ENGINE STALLING - FUEL PUMP FAILURE

What NHTSA is examining

In response to odi's information request for pe08-027, volkswagen ag (vw) stated that it believes that the possible causal or contributory factors of the alleged defect in the subject vehicles could result from excessive accumulation of foreign materials in the fuel filter.in rare cases, the fuel filter could become clogged, which can cause increased pressure on the pump.vw indicated that engine stalls resulting from this condition are rare and would be preceded by symptoms such as reduced engine power, noise or hesitation.odi's analysis of complaint and warranty data determined that the rate of engine stall incidents resulting from fuel pump failure is low at approximately 0.2 percent after three years in service. On january 17, 2006, vw submitted a defect information report to odi concerning a safety recall to address a defect in the fuel pumps of approximately 74,000 model year (my) 2003 volkswagen passat (47,000), audi a4 (20,000) and audi a6 (7,000) vehicles built from september 2002 through march 2003 (nhtsa recall no. 06v-017, vw recall nos. M7 for passat and jl for audi a4 and a6).according to vw, a sub-supplier experienced an unknown change in the material composition of the carbon-brush set used in the electric motor in the fuel pump, which could lead to increased wear of the carbon-brush sets, which in turn can lead to an inoperative fuel pump and, ultimately, stoppage of fuel supply to the engine.on july 23, 2007, vw expanded the scope of the recall to include…

Vehicles under investigation