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

1J0512131B,357412303F,3B0512131H,191512131B,6Q0512131C,4B0512131B,6N0512131A,5Q0511357H,5Q0511357G,2K0511155A

BMW/BENZ/Opel/Volvo/Porsche/Citroen

2043230044,6383210506,13367145,5033.A3,7L5511149,A2463210206,A6383210506,2043210006,1643230044,95B412131D,95B512131D,971512131B,98733330101

Honda/Toyoda/Lexus/Mazda/ Mitsubishi

D651-34-111A,KD35-34-111,MB-809285,48331-33020,48331-12120B,C100-28-111,51722-S10-004,48331-33071,52722-SR3-003

Chevrolet/Fiat/Jeep/Chrysler/Dodge

97KB-5K570-BA, 05171137AB,13356026,1388271,96396591,51755690,1531648,5166.90,96626336,95214399,96586890,13384157,GM23284102