1999 Audi A4 Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip Problems

NHTSA component category: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP · data through 07/12/2026

43Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip complaints

22.6%Of all 190 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How service brakes, hydraulic:antilock/traction control/electronic limited slip ranks on this vehicle

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP43 · 22.6%

VEHICLE SPEED CONTROL14 · 7.4%

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE14 · 7.4%

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS12 · 6.3%

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC10 · 5.3%

Share of the 190 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 Audi A4 overview page.

What owners report

“THE CONSUMER STATES THAT THE VEHICLES LEFT REAR BRAKES FAILED. ALSO STATES THAT THE VEHICLE OFTEN FAILED TO STOP DURING WET CONDITIONS, THE CONSUMER WILL…”NHTSA complaint 10001368 — filed 01/06/2003

“MY 1999 AUDI A4 EXPERIENCES DELAYED BRAKING DURING PERIODS OF MODERATE TO HEAVY RAIN.”NHTSA complaint 757574 — filed 01/31/2002

“THERE HAS ALWAYS BEEN A PROBLEM WITH THE BRAKING PERFORMANCE OF THIS VEHICLE DURING WET CONDITIONS. THIS IS ONLY DURING HIGHWAY OR COUNTRY DRIVING WHERE…”NHTSA complaint 755262 — filed 12/04/2001

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip complaints by year filed

Frequently asked questions

Does the 1999 Audi A4 have service brakes, hydraulic:antilock/traction control/electronic limited slip problems?

Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip is the most-reported problem area on the 1999 Audi A4: 43 of 190 complaints on file (22.6%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 1999 Audi A4 have in total?

190 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 9 involved a crash, 2 involved a fire, 5 reported injuries, and none reported deaths.

What does NHTSA's service brakes, hydraulic:antilock/traction control/electronic limited slip category include?

NHTSA assigns each complaint to standard component categories; this page reports the SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.