Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 0 complaints on file for the 1978 Peugeot 504 — too few to judge reliability from owner reports alone — but one recall campaign applies to this year, so any used example should have its VIN checked for completed recall work.
0
NHTSA complaints
1
Recalls
1
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
1 NHTSA recall campaign on file. Recall repairs are free at franchised dealers.
Defect
WATER COULD ACCUMULATE BETWEEN THE MOUNTING SURFACE OF THE BRAKE POWER BOOSTER UNIT AND THE FRONT SURFACE OF THE PEDAL SUPPORT BRACKET TO WHICH IT IS ATTACHED. AFTER A PERIOD OF TIME, THE WATER COULD CAUSE CORROSION, WHICH WOULD HINDER THE FREE MOVEMENT OF THE POWER BOOSTER PISTON IN ITS GUIDE CHANNEL.
Remedy
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE BRAKE POWER BOOSTER WITHOUT CHARGE TO OWNER.
The record is thin — 0 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 1 recall should be verified as completed.
Yes — NHTSA lists 1 recall campaign affecting the 1978 Peugeot 504. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
NHTSA opened one investigation into this model year; all are now closed.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.