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1992 Mercedes-Benz 400SEL
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Timbren Suspension Enhancement System - Rear Axle
Part Number: T45MR
In Stock
$269.36
Retail:$316.90
You Save: $47.54
1992 Mercedes-Benz 400SEL
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Timbren Vehicle Suspension - T45MR
Highlights
- Custom Fit for Your Vehicle: Mounts to existing attachment points
- 6,000-lb Load Support: Keeps your vehicle level and steady when towing or hauling heavy loads.
- Less Sag and Sway: Reduces squat and body roll so steering and braking stay consistent.
- No-Maintenance Design: Rubber springs work automatically with no air lines or compressors.
- Smoother Ride Over Bumps: Hollow rubber absorbs road shock to prevent harsh jolts and bottoming out.
- Simple Bolt-On Install: Custom brackets and hardware mount to the frame with no drilling required.
Features to know about
Stay Level Under Load: 6,000-lb Rear Axle Support
When heavy cargo or a trailer pushes your rear suspension down, steering and braking can feel light and unpredictable. The Timbren Suspension Enhancement System adds up to 6,000 lbs of load-leveling capacity to keep the vehicle sitting level and stable. The hollow rubber springs stiffen progressively as weight increases, helping prevent rear-end sag and keeping handling steady when you’re towing or hauling serious weight.
Smooth Out the Rough Stuff: Progressive Rubber Spring Design
Rough roads and uneven terrain can punish your factory suspension. Timbren’s hollow rubber springs act as shock absorbers, soaking up bumps and jolts before they reach the cab. The convoluted design collapses smoothly under load, then firms up as weight increases to maintain control. You get a smoother, more stable ride under load while also reducing wear and tear on your stock suspension parts.
Handle Off-Center Loads with Confidence: Independent Spring Action
Uneven loads can throw your truck off balance, especially when cornering or swerving. Each Timbren spring works independently on its side of the vehicle to support off-center loads and reduce body roll. That independent action helps you stay in control during quick maneuvers or crosswinds, keeping the truck level and the trailer tracking straight.
Skip the Air Lines and Adjustments: Simple Bolt-On Design
There’s no need to run hoses, mount gauges, or manage air pressure. The system bolts directly to the frame above the rear axle using custom brackets and included hardware—no drilling required. Once installed, it automatically engages as weight increases, providing support exactly when needed without any manual setup or ongoing maintenance.
Built to Last a Lifetime: Durable Rubber Construction
Timbren’s heavy-duty rubber springs are engineered for years of service without leaks or adjustments. The dense rubber material resists cracking while maintaining elasticity for a comfortable ride under load. With a lifetime warranty and satisfaction guarantee, it’s a reliable way to improve handling, reduce squat, and extend the life of your factory suspension system.
Specs
Weight and Capacity
- Load-leveling capacity: 6,000 lbs
Warranty
- Lifetime warranty
- Satisfaction guarantee
Note
Timbren springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
TORTNDR Timbren SES with Aeon Hollow Rubber Springs - Rear Axle
This Product Fits The Following Vehicles
- 2022 - 2027 Toyota Tundra 2 Wheel Drive
- 2022 - 2026 Toyota Tundra 4 Wheel Drive
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
- Arrived Damaged
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.7
7322 reviews
by:
Kevin, CT 2026 Tundra, 2026 Apex 188 RBST
07/18/2026
2,000 miles in on a trip from the east coast to the Canadian Rockies these work great while loaded and towing. Close to zero bounce while towing, I love them. Unloaded, however, the ride in my 2026 Tundra has gone south. There is a noticeable, abrupt stop of the units hitting the axle when going over any kind of bump. When I get home and back to regular driving, I may just take them off, its that bad.
by:
Ryan
08/16/2026
2024
Toyota
Tundra
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?
by:
David
07/28/2025
Just made my first pull of our new to us eight thousand pound bumper hitch travel trailer with my 2023 Tundra. Of course used a leveling hitch but was really pleased how the Timbren helped to stabilize the load. Did get some Dolphin effect crossing a very long bridge but I just backed off the accelerator a little and it smoothed right out. At this point I highly recommend the Timbren. Super easy to install on the Tundra and when you compare the OE stops to the Timbren there really is no comparison. See the picture and that is an I Phone eleven case to give a size comparison.
by:
L
09/18/2026
Toyota
Tundra
I have a 7000 pound travel trailer and a 2024 Toyota tundra. I was getting the sack that Toyota‘s are known for… Put these in and they work fantastic… I recommend.
by:
Art
04/05/2025
Toyota
Tundra
No complaints. This was an easy install, didn’t even have to take the tires off. Helps my tundra was two months old and hasn’t seen any rain (clean and all bolts were corrosion free).
Etrailer was awesome, thanks to Brandon… he clarified correct part number and ordered everything in one phone call. Excellent customer service.
Etrailer was awesome, thanks to Brandon… he clarified correct part number and ordered everything in one phone call. Excellent customer service.
Art
4/6/2026
After a year still satisfied. So Sayisfied I moved to a 2026 F350 Super Dury. Waiting to hear back from Etrailer to order all new Timbrens. . Thanks Etrailer & Timbren.
by:
CN
10/27/2025
2024
Toyota
Tundra
Outstanding fitment and great product. Works wonderful for towing our trailer with our 2025 Toyota Sequoia
by:
Brian
08/30/2026
2025
Toyota
Tundra
It was very easy to install and has made a big difference when towing my travel trailer. No sag and better stability while driving.
by:
Jerry
05/23/2026
Toyota
Tundra
E Trailer pricing was the best I could find and their service was awesome. Jacob F did an outstanding job in getting the parts shipped to me quickly. The Timbren Suspension Enhancement System for my 2023 Tundra was so simple to install and it is performing exactly as I had hope that it would. Great buy from a great supplier.
by:
Scott
04/02/2026
2024
Toyota
Tundra
Cost 2
Ease of install 5
Levels truck 4
Ride comfort 2
This averaged out to be a 3.25 rounded to 3.
I think the cost is a little high for such a simple product.
It was a very simple process to install.
It leveled my 24 Tundra 4 door pretty decent. Still some squat.
The ride is a jarring bounce when it hits the bump stops.
It does what it is supposed to but at a price. I still havent decide if I am going to switch to air bags (which will also come from etrailer-they have been great and accommodating as needed)
Ease of install 5
Levels truck 4
Ride comfort 2
This averaged out to be a 3.25 rounded to 3.
I think the cost is a little high for such a simple product.
It was a very simple process to install.
It leveled my 24 Tundra 4 door pretty decent. Still some squat.
The ride is a jarring bounce when it hits the bump stops.
It does what it is supposed to but at a price. I still havent decide if I am going to switch to air bags (which will also come from etrailer-they have been great and accommodating as needed)
by:
George
07/22/2026
2026
Toyota
Tundra
Product is well built installation was a breeze didn’t even have to take the wheel off and ordering from etrailer is the only way to go
by:
Bret
03/21/2025
Well worth it! Very easy install! My truck remains level with any load. I still use a WDH but it’s a great knowing I’ll always be level. How does it ride empty? They do not engage unless you have 4 people in the cab and hit a very large bump. It then feels like a truck. I never have to worry about a leaky bag or air pressure levels.
Gwendolyn Y.
3/21/2025
Looks like you have been traveling to all sorts of places, Bret! What kind of travel plans do you have coming up this year?
by:
Joseph
03/18/2026
Installed with spacer kit as the truck has a small lift. Did not bring truck back to level like I hoped. Please see full review at the Timbren spacer kits.
by:
Jesse
03/20/2024
Pros: Cheaper and easier to install than airbags, do the job when load is enough to compress the shock, with added weight or towing, then it stiffens the rear very nicely.
Cons: Doesn't do anything until there is 2-3cm of compressed shock. It sits above the contact point, doesn't touch. Under normal driving, there is no benefit/improved stiffness/anti sway in rear or a leveling of the factory rear sag in a 2022 or newer Toyota Tundra.
If had it to do over, would have put some kind of spacer in between product and upper included bracket, the supplied bolt is long enough to accommodate, to eliminate the gap, and lift the rear 1-2 cm. Should do it anyway, maybe when swapping to summer wheels next month.
Cons: Doesn't do anything until there is 2-3cm of compressed shock. It sits above the contact point, doesn't touch. Under normal driving, there is no benefit/improved stiffness/anti sway in rear or a leveling of the factory rear sag in a 2022 or newer Toyota Tundra.
If had it to do over, would have put some kind of spacer in between product and upper included bracket, the supplied bolt is long enough to accommodate, to eliminate the gap, and lift the rear 1-2 cm. Should do it anyway, maybe when swapping to summer wheels next month.
by:
Roadrunner Tuning
02/17/2025
Install on 2025 Tundra. Excellent product quality. Simple installation. Bracket mounting is slotted for variation in frame and helped with installation. Total time for install was close to one hour.
Heather A.
2/19/2025
Hey! Happy Wednesday! Your install looks great. The photos will be helpful to future customers checking out the reviews, so thank you for taking the time to submit them!
by:
Mike
05/21/2026
Not worth it get air bags
by:
David
05/16/2026
A relatively easy install. Did a terrific job of reducing the squat with a travel trailer hooked up.
by:
Bear
07/12/2026
Great service at etrailer. Easy install.
by:
Arthur
01/28/2025
I have always got very good things from E-trailer and price has been right on good when i compared with other site . There on my first go to site when i need things .
Arthur
1/29/2026
Fantastic !!!! All the stuff we get from you folks is super and spent thousands . We have the timbrens and weight distribution hitch set up and some times i have to look to be sure my 21 ft trailer is still back there due to such a smooth ride .
by:
Richard
10/25/2024
Toyota
Tundra
The Timbrens work as advertised. My Tundra squatted quite a bit when I hooked up my boat and trailer which is about 7500 pounds dry. The Timbrens only let the truck squat about an inch and have not changed the quality of the ride with no load. I would highly recommend if you do not want to spend the extra money for air suspension. Super easy to install as well.
by:
Danny James
11/06/2026
Thank you for the item that I purchased. They got here on time. I’m very pleased. Thank you very much.
by:
Steve A
09/26/2026
2024
Toyota
Tundra
Easy to install, and noticed the difference right away when hooked up RV and drove around.
by:
Mark
10/19/2026
These work great on my 2025 Tundra
by:
Martin
09/30/2026
Received item yesterday. Thanks for all the help will install this weekend
by:
Greg
04/29/2026
Exactly what I needed. Customer Service was really good.
by:
Young
03/21/2026
UPGRADE MY TRUCK SUSPENSION.
25
7322
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Show More Reviews
See what our Experts say about this Timbren Vehicle Suspension
- Do I Want Sumo Springs or Timbrens to Pair with My Weight Distribution Hitch?Hello Barry, Since you already have a weight distribution (WD) hitch and are only experiencing a little rear sag, I recommend going with SumoSprings. I typically only suggest Timbrens for those who are towing heavy loads regularly, as they can create a noticeably harsh ride when the vehicle is unloaded. Given that the sag is “not much but noticeable,” the SumoSprings Custom Helper Springs Rear Axle # SS46PV (blue) should be a great fit. These are rated for 1,400 lbs, while the yellow...
view full answer... - Availability of Timbren Rear Suspension Kit that Fits 2026 Toyota TundraHey Thomas, we have the TORTNDR that fits your 2026 Toyota Tundra with our part number # T45MR. We also have the severe duty part # T65MR that is their part number TORTTNDR. What version of the Tundra do you have?
view full answer... - Do I Need to Add Timbrens to the Front of My 2024 Toyota Tundra for Hauling a 7K Trailer?Hello Edward, Great choice on the Timbrens for the rear. Since all of your weight is in the rear of the truck I do not think that it is necessary to put them on the front, even with hauling a 7,000 pound trailer. All of the focus is on the tongue weight which is what pulls the rear of your truck down. Now if you were thinking of installing a winch, using a snow plow, or any heavy accessory on the front of the vehicle, then you would want to add the Timbren Front Suspension Enhancement...
view full answer... - Will SumoSprings Fit 2023 Toyota Tundra TRD With Lift KitHey Joshua! All of the SumoSprings like # SS46PV are designed to fit the Tundra at stock height. SuperSprings does not offer additional spacers to make up for the height difference so these won't work on your Tundra TRD with the lift. What you can use instead is the Timbren Suspension Enhancement System # T45MR. You will also need the Spacer Kit for Timbren Suspension Enhancement System # T33AV. If you don't like the Timbren the only other option would be to add an air bag system like...
view full answer... - What Suspension Upgrade do I Need for My 2025 Tundra with In-Bed Camper?Hello Dan, Looks like you already found the beefier option. The Timbren Suspension Enhancement System - Rear Axle # T45MR with the Spacer Kit for Timbren Suspension Enhancement System # T33AV is exactly what I'd recommend for your setup. Since you're carrying the Tune camper and Decked drawer system full-time, you have a constant load on the rear suspension, which is where the Timbren system really shines. The Timbren springs replace the factory bump stops and provide additional support...
view full answer... - Recommended Timbrens and Spacers for a 2025 Toyota Tundra w/ a Factory Lift Hey Scott, congrats on the new truck. I checked with Timbren's website and they do not go into specifics on how many spacers or what size you're going to need. The instructions for the Timbren Suspension Enhancement System item # T45MR say to leave a 1/2" - 1-1/2" gap between the spring and the part of your axle where they contact. Giving a range like that is so you can adjust the spacers for your comfort and ride height preferences. Since your 2025 Toyota Tundra has the factory lift,...
view full answer... - Timbren Suspension Enhancement For 2024 Toyota Tundra With 3-1/2 Inch LiftHi David, There is an option for bump stops for your 2024 Toyota Tundra with a 3-1/2 inch lift by using Timbrens, you'll just need a spacer kit and some extra spacers to go with it. So what you can use is the Timbren Suspension Enhancement System # T45MR, Spacer Kit # T68MR, and a couple of the Timbren 1" Spacer # TA25723-90AD00.
view full answer... - Is Spacer Needed for Install of Timbren Kit T45MR on 2024 Toyota Tundra SR5Hey Jerry, you would not need to use any additional spacers with the Timbren kit part # T45MR that fits your 2024 Toyota Tundra SR5. Since your truck is all stock and this kit was designed to fit your vehicle no additional spacers would be required.
view full answer... - Should I Run the Spacer with the Timbren for 2025 Toyota Tundra Hey David, I would test fit everything and see which orientation works best. With the spacer or without. Ideally when the kit is installed there will be 1 inch of space between the Timbren and the frame so whichever orientation gets closest to that would be what you'd want to go with. If you do run the spacer and you find that the ride quality is rough you can always remove it to improve the ride quality.
view full answer... - Height of Timbren SES for 2025 Toyota Tundra 4x4Hey Gregg! The overall height of the Timbren Suspension Enhancement System # T45MR is 6". See the attached picture. This is confirmed to fit your 2025 Toyota Tundra 4x4 without a lift. If you need anything else feel free to reach out in the comments below.
view full answer... - Which Timbren Rear Suspension Enhancement Kit for 2022 Toyota TundraHey Matt, so you would definitely want to go with the standard capacity Timbren kit part # T45MR that fits your 2022 Toyota Tundra over the severe service. The severe option is for trucks that will always have a heavy load in the bed like a camper or always towing a trailer. For your application it would be WAY to harsh and you'd hate driving the truck. The standard duty will be a much better blend of ride quality and support.
view full answer... - Will Timbren SES Require Spacers on 2023 Toyota Tundra TRD With Factory LiftHey Chris! Timbren does recommend using the spacers # T33AV on your 2023 Tundra TRD with the factory lift. This will give you the correct gap when installing the Timbren Suspension Enhancement System # T45MR so it engages properly. Are you adding these for towing or something else?
view full answer... - Suspension Enhancement for 2024 Toyota Tundra With 3" LiftHey Joe! SumoSprings doesn't have an option for additional spacers so they will not work with your lift. The gap between the springs and the frame would be too much so they would never engage. If you don't want air bags the Timbren SES # T45MR is the only option. The height of the Timbren is 6" and you want about a 1" gap so you can add two of the Timbren 1" Spacer For Raised Frame Vehicles # A25723-90AH00 on each side. Take a look at the picture of the spacers below, it will still be...
view full answer... - Difference Between Spacer KitsHello again Chris; the # T68MR is for the severe service kits that fit the 2000-2021 Tundra. These are designed for heavy applications under constant load like a salt spreader. Since you will be using the standard Timbren SES # T45MR the Spacer Kit for Timbren Suspension Enhancement System # T33AV is the correct set of spacers.
view full answer... - What Is The Difference For The Timbren Jounce Springs For a 2022 Toyota Tundra? First we have the Timbren Active Off-Road Bumpstops # T83MR for your 2022 Toyota Tundra. These bump stops allow for the most suspension travel while still absorbing road shock to improve your suspension comfort off road. The Timbren Suspension Enhancement System # T45MR is their standard set of jounce springs. This is the kit you want if you are looking to reduce sag while hauling heavy loads but also still drive without any additional weight at times. Finally the Timbren Severe Service...
view full answer... - Recommended Suspension Enhancement For 2022 Toyota Tundra With 3-1/2 Inch LiftThat's a cool set up you have there, and the best option for suspension enhancement for your 2022 Toyota Tundra is going to be Timbrens to help support the added weight in the rear. The correct part number for your '22 Tundra is the following: - Timbren Suspension Enhancement System - Rear Axle # T45MR The reason why I like the # T45MR is because they the brunt of that added weight, engaging when needed to counteract any type of sag and body roll you'll get with the camper and that added...
view full answer...
- Is T45MR a good fit for my 2024 Toyota Tundra to aid in hauling my 6000 lb camperHi Tom, since you only tow 40 hours out then I would recommend taking a look at part # HE49FR, the Hellwig Pro Series Helper Springs. They have 2,500 lbs capacity and are bolted on between your factory leaf springs and the bump stop. The Timbren springs are good however they work best when the truck is carrying a load. When the truck is empty, they tend to give a rougher ride. You can still use them however be prepared to uninstall when you are not towing. The Hellwig springs can be adjusted...
view full answer... - Options For Helping The Rear Suspension On A 2023 Toyota Tundra SR5 6.5' BedThere will be a few options for helping the rear suspension on your 2023 Toyota Tundra. Adding a Timbren Suspension Enhancement System # T45MR will certainly help to reduce sagging and improve stability when towing. The main advantage of Timbrens is they are easy to install and require no maintenance. The downside is that they may create a bit of a bumpy ride at times when you are not towing or carrying your quad. The other option is adding an air bag kit like the Air Lift LoadLifter...
view full answer... - Recommendation For Reducing Sag On 2022 Toyota Tundra SR 4x4 When Trailer TowingThe best solution for reducing your rear end sag on your 2022 Toyota Tundra SR while also providing for the safest ride possible is by installing a Equal-i-zer Weight Distribution System. The Equal-i-zer helps to redistribute the tongue weight more evenly across your Tundra reducing sag. Reducing rear end sag removes the light steering feel and diminished braking. This hitch also helps to reduce trailer sway which often occurs due to the large size of the camper and strong winds. You will...
view full answer... - Timbren Suspension Enhancement Options For A 2023 Toyota Tundra TRD PRO With the Timbrens there isn't a difference in fitment between standard model Tundra's and the TRD Pro so you'll be able to use one of the following options for your rear suspension: 4,800lb capacity # T83MR 6,000lb capacity # T45MR 7,000lb capacity # T65MR If you'd like to swap out the front bump stops as well then you can choose from the following options: 1,800lb capacity # TABSTOF 14,000lb capacity # TTOFTUN4
view full answer... - Overall Height of Timbren Suspension Enhancement System T45MR For Toyota TundraI checked with Timbren, and the overall height (from the top of the bracket that bolts to the frame to the bottom of the spring) is 6 inches for the Timbren Suspension Enhancement System # T45MR.
view full answer...
- Will Installing Timbren SES Affect Offroad Performance Of A 2024 Toyota Tundra TRD ProHey Carlos, Yes, installing the Timbren Suspension Enhancement System # T45MR will affect your ride quality and handling while off-roading in your Tundra. These springs provide a cushion between your frame and axle so that the harsh bumps over rough terrain won't throw you around. Timbrens are well known within the off-roading/overlanding community as the gold standard for suspension enhancement so you're making a solid choice. Timbren recommends a 1" gap between the axle and spring...
view full answer... - Best Timbren Suspension Kit for a 2024 Toyota TundraThe best Timbren kit for your 2024 Toyota Tundra is the Timbren Suspension Enhancement System # T45MR rated for 6K. The Off-Road kit and the 7K kit will have the Timbren bumpers engaging a bit quicker than what you'll need with standard vehicle use which is why the 6K version is best.
view full answer... - What Do The Timbren SES # T45MR Bolts Need To Be Torqued ToHey Andrew, Timbren's official instructions state that there is no specific torque value you need to match when installing a hollow rubber spring. The rubber spring needs to be tightened until it is snug, and no more. So you'll essentially just be tightening it until it's hand tight with the wrench. In Brad's installation video (attached below) for the Timbren SES # T45MR he recommends using some Loctite # LT37420 as an extra precaution to prevent any vibration from loosening the bolts.
view full answer...
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Lazer S.
7/20/2026
Glad they are working well for you, Kevin! Well, while you are towing, that is. We have heard that these can be pretty rough when unloaded, but work great when you are loaded. A quick release function on these would make taking them off when not towing a lot easier. I may pitch that to Timbren to see if they can work something out. I will tell them to call it something like the Kevin Device if they agree! ^___^ Sounds like quite the trip! What has been your favorite stop so far?