![]() It’s clearly something to address, but not something that BMW sees as an immediate safety risk. To be clear, no spontaneous or unexpected loss of brake pressure is expected as a result of this defect. Low fluid volume could affect brake performance, thus increasing riders’ risk of crashing. After replacing a wheel cylinder, it is also important to bleed the brakes to remove any air in the brake. 102K views 4 years ago The brake caliper was leaking brake fluid on my Toyota Highlander so I replaced the brake caliper seal and cylinder piston boot. If you notice poor brake response, a soft brake pedal, or brake fluid leaking, check your wheel cylinder for damage. This may cause low braking pressure or a stuck piston. Over time, affected bikes could potentially have a reduced amount of brake fluid in their reservoirs. Over time, wheel cylinders can develop brake fluid leaks or corrode. ![]() If this is the case, affected vehicles no longer meet Federal Motor Vehicle Safety Standard (FMVSS) number 122, entitled “Motorcycle Brake Systems.” This fluid weeping is related to a small incompatibility between the inner seal and seal groove of affected brake calipers. The non-compliance report offers details that the front brake caliper on affected bikes may leak brake fluid when parked. You can just replace and bleed the brakes. If you are 100 sure that the bleed nipple is the issue. This has similar symtoms as getting oil on the pads. ![]() The following models are involved in this recall: There are other ways to leak oil: From a badly crushed olive in the hose connection Cracked piston Damaged piston seal And other issue could be 'pad glazing'. According to documents published by the National Highway Traffic Safety Administration (NHTSA), the problem potentially affects 9,392 individual motorcycles produced between Septemand March 13, 2020. ![]()
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