1984 Volkswagen Quantum
Recalls, most-reported problems, crash-test ratings, fuel economy and what a 1984 Volkswagen Quantum is worth — from official NHTSA and EPA data. 1 on record.
1984 Volkswagen Quantum at a glance
Included: that car's specs and build sheet, model-year recall campaigns and a fair price.
1984 Volkswagen Quantum recalls 3
IDLE CONTROL UNIT MAY MALFUNCTION AND CAUSE IDLE STABLIZER VALVE TO BECOME ACTIVATED OUTSIDE ITS NORMAL OPERATING RANGE.
Fix: REPLACE IDLE CONTROL UNIT.
UNDER ADVERSE WEATHER CONDITIONS, OUTER RUBBER LAYER OF BRAKE HOSES MAY BECOME BRITTLE AND DEVELOP CRACKS. CONSEQUENCE OF DEFECT: CRACKS COULD LEAD TO LOSS OF BRAKE FLUID RESULTING IN AN INCREASE IN STOPPING DISTANCE AND POSSIBLY AN ACCIDENT.
Fix: REPLACE BRAKE HOSES AS NECESSARY.
REAR BRAKE DRUMS MAY CRACK IN SERVICE, DUE TO AN ERROR IN THE MANUFACTURING PROCESS.
Fix: UPON INSPECTION, DEALER WILL REPLACE BRAKE DRUMS, IF NECESSARY.
Source: U.S. NHTSA, checked 4 Nov 2026. A campaign covers the model year; to see whether a particular car still needs the repair, check its VIN on NHTSA.gov or ask a franchised dealer.
1984 Volkswagen Quantum common problems
The most-reported problem areas across all 9 owner complaints filed with NHTSA — and what to check before you buy.
1984 Volkswagen Quantum MPG & running costs
Source: U.S. EPA / DOE fueleconomy.gov. The EPA lists 10 versions of this model year; combined is shown as a range and the other figures are averages.
Estimated 5-year cost to own
A rough guide to what running a 1984 Volkswagen Quantum costs over five years and 75,000 miles.
How this is estimated: fuel is the U.S. EPA annual cost at 15,000 miles a year. There aren't enough comparable listings to estimate depreciation for this model, so it is left out. Not included: insurance, maintenance, repairs, taxes, registration and finance costs. Treat it as a comparison guide, not a quote.
Investigations & service bulletins
NHTSA defect investigations 1
1979-86 AUDI 4000 SUDDEN ACCELERATION Closed
1979-86 AUDI 4000 SUDDEN ACCELERATION
NHTSA #DP87002 · Vehicle Speed Control · opened Oct 1986 · closed Jun 1987An investigation means NHTSA is examining a possible defect — it is not a recall, and many close without one.
Source: NHTSA Office of Defects Investigation, listed for the QUANTUM. Model-year data, not specific to one car.
About the Volkswagen Quantum
The Volkswagen Passat (B2) is an automobile produced by German manufacturer Volkswagen from 1981 to 1988. It was the second generation of the Volkswagen Passat, the platform of which was slightly longer than that of the preceding Passat (B1). As with the previous generation, it was based on the platform of the Audi 80; the corresponding B2 version of which had already been launched in 1978. The Santana was also manufactured in China, Brazil, Mexico and Argentina. In Brazil, the Santana station wagon was sold as the Quantum. In the United States, both the Santana sedan and station wagon were sold as the Quantum. The Passat saloon and estate were produced in South Africa for their local market…
From Wikipedia, licensed CC BY-SA 4.0. Describes the model line in general, not this model year specifically.