Fall 2021: Shipping Carrier Delivery Status, Inventory Updates, Customer Support More Info

33-185934 Bilstein B8 5100 Monotube Gas Shocks 33-185934

Bilstein B8 5100 Monotube Gas Shocks 33-185934

780 reviews
  • Sale
  • Regular price $94.00

In Stock
Part Number Position Item Quantity
33-185934 Rear Shock Absorber 1
Package Contains 1 Shock

Package Contains 1 Shock

You'll be getting one shock absorber.

Bilstein Limited Lifetime Warranty

Bilstein Limited Lifetime Warranty

Manufacturer Warranty protects against defects and premature failure.

Factory Hardware for Installation

Factory Hardware for Installation

All necessary washers, bushings, reservoir clamps, and nuts included. Factory shock mounting bolts are reused for installation. Mounting plates sold separately.

Ideal for Large Tires & Lifts

Ideal for Large Tires & Lifts

Designed for vehicles with larger wheels and tires, or lifted vehicles with higher center of gravity. Factory spec vehicles should use Bilstein 4600 for shock replacement.

High Performance Shock

High Performance Shock

The B8 5100 can handle increased heavy duty loads, towing, and off-road terrain.

Versatile Design

Versatile Design

Reduces body roll and nose dive, while being more compliant over bumps and holes, ideal for daily driven vehicles that also off-road for fun or work.

Durable and long lasting

Durable and long lasting

Zinc plate finish, providing corrosion and rust resistance in harsh environments.

Product Details

Bilstein 5100 shocks utilize a monotube design, with a 46mm digressive piston, to increase road handling characteristics both on and off-road. The single tube body allows for rapid heat transfer between the shock oil to the shock body, and then dissipated further to reduce shock fade. German engineering combined with US manufacturing ensures optimum performance and longevity for upwards of 100k miles (real customer feedback!). The 5100 series is more compliant in tougher situations and off-road terrain compared to the 4600 series. Factory spec vehicles should use the 4600 series shocks as the valving is more appropriate for daily driven vehicles and pavement environments.

We have the entire line of Bilstein products available, whether you want to upgrade, add a reservoir, or find something more affordable, contact us with any questions!

Year Make Model Drive Position Lift
2006 Jeep Wrangler 4WD Rear 3.5-6
2005 Jeep Wrangler 4WD Rear 3.5-6
2004 Jeep Wrangler 4WD Rear 3.5-6
2003 Jeep Wrangler 4WD Rear 3.5-6
2002 Jeep Wrangler 4WD Rear 3.5-6
2001 Jeep Wrangler 4WD Rear 3.5-6
2000 Jeep Wrangler 4WD Rear 3.5-6
1999 Jeep Wrangler 4WD Rear 3.5-6
1998 Jeep Wrangler 4WD Rear 3.5-6
1997 Jeep Wrangler 4WD Rear 3.5-6

We ship internationally, contact us for a shipping quote with your postal code.

Part Number 33-185934
Extended Length 25.000"
Compressed Length 15.410"
Travel 9.590"
Top Mount BARPIN
Bottom Mount EYELET
Reservoir No
Color Silver
Finish Zinc Plated
Boot Included Black Bellows
Gas Charged Yes
Internal Design Monotube

Bilstein Warranty

Thyssenkrupp Bilstein of America warrants its gas pressure shock absorbers against defects in workmanship and materials for as long as you, the original purchaser, own your car.

If a shock, strut, or coil-over malfunctions and BILSTEIN determines it to be defective, we will either replace it or repair it, depending on the term of the warranty based on the assembly's model type.

BILSTEIN from the factory (original equipment), warranty claims must be directed to the vehicle manufacturer.


B4 OE Replacement / B6 / B6 Performance / B8 Performance Plus / B12 Series / B14 (PSS) / B16 (PSS9 & PSS10) / B6 4600 / B8 5100 / B8 5100 (Ride Height Adjustable) / B8 5112 / B8 6112

BILSTEIN warrants to the original retail purchaser that, for the life of each gas pressure shock, this product shall be free from defects in material and workmanship. Proof of purchase is required to process warranty. Please return product to the original place of purchase.


B4 OE Replacement (Air) / Steering Racks

BILSTEIN warrants to the original retail purchaser that, for a period of two (2) years from the date of purchase, the B4 OE Replacement (Air) suspension and Steering Racks shall be free from defects in workmanship and/or material. Proof of purchase is required to process warranty. Please return product to the original place of purchase.


B8 5125 / B8 5150 / B8 5160 / B8 5165 / M 7100 Series / B8 8125 / M 9100 Series / M 9300 Series / BILSTEIN Clubsport® / MOTORSPORTS PRODUCT

BILSTEIN warrants to the original retail purchaser that, for a period of ninety (90) days from the date of purchase, this product shall be free from defects in material and workmanship. Any implied warranty of merchantability, fitness or fitness for particular purpose, except as may be prohibited by applicable law, is likewise limited in duration to ninety (90) days from the date of original retail purchase. Some States do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you.

This warranty is non-transferable and does not cover normal wear and tear or any other loss, liability or damage resulting from improper alteration, disassembly, handling, installation, service, repair or use of this product. Should this product fail as a result of a defect in materials or workmanship within the warranty period, contact BILSTEIN's Warranty Service Department by telephone at 1(800) 370-9522, or in writing at thyssenkrupp Bilstein of America 14102 Stowe Drive, Poway, California, 92064, for repair or replacement at Manufacturer's option. Do not return this motorsports product to the place of purchase. Proof of purchase is required to process warranty.


The limited warranties set forth above do not cover normal wear and tear and are non-transferable. The following are warranty exclusions:

Original equipment shock absorbers (vehicle manufacturer warranty) -Improper installation -Racing, driving competition or off-road use -Modified use or other than BILSTEIN recommended vehicles -Commercial vehicles -Bent or broken Rods showing abuse or abnormal wear

Surface finish, boot or mounting hardware such as, but not limited to, rubber bushings, as well as labor charges are not covered by any of the foregoing limited warranties. BILSTEIN's liability for a defective shock absorber is limited to replacement of shock with a new or reconditioned BILSTEIN shock absorber. Repair or replacement as provided by this warranty is customer's sole and exclusive remedy in the event of a product failure. Manufacturer shall not be liable for any incidental, consequential or other damages resulting from the disassembly, handling, installation, service, repair or use of this product. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

Note: Other exclusions may or may not apply in certain states or rare circumstances.

Warranty Contact Info:

If you have a warranty concern or question, please contact us

FREE Shipping applies to all products shipped to the lower 48 United States.

All other shipping destinations that are available will be calculated at checkout, or you should contact us prior to your sale - contact us.

Shock Surplus ships to the following destinations, and more:

  • All of North America
  • All of Europe
  • United Arab Emirates
  • Australia
  • Most Asian countries

Contact us for a free direct quote to your location.

30-Day Hassle-free Return & Exchange Policy - Stuff Happens!

Start Your Return Process

We sell only brand new, never-installed, authentic, brand-name parts. If your order arrives damaged, is missing hardware, appears used or pre-installed, or is incomplete in any way, we will jump into action to send replacements. We can usually have replacements sent immediately for these rare cases of damaged, incomplete, or incorrect orders.

Shock Surplus allows returns and exchanges inside of a 30-day window starting from time of receipt by the customer. It is our mission to make every transaction smooth, and fix any issues you may encounter.

  • Products must be new, unused, and in uninstalled condition for us to accept a return.
  • We do not accept installed parts, so be sure you have the correct part number(s) before attempting to install them on your vehicle.
  • Returned parts must contain all associated hardware, otherwise that part number will be deducted from your refund.

Return Shipping Costs

We are available to make every transaction flawless for our customers, the Shock Surplus staff is available to guarantee fitment on every part we sell. Shipping costs responsibility are as follows:

  • Misboxed Item - Shock Surplus Responsibility
  • Incorrect Item Sent - Shock Surplus Responsibility
  • Incorrect Item Ordered - Customer Responsibility
  • Order Error (Address, Vehicle Fitment) - Customer Responsibility
  • Changed Mind - Customer Responsibility
  • Damaged in Transit - Shock Surplus Responsibility

Returns Under Customer's Responsibility

  • Below 50lbs - $15 flat rate deducted from the refund. Shock Surplus will provide a shipping label to make this process as easy as possible.
  • Greater than 50lbs - Discounted shipping rates to get the product(s) back to Shock Surplus, that amount will be deducted from the refund. 50lb+ packages are automatically labeled 'Oversize' by our couriers, and automatically incur a $25 charge on top of the shipping fee.

Returns under Shock Surplus' responsibility

  • Free, we will provide a return shipping label and ship the replacement parts for free. If a refund is preferred, a full refund will occur.

International Orders

  • Orders are final, no returns
  • Orders shipped to a freight forwarder in the US, are eligible for return if the product has not left the United States.
  • It is the responsibility of the buyer and exporter to ensure correct items received before exporting. Shock Surplus is not responsible for items received once the freight forwarder has shipped the product.

Customers that wish to return products in order to exchange for different product will not be subject to a restocking fee. Our staff is on hand to make sure that your first purchase is exactly correct for your needs and vehicle, do not hesitate to contact us prior to your purchase through Live Chat or Email.

To start a return or exchange, please fill out THIS FORM, and be as specific as possible, and someone will be in touch with you in ~1 business day. The typical turnaround for a refund or exchange is 5-10 business days, depending on the complexity of the case. Exchanges are subject to availability of stock; any exchanges proving out of stock will be refunded to the customer.


You should expect to receive your refund within 5-7 business days of our warehouse receiving your return. The amount of time it takes for your refund to show up in your account varies by payment method, but typically takes 1-3 business days. You will also receive a message confirming the refund via the marketplace where the purchase happened. We wish we could speed up the process of funds reaching your payment method following a refund, but it is out of our hands.

If you need to return an item, simply login to your account (top right corner of the screen), 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. You can also contact contact us for any return requests.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page.

Customer Reviews
4.9 Based on 780 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Gary W.
United States United States

Jeep shocks

Shocks are excellent. The installation was simple for the front. The rear shocks on a jeep wrangler are an adventure, a pain in the a**. The mounting bolts are in a very bad spot and even after soaking with WD40 for two days one of the 4 mounting bolts broke (a very common occurrence). If you aren't mechanically inclined better to have them installed. The shocks are excellent!!!

Eric J.
United States United States

Rare review from me - excellent

Excellent choice. Smooth ride. Should have bought them 50K miles ago

Santiago H.
United States United States

Bilstein shocks

They are AWESOME shocks and Shock surplus is definitely thumbs up..... I will be purchasing from Shock surplus for many years to come.... THANK YOU SHOCK SURPLUS...

Mark M.
United States United States


Great shocks. Truck handles so much better.

United States United States

Great product and buying experience

I bought these shocks for my husband’s F150 Platinum and he likes them. Seems to be doing the job well. The buying experience was easy, shipping was quick, would definitely recommend this company again and would come back to get his front shocks from here again as well!