Monday - Friday, 9am-5pm EST

click to zoom in

have questions?

  • 100% Canadian

    No Duties or Brokerage

  • In-House Experts

    We know our products

  • Guaranteed Fitment

    Always the correct part

  • Fast Delivery

    Free shipping over $499

Density Line Performance Transmission Mount Set - 034-509-4050-SD

(No reviews yet) Write a Review
Warehouse Transfer
Minimum Purchase:
2 units
5 customers are viewing this product

Density Line Performance Transmission Mount Set - 034-509-4050-SD


We're proud to announce the availability of our new Density Line Transmission Mounts for BMWs!

034Motorsport's Density Line Mounts are the new standard in comfort and performance. Our mounts are redesigned with performance in mind, and manufactured from high-durometer rubber for increased performance and durability, without sacrificing comfort. Density Line Mounts are void-free and fluid-free, eliminating the slop associated with the factory mounts.

Street Density:

034Motorsport Street Density Engine Mounts are manufactured from 60 durometer rubber, which is a significant upgrade from the 45 durometer rubber used in stock BMW transmission mounts.

The result is greatly reduced drivetrain slop and crisper shifting, without any noticeable increase in noise, vibration, or harshness (NVH) inside of the cabin. The solid rubber, void-free design eliminates the possibility of collapse, which is a very common issue with factory mounts. These mounts are a completely re-engineered performance solution, not just inserts for use with the factory mounts.


  • Manufactured from 60 Durometer (Street Density) Rubber with Void-Free Construction
  • Reduced Drivetrain Slop
  • Decreased Transmission Movement Under Load
  • More Direct Power Transfer
  • Improved Shifting Feel
  • Complete Drop-In Replacement of Factory Engine Mount
  • Sold Individually (One Vehicle Requires 2 Mounts!)
  • 2006 - 2011 BMW 123d / 130i (E81)
  • 2003 - 2011 BMW 120d / 123d / 130i (E87)
  • 2006 - 2013 BMW 123d / 125i / 128i / 135i (E88)
  • 2006 - 2013 BMW 123d / 125i / 128i / 135i / M Coupe (E82)
  • 1989 - 2000 BMW 316g / 316i / 318i / 318is / 318ti / 320i / 323i / 323ti / 325i / 325is / 328i / 328i / M3 (E36)
  • 1997 - 2006 BMW 320Ci / 320i / 323Ci / 323i / 325Ci / 325i / 325ti / 328Ci / 328i / 330Ci / 330i (E46)
  • 2004 - 2011 BMW 316i / 318d / 318i / 320d / 320i / 320si / 323i / 325d / 325i / 328i / 330d / 330i / 335d / 335i Sedan (E90)
  • 2006 - 2012 BMW 318d / 318i / 320i / 323i / 325d / 325i / 328i / 330d / 330i / 335d / 335i Touring (E91)
  • 2005 - 2013 BMW 316i / 320i / 323i / 325d / 325i / 328i / 330d / 330i / 335d / 335i / 335is Coupe (E92)
  • 2005 - 2013 BMW 320i / 323i / 325d / 325i / 328i / 330d / 330i / 335i / 335is Convertible (E93)
  • 1995 - 2003 BMW 520i / 523i / 525i / 528i / 530i (E39)
  • 2009 - 2015 BMW 530dX / 535dX / 535iX (F07)
  • 2009 - 2015 BMW 530dX / 535dX / 535iX / M550dX (F10)
  • 2010 - 2015 BMW 520dX / 530dX / 535dX / 535iX / M550dX (F11)
  • 2012 - 2015 BMW 640dX / 640iX (F06)
  • 2011 - 2015 BMW 640dX / 640iX (F12)
  • 2011 - 2015 BMW 640dX / 640iX (F13)
  • 2010 - 2015 BMW 730dX / 740dX / 750dX (F01)
  • 2011 - 2015 BMW 740LdX / 740LiX / 750LdX (F02)
  • 1996 - 2002 BMW Z3 2.0 / Z3 2.2i / Z3 2.5 / Z3 2.5i / Z3 2.8 / Z3 3.0i / Z3 M (E36/7 & E36/8)
  • 2002 - 2008 BMW Z4 2.0i / Z4 2.2i / Z4 2.5i / Z4 2.5si / Z4 3.0i / Z4 3.0si / Z4 M (E85)
  • 2005 - 2008 BMW Z4 3.0si / Z4 M (E86)
  • 2008 - 2015 BMW Z4 23i / Z4 30i / Z4 35i / Z4 35is Roadster (E89)
  • 22316799331
  • 22316771219
  • 23711137817


  • 1 Year Limited Replacement Warranty (If you encounter any issues with our products outside of the warranty period, we will work with you to provide a resolution.)

Density Line BMW Engine Mount Cutaway Comparison

High-Durometer Rubber vs. Polyurethane:

Density Line Mounts are manufactured from high-durometer rubber instead of polyurethane for a number of reasons. While vulcanized rubber mounts are more expensive to prototype due to increased complexity of manufacturing and high initial tooling costs, rubber is inherently better than polyurethane as a damping medium for mounts and bushings.

Rubber is able to deal with stress under both tension and compression, while polyurethane mounts rely on the damping medium to be effective only under compression. Rubber is also excellent in shear, where polyurethane is ineffective, making it ideal for applications that apply a shear force to the bushing during articulation.

Rubber does not pack and wear like polyurethane does, which ultimately results in a long-lasting part with consistent performance and comfort.


When Will This Ship?

In stock This products will ship within one business day from our warehouse in Québec, Canada.

Direct ship This product will ship direct from our supplier. Processing time and availability is subject to suppliers stock.

Warehouse transfer This product could take up to 12 business days before leaving our warehouse for delivery. Availability is subject to suppliers stock.

Free Shipping

All orders of $499 or more being shipped within Canada qualify for free standard shipping. Additionally, orders less than $499 qualify for an exclusive low shipping rate. 

Learn more...

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Learn more...

My part doesn't have a fitment guide.

We're so sorry about that, but we're working on it! We list over 100,000 SKUs and we're updating them daily. Some products are uploaded without the fitment guides being built out. If you're unsure about product fitment, please email us via

  • How do I know if you have an item in stock?

    In-Stock Products

    In Stock

    Items marked as "In Stock" are physically in our facility, so they're ready to ship when the order is placed. If all items in your order are "In Stock", then your order typically ships within one business day.

    Other Availability Modes

    We use several availability modes to most accurately identify when products will leave their home facility:

    Direct Ship This product is available and will be sourced from one of our suppliers. It may take up to three business days before it ships.

    Warehouse Transfer We receive the item, then we ship it to remain on time with the guaranteed delivery range chosen at checkout. It typically takes between 6 and 12 business days before it ships.

    Discontinued - No longer available This product has been discontinued by the manufacturer and is no longer available.

  • How do I know if a part will fit my car?

    We update our catalog daily to provide the most accurate fitment information possible. When shopping for parts, please use the “select your vehicle” car selector on the home page. Once you've selected your car, you can filter parts specific to it.

    Additionally, on each product page, we have a tab for fitment information. By clicking on "Fitment", you can scroll and verify the part you are about to add to your cart indeed fits.

    Furthermore, if you have a vehicle added to our vehicle selector and you are viewing a product page, you'll see fitment information below the "add to cart" button. If an item fits your car it will display "This Part Fits Your: Selected Vehicule". If an item does not fit your vehicle a message will display "This Part Does Not Fit".

  • What is a core charge?

    A “Core Charge” is similar to the deposit you might pay for a can or bottle of soda. In many states, to promote recycling, you are charged a deposit when you purchase a can of soda and you receive your deposit back when you return the empty can. Many automotive parts have Core Charges that work the same way as a soda can deposit. The most common car parts that include a core charge are alternators, calipers, steering racks, and fuel injectors.

  • What is MAP pricing? Why can't I get a discount on a MAP item?

    "MAP" pricing, or Minimum Advertised Pricing, means that the vendor set a minimum retail price that we're not allowed to violate. MAP items cannot be discounted because the decrease in price would violate that threshold.

Customers Also Viewed

Free Shipping over $499

More Information*

Lowest Price Guarantee

More Information*

Secure Checkout Guarantee

More Information*

30-Day Free Returns

More Information*
to top