professional Installation:

  • DIY is possible for experienced mechanics.
  • Professional installation is recommended if you're not comfortable working on engines.

Buying Options

Compare: Used OEM, Refurbished OEM, New Aftermarket

FeatureUsed OEMRefurbished OEMNew Aftermarket
PriceLowestMid-RangeMid-Range to High
ConditionUsed, tested and inspectedProfessionally restored with new componentsBrand new
QualityGenuine factory partGenuine factory part restored to like-new conditionBuilt to OE specifications by a third-party manufacturer
WarrantyVaries by sellerVaries by sellerVaries by manufacturer
ProsBest value, genuine factory qualityRestored to like-new condition, genuine factory partBrand new, potentially improved materials
ConsMay have some wear and tearHigher price than used OEMQuality can vary between manufacturers, may not be identical to OEM spec

Used OEM:

  • Genuine factory parts, tested and inspected.
  • Offers the best value.
  • A cost-effective way to get a reliable replacement.

Refurbished OEM:

  • Factory parts professionally restored.
  • Often includes new components.
  • A good balance of price and quality.

New Aftermarket:

  • Brand new parts built to OE specifications.
  • Quality can vary between manufacturers.
  • A solid option if you prefer a new part.

Typical Lifespan

How Long This Part Normally Lasts:

  • 75,000 to 150,000 miles.

Factors That Affect Longevity:

  • Driving habits.
  • Engine maintenance.
  • Climate conditions.
  • Quality of the replacement part.

Price Ranges

Budget vs Mid-Range vs Premium Options:

  • Used OEM: $75 - $150
  • Refurbished OEM: $150 - $250
  • New Aftermarket: $125 - $300

Labor Cost Considerations:

  • Labor costs can range from $200 to $500, depending on the mechanic and location.

Total Job Cost Estimates:

  • Total cost can range from $275 to $800, depending on the part and labor costs.

Vehicle-Specific Notes

Known Issues:

  • Some models are prone to harmonic balancer failures due to the engine's design and operating conditions.
  • Check for any Technical Service Bulletins (TSBs) related to this part.

Verification After Install

How to Confirm Proper Operation:

  • Start the engine and let it idle.
  • Check for any unusual vibrations or noises.
  • Use a timing light to verify the timing marks are stable.

What to Look/Listen For:

  • Smooth engine operation.
  • No unusual noises from the balancer area.
  • Stable timing marks.

FAQ

Q: How do I know if my harmonic balancer is bad?
A: Common signs include engine vibrations, a wobbly balancer, and unusual noises.

Q: Can I drive with a bad harmonic balancer?
A: It's not recommended. A failing balancer can cause serious engine damage.

Q: Is it hard to replace a harmonic balancer?
A: It requires some mechanical skill and special tools, so professional installation is often recommended.

Q: What happens if I don't replace my harmonic balancer?
A: You risk engine damage, belt failure, and reduced engine performance.

Q: How often should I replace my harmonic balancer?
A: Typically every 75,000 to 150,000 miles, or when you notice signs of wear or failure.

Part Specifications

OEM Part Numbers:

  • BMW: 11 22 7 558 083, 11227558083, 7558083

Fits Years: 2009 2010 2011 2012 2013 2014 2015 2016

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