SKU: 37451111671

Bilstein B4 OE Replacement-Suspension Strut Cartridge (21-031502)

Sale price$63.90 Regular price$71.00
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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13

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Description

Bilstein B4 OE Replacement-Suspension Strut Cartridge (21-031502)Bilstein B4 OE Replacement dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. These dampers are the ideal choice for the driver looking to restore the original performance and handling of their vehicle, with the added benefit of world famous Bilstein quality. Notes: It's recommended to replace shock or strut in pairs (passenger and driver side at

Bilstein B4 OE Replacement dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. These dampers are the ideal choice for the driver looking to restore the original performance and handling of their vehicle, with the added benefit of world-famous Bilstein quality.

Notes:

  • It's recommended to replace shock or strut in pairs (passenger and driver side at the same time)

Features:

  • Constant damping characteristics under any load
  • Consistent performance and handling give the vehicle a new car feel every time
  • Proven Bilstein gas pressure technology
  • High OEM quality standards
  • High power reserves for maximum safety
  • Drive as thoughIt's the first time, every time
  • Technology transfer from original equipment manufacturing and motor sports
  • Comprehensive product range
  • High market coverage and availability
  • Ensures a high level of traction and more precise handling
  • A must-have for powerful sport suspensions
  • Added safety in all dynamic driving situations

Original-Equipment. The world’s foremost automotive brands put their confidence in Bilstein quality. Why? Because brand develops and series-produce suspension components in collaboration with Bilstein partners from the automotive industry. By placing your trust in Bilstein experience too, you'll be opting for the Bilstein driving experience when you exchange your suspension components.

Gas Pressure Technology. Over time, the mono-tube gas pressure technology developed by Bilstein has established itself as a standard in automotive construction. This technology involves keeping the oil in the absorber under pressure, which prevents it from foaming when temperatures and loads are increasing. As a result, full damping power is retained even when the system is placed under extreme stress, a feature that can be observed in the self-lowering piston.

Mono-tube Upside-Down Technology. The original and best: The original mono-tube gas pressure shock absorbers bore the Bilstein name, and we're still responsible for producing the best there is. Bilstein's mono-tube technology is the number-one choice in motorsports and series-production sports cars: no other type gives engineers the same freedom to choose the perfect installation location or position (e.g. Upside-Down technology).

Twin-tube Technology. The proven technology of a twin-tube absorber is applied in the vast majority of all vehicles. Bilstein‘s twin-tube absorbers, featuring "original equipment manufacturer” quality that has undergone rigorous testing, offer a marked improvement in driving characteristics with universal spare parts replaced in a timely and efficient manner.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 37451111671

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4.4 ★★★★★
Based on 12 reviews
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Verified Purchase
gnfo
Waukegan, US
★★★★★ 5
Nice bundle and great customer service
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
I purchased this as an economical bundle for my Roborock Qrevo Curv. All of the parts seem to work and fit properly, which is good since I have actually had problems with the main brushes from a different maker. The only issue I ran into was that the Roborock website seemed to indicate that all of the Qrevo Curv models use the same filter size. Apparently the CurvX/Curv 2 Pro use a different filter. When I asked VIEWALL about it through Amazon messaging, they were kind enough to let me know about the difference and even offered to send me filters for my model. So you can count on excellent customer service from the company.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
S
SaminAustin
Chelsea, US
★★★★★ 4
Affordable Roborock Qrevo CurvX Accessories That Fit Well
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
I have a Roborock Qrevo CurvX vacuum cleaner, so when I saw this replacement parts pack, I wanted to give it a try. The box contained everything needed to carry out the maintenance schedule recommended in the Roborock app. It even included a small screwdriver, which made changing the side brush easy — a thoughtful extra touch. I compared all of the replacement parts to the original ones and didn’t notice any major differences. Overall, the parts do seem slightly lower in quality than the originals, but not to the extent that I think it will significantly affect performance or durability. I replaced the side brush without any issues, and it fit properly. The mop pads were softer and fluffier than the originals and didn’t fit quite as snugly, although I don’t think this will have much impact on cleaning performance. The new filter installed perfectly, and the vacuum bags also fit as expected. Overall, I’m happy with this product. It’s reasonably priced and represents good value for money. I can see myself continuing to use these replacement parts in the future. I’m taking one star off due to the parts being of slightly lower quality
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Reviewed in the United States on May 13, 2026
K
Verified Purchase
K
Charlottesville, US
★★★★★ 5
Value replacements
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
As far as I can tell these are pretty solid replacements for the SAROS 10R. My original side brush was all torn up after just a few months of use so I found these replacement parts. Haven’t used the mop pads yet, but they are a similar design to the “upgraded” mop pads offered by Roborock which are superior to the standard one IMO. Everything else seems to be equal quality to the OEM parts, and at less than $12 I have no complaints on this kit.
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Reviewed in the United States on December 31, 2025
V
Verified Purchase
Vi. H
Phoenix, US
★★★★★ 1
Does not work for Qrevo Arc.
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
Filter does not fit my Qrevo Arc. Photo shows size comparison between my old (very dirty) filter and the replacement filter.
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Reviewed in the United States on April 6, 2026
S
Sean F.
New York, US
★★★★★ 4
Solid replacement parts kit — just skip the mop pads
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
This kit has been a handy all-in-one refresh for my robot vacuum. The main brush, side brushes, filters, and dust bags all fit correctly on my Qrevo, slid in without fuss, and have been performing on par with the originals — suction feels unchanged, the side brushes kick debris toward the intake properly, and the filters look and seat identically to the ones they replaced. My one real complaint is the mop pads. They're noticeably thinner and flimsier than the OEM pads, don't hold water as well during a run, and left streakier lines on my floors compared to what I'm used to. I've ended up going back to the original-brand mop cloths and just using this kit for the dry-cleaning parts, which have genuinely been a good value. Four stars — great kit minus the mops.
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Reviewed in the United States on April 15, 2026

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