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Engine coolingPart report

2004 Volkswagen Passat Engine cooling Problems

Complaints
59about this part
Share
21%of 279 total for the year
Median mileage
75,000miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 59 complaints about the engine cooling of the 2004 Volkswagen Passat, 21% of the 279 complaints for this model year. Where a mileage was given, the median is 75,000 miles. 5 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I began noticing a very strong smell of gasoline coming through the vent while driving. When I pulled over to check under the hood, I noticed that the rigid fuel line had cracked where it passed through a mounting bracket on the upper rear of the engine bay. The crack was emitting a steady flow of fuel onto the engine and exhaust manifold. We did not drive the car any further and had the line repaired with a patch of flexible fuel line material.”

NHTSA complaint #10626953, filed 2014-08, 166,000 miles

“The sludge problem that is common in Volkswagen 1.8 4 cylinder engines has happened to our car. The dealer has repaired the problem but Volkswagen refuses to honor the warranty even though we have jumped through every hoop they can think of. The last one is that they wanted the VIN number printed out on every oil change receipt.”

NHTSA complaint #10207035, filed 2007-10, 62,000 miles

“We have a 2002 and a 2004 Volkswagen Passat sedan and wagon. Both have suffered motor mount leakage and both have broken water pump dispellers. We have replaced the water pump parts and are saving up to replace mounts on both vehicles. This seems to be a weak part for Volkswagen. We are constantly going to get something fixed which is not a typical repair for automobiles from other companies.”

NHTSA complaint #10251963, filed 2008-12, 75,001 miles

“It never occurred to me that there was a problem with the engine...everytime I have the oil changed but it seems to be losing a little bit of oil. I need to add oil every 200 to 300 miles to the engine....I've checked for oil leaks..cant find any...please advise...rear seals? Maybe”

NHTSA complaint #10272831, filed 2009-06, 35,000 miles

“Incident description = 2004 vw Passat had been previously report several fuel consumptions problems at hoy fox vw and gas ended up leaking out of fuel tank and cause a spill in my garage and drive. Hazard was inhalation gas in a closed in area caused head aches/ nausea/dizziness/ for my family and I I have had mutiple problems with vehicle since then has broke down on me twice in less than 1 day's time. …”

NHTSA complaint #10244587, filed 2008-10, 55,999 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
202116%
202016%
201622%
201521%
201441%
201351%
201241%
200943%
200895%
20073212%
20066611%
20055034%
20045921%
200313121%
200213521%
20019221%
20009419%
19998613%
19983912%
1997719%
1996513%
19951920%
1994936%
19931826%
19921744%
1991625%
19901235%

Other parts of the 2004 Volkswagen Passat

Fuel system
57 complaints
Transmission and drivetrain
38 complaints
Seats
34 complaints
Electrical system
23 complaints
Engine
18 complaints
Exterior lighting
16 complaints
Body and structure
16 complaints
Brakes
15 complaints
Visibility (wipers, defrost, mirrors)
13 complaints
Other or unknown
9 complaints
Air bags
8 complaints
Tires
7 complaints

← All problems reported for the 2004 Volkswagen Passat

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology