Jounce Bumper (also known as Bump Stop, Bump Rubber, Rubber Buffer or Strut Bumper) is an elastic component typically made of high-elasticity polyurethane (MDI/NDI), installed on the piston rod of a shock absorber to provide progressive auxiliary stiffness at the end of the suspension compression stroke.

Functions

· Provides auxiliary stiffness at end of compression stroke, limits travel, prevents bottoming out.

· Absorbs impact energy, reduces noise and load from metal-to-metal contact.· Improves ride comfort under large impacts.

Temperature Range-40°C to +90°C (meets standard passenger car requirements; material can be adjusted for special conditions).

Service LifeDesign life ≥80,000 km or 2 years under normal use – no cracking, excessive permanent deformation, or stiffness loss.

Warranty & Quality

· Quality Standard: IATF 16949. Inspects static stiffness curve, compression set, hardness, appearance.

· Warranty: Typically 1–2 years or 50,000–100,000 km.

OE/OEM Numbers:

Volkswagen/Audi/Skoda/Seat

4G0512131D,7L8412303,6Q0512131D,7P0411177,7P6412303B,7P6512131B,7N0511359,8R0412131D,8K0512131,8K0512131A,5N0511359F,5QD412303

BMW/BENZ/Opel/Volvo/Porsche/Citroen

A2043210106, A2043210306, A2053211706, A2053211606, A2053211506, A2113230444, A2123210106, A2123210306, A1563210006, A2013232044, E4-AP2-Z075A0,A2133211200, A4473211106, A1673210306, LROO1144, LR001137, LR061353, LR121033, T4N12627, T4N7370, A2133211200, A4473211106, A6393240206

Honda/Toyoda/Lexus/Mazda/ Mitsubishi

48341-30130,48341-30130,48341-48050,48331-12220,48341-32053,52722-SS0-003,52722-SWA-A01,51722-SFE-003,51722-SV4-004,51722-SAA-E02,20371-FC000,48331-AB010,MR961189,54050HV10A,51722-SWA-A01,54626-4H000,54626-A9000,55326-D3000,44318-34000,551513E000,55326-1M000,54626-3X000