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Research · Compact Cars

2004 Kia RioRecalls, problems, MPG & safety

NHTSA lists 2 safety recalls and 50 owner complaints for the 2004 Kia Rio. Most complaints involve engine and engine cooling (14) and suspension (8). The EPA rates it 24–26 mpg combined.

Check a VINAdd to my garage
Combined MPG
24–26mpg
EPA · 4 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
2campaigns
Latest Dec 2005
Owner complaints
50
Top: engine and engine cooling
Fuel cost / yr
$2,450est.
EPA estimate, best version
01 —Recalls

Safety recalls

2 NHTSA campaigns · applies to some vehicles, check your VIN

Child seat

Free remedy

CERTAIN PASSENGER VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, 'CHILD RESTRAINT ANCHORAGE SYSTEMS.' CERTAIN CHILD RESTRAINT ANCHORS WILL NOT FULLY LATCH ONTO THE LOWER LATCH ANCHORS LOCATED BETWEEN THE REAR SEAT BACK AND REAR SEAT CUSHION BECAUSE OF INTERFERENCE BETWEEN THE CHILD SEAT ANCHORS AND A METAL WIRE LOCATED IN THE FRAME OF THE REAR SEAT BACK. UNTIL THE RECALL REPAIR IS COMPLETED, FOLLOW THE INSTRUCTIONS PROVIDED BY YOUR CHILD SEATS MANUFACTURER ON HOW TO PROPERLY INSTALL THE CHILD SEAT WITH YOUR VEHICLE'S REAR SAFETY BELTS RATHER THAN USING THE LATCH SYSTEM.

Child seatReported Dec 12, 2005NHTSA 05V557000

Fuel system

Free remedy

ON CERTAIN PASSENGER VEHICLES, THE FUEL INTAKE NIPPLE OF THE FUEL DISTRIBUTOR IS SUBJECT TO FRACTURE OR CRACKING DURING REMOVAL OF THE QUICK CONNECT COUPLING SECURING THE MAIN FUEL TUBE ASSEMBLY TO THE FUEL INTAKE NIPPLE, OR WHEN FORCE IS ACCIDENTALLY APPLIED TO THE INTAKE NIPPLE DURING THE VEHICLE ASSEMBLY PROCESS OR DURING ENGINE COMPARTMENT REPAIRS.

Fuel system, gasolineReported Apr 9, 2004NHTSA 04V179000
Data from NHTSA Recalls API · synced Oct 28, 2026 · All recall detailsNHTSA vehicle page
02 —Complaints

Owner complaints by component

50 complaints filed with NHTSA · Apr 2004 – Mar 2024
  1. Engine and engine cooling14
  2. Suspension8
  3. Power train7
  4. Electrical system6
  5. Fuel system, gasoline6
  6. Service brakes, hydraulic4
  7. Vehicle speed control4
  8. Structure3
  9. Air bags3

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

By model year

Complaints for each Rio model year we’ve synced.

View as table
Model yearNHTSA complaints
2001224
2002152
200384
200450
200537
200674
200746
200849
200941
201026
201124
201254
2013153
201452
201552
201679
201731
201828
201922
202027
202115
202212
202312
Crashes reported
5
Fires reported
2
Injuries reported
2
Deaths reported
0
Data from NHTSA Complaints API · synced Oct 28, 2026 · Full problem breakdownNHTSA vehicle page
03 —Common problems

What owners report most

Verbatim excerpts from NHTSA complaints, by component

Engine and engine cooling

14 reports
“I WAS AT A STOP SIGN AND MY 2004 KIA RIO DIED , I PUSHED IT TO THE MECHANIC AND WAS TOLD THE TIMING BELT LOST ITS TEETH AND THERE IS NOW NO COMPRESSION IN 3 AND 4 , THE MILEAGE ON CAR IS 68040. I WAS TOLD BASICALLY THE ENGINE IS TOAST AND I WASN'T EVEN MOVING ,I WAS TOLD BY A COUPLE OF MECHANICS THAT THE BELT THAT KIA USED IS FAULTY . THE OWNERS MANUAL SAYS REPLACE 60,000 MILES BUT REPLACE IT 105,000 IN CALIFORNIA. HOW WOULD A BELT BE BAD IN 49 STATES EXCEPT CALIFORNIA. I FOUND ON AUTO MD .COM NHTSA ACTION #10015272 SERVICE BULLETIN # 289221 REPORT DATING JAN 1 2005 IMPROVED TIMING BELTS FOR 04 RIO AND OPTIMA . *TR”
Owner complaint to NHTSAFiled Dec 5, 2010Engine and engine coolingODI 10369219

Suspension

8 reports
“TL* THE CONTACT OWNS A 2004 KIA RIO. WHILE DRIVING VARIOUS SPEEDS, THERE WAS AN ABNORMAL NOISE UNDERNEATH THE VEHICLE. THE VEHICLE WAS TAKEN TO MULTIPLE INDEPENDENT MECHANICS AND A DEALER ON NUMEROUS OCCASIONS WHERE IT WAS DIAGNOSED THAT THE FRONT DRIVER SIDE WHEEL BEARING NEEDED TO REPLACED. THE WHEEL BEARING WAS REPLACED MULTIPLE TIMES; HOWEVER, THE FAILURE PERSISTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.”
Owner complaint to NHTSAFiled Aug 22, 2016SuspensionODI 10897541

Power train

7 reports
“VEHICLE WAS PURCHASED USED APPROXIMATELY 2 YEARS AGO. ON THE APPROXIMATE INCIDENT DATE, THE CLUTCH PEDAL FAILED TO ACTUATE THE CLUTCH AFTER PRODUCING A LOUD NOISE. INSPECTION AT A REPAIR FACILITY REVEALED FAILURE IN SEVERAL CLUTCH COMPONENTS AND A METAL FATIGUE FAILURE IN THE CLUTCH AND BRAKE PEDAL SUPPORT BRACKET. I AM FILING THIS COMPLAINT ON BEHALF OF MY DAUGHTER FOR THE FAILED SUPPORT BRACKET, WHICH I HAVE IN MY POSSESSION.”
Owner complaint to NHTSAFiled Jan 15, 2012Power trainODI 10443859
All 2004 Rio problemsSend a problem to a mechanic on findmechanic.ai
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026
04 —Key specs

Engines, transmissions & drive

4 versions rated by the EPA
EPA class
Compact Cars
Engines
1.6L 4-cyl
Transmissions
Manual 5-spd · Automatic 4-spd
Drive
Front-Wheel Drive
Fuel
Regular Gasoline

Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.

Data from EPA fueleconomy.gov · synced Oct 28, 2026EPA listing
05 —Fuel economy

EPA fuel economy by version

City / highway / combined, annual fuel cost and CO₂
EPA
VersionCityHwyComb.Fuel / yrCO₂ g/mi
Rio
Man 5-spd, 4 cyl, 1.6 L · Front-Wheel Drive
233026$2,450342
Rio
Auto 4-spd, 4 cyl, 1.6 L, CLKUP · Front-Wheel Drive
223025$2,550355
Rio
Man 5-spd, 4 cyl, 1.6 L · Front-Wheel Drive
222925$2,550355
Rio
Auto 4-spd, 4 cyl, 1.6 L, CLKUP · Front-Wheel Drive
212924$2,700370
  • Rio
    Man 5-spd, 4 cyl, 1.6 L
    23 city · 30 hwy · $2,450/yr
    26
    mpg comb.
  • Rio
    Auto 4-spd, 4 cyl, 1.6 L, CLKUP
    22 city · 30 hwy · $2,550/yr
    25
    mpg comb.
  • Rio
    Man 5-spd, 4 cyl, 1.6 L
    22 city · 29 hwy · $2,550/yr
    25
    mpg comb.
  • Rio
    Auto 4-spd, 4 cyl, 1.6 L, CLKUP
    21 city · 29 hwy · $2,700/yr
    24
    mpg comb.
Estimate your fuel costCost of ownership
Data from EPA fueleconomy.gov · synced Oct 28, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
06 —Safety

NHTSA 5-Star Safety Ratings

2 tested variants
NHTSA has not published 5-Star Safety Ratings for the 2004 Kia Rio as of Oct 28, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Oct 28, 2026Vehicle 1182Vehicle 1181
07 —Maintenance

Maintenance basics

General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
ItemMilesTimeNote
Engine oil & filter5,000–10,000 mi6–12 monthsFollow the oil-life monitor if fitted
Tire rotation5,000–7,500 miEvery oil changeCheck pressure monthly
Engine air filter15,000–30,000 mi1–2 yearsSooner in dusty areas
Cabin air filter15,000–25,000 mi1–2 years
Brake fluid—2–3 yearsAbsorbs moisture over time
Coolant60,000–100,000 mi5–10 yearsLong-life coolants last longer
Spark plugs60,000–100,000 mi—Iridium/platinum plugs at the long end
12V battery—3–5 yearsHeat shortens battery life
  • Engine oil & filter5,000–10,000 mi
    6–12 months
  • Tire rotation5,000–7,500 mi
    Every oil change
  • Engine air filter15,000–30,000 mi
    1–2 years
  • Cabin air filter15,000–25,000 mi
    1–2 years
  • Brake fluid—
    2–3 years
  • Coolant60,000–100,000 mi
    5–10 years
  • Spark plugs60,000–100,000 mi
    —
  • 12V battery—
    3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
09 —FAQ

2004 Rio questions

How many recalls does the 2004 Kia Rio have?

2 safety recalls as of Oct 28, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.

What are the most common 2004 Kia Rio problems?

Owners filed 50 complaints with NHTSA. The most-cited components are engine and engine cooling (14), suspension (8), power train (7). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.

What MPG does the 2004 Kia Rio get?

The EPA rates the 2004 Kia Rio at 24–26 mpg combined, depending on engine and drivetrain (4 versions rated).

Data from NHTSA & EPA · synced Oct 28, 2026