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2000 Mitsubishi Diamante Recalls, Problems & Maintenance

The 2000 Mitsubishi Diamante has no open NHTSA recalls. Owners report 6 recurring issue clusters, led by “Heater core leak with coolant odor and window fogging.” Mitsubishi publishes short, conservative intervals: oil every 7,500 miles normal / 3,750 severe, and — unlike many rivals — an explicit CVT fluid replacement schedule rather than a 'lifetime fill' claim. Read the severe-service column honestly: stop-and-go city trips, short hops, and hot climates all qualify, and they describe how most Mirages actually live. The 10-year/100,000-mile powertrain warranty stays intact only with documented on-schedule service.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2000 Mitsubishi Diamante.

Reported to NHTSA

Heater core leak with coolant odor and window fogging

VISIBILITY

27 NHTSA complaints · 2002-02 → 2008-09

“HEATING CORE IS LEAKING ANTIFREEZE ONTO OTHER COMPONENTS UNDER THE DASH; STRONG SMELL OF ANTIFREEZE WITHIN THE CAR; WINDOWS FOG UP UPON USING ANY OF THE VENTILATION SYSTEMS”
— Owner report, NHTSA ODI #10142024
“STRONG ANTIFREEZE SMELL AND VAPORS COMING THROUGH THE VENTS. ESPECIALLY WHEN THE HEATER IS TURNED ON. WINDOWS ARE FOGGING CONSTANTLY”
— Owner report, NHTSA ODI #10102415
“DEALERSHIP INDICATED THIS WAS CAUSED BY A PROBLEM WITH THE HEATER CORE GASKET, AND NEEDED TO BE REPLACED. THE ENTIRE DASHBOARD HAS TO BE TAKEN APART TO REPLACE THE PART”
— Owner report, NHTSA ODI #10095309

Read all complaints on NHTSA →

Accelerator pedal sticking or delayed throttle response

VEHICLE SPEED CONTROL

3 NHTSA complaints · 2004-10 → 2010-04

“2000 DIAMANTE MALFUNCTION, ESPECIALLY IN COLD OR WET WEATHER GAS PEDAL STICKS, REQUIRES ADDITIONAL PRESSURE TO OVERCOME”
— Owner report, NHTSA ODI #10099120
“SO I PRESS DOWN FURTHER ON THE GAS PEDAL, AND SUDDENLY THE CAR LURCHES FORWARD OUT OF CONTROL”
— Owner report, NHTSA ODI #10308600
“THE REPRESENTATIVE STATED THE THROTTLE CABLE NEEDED TO BE ADJUSTED AND SUGGESTED THE CONSUMER TAKE THE VEHICLE TO THE DEALER”
— Owner report, NHTSA ODI #10324254

Read all complaints on NHTSA →

Fuel tank venting noise and fuel leakage

FUEL SYSTEM, GASOLINE

3 NHTSA complaints · 2001-04 → 2005-06

“A BOOM NOISE HAS BEEN COMING FROM FUEL PUMP. VEHICLE HAS BEEN IN 7 TIMES WITH NO REMEDY FOUND”
— Owner report, NHTSA ODI #886963
“MY GAS TANK DOES NOT VENT PROPERLY - THE CAR HAS A DETINATION PROBLEM AND HAS EXPLODED ON FOUR OCCATIONS WITH A FORCE THAT ROCKS THE CAR”
— Owner report, NHTSA ODI #747471
“DT: CONSUMER HAS 2000 MITSUBISHI DIAMANTE WHOSE GAS TANK LEAKS CONSUMER TOOK VEHICLE TO DEALER, AND DEALER FOUND GAS LEAKAGE, BUT COULD NOT FIND ANY HOLE IN THE GAS TANK”
— Owner report, NHTSA ODI #10124671

Read all complaints on NHTSA →

Engine stall during right turns with loss of power assist

FUEL SYSTEM, GASOLINE

4 NHTSA complaints · 2001-12 → 2003-06

“WHILE MAKING A RIGHT TURN (IN PARTIVULARLY OFF A MAJOR HIGHWAY) THE CAR WILSTALL - NO POWER, BRAKES, OR POWER STEERING”
— Owner report, NHTSA ODI #757068
“WITH ABOUT < TANK OF GAS IN THE CAR, A HARD RIGHT TURN OR EXIT OFF THE EXPRESSWAYS, CAUSES THE CAR TO COMPLETELY STALL  NO POWER STEERING, BRAKES, NO ACCELERATION”
— Owner report, NHTSA ODI #755964
“INTERMITTENT WHEN MAKING RIGHT TURNS VEHICLE STALL DEALER HAS BEEN CONTACTED”
— Owner report, NHTSA ODI #10006062

Read all complaints on NHTSA →

Air bags not deploying in frontal collisions

AIR BAGS

2 NHTSA complaints · 2000-11 → 2001-04

“DRIVER REAR ENDED ANOTHER VEHICLE AT 30 TO 35MPH, AND NEITHER DRIVER'S SIDE NOR PASSENGER'S SIDE AIRBAGS DEPLOYED”
— Owner report, NHTSA ODI #874435
“NEITHER AIRBAG DEPLOYED. THE DRIVER AIRBAG APPEARS TO HAVE BEGUN TO DEPLOY, BUT DID NOT”
— Owner report, NHTSA ODI #744537

Read all complaints on NHTSA →

ABS warning light and brake system malfunction

SERVICE BRAKES, HYDRAULIC

3 NHTSA complaints · 2003-01 → 2004-01

“WHILE DRIVING ABS LIGHT ILLUMINATED AND THE BRAKES FAILED. VEHICLE WAS TOWED TO THE DEALER, WHO DETERMINED THAT THE ABS CHIP MALFUNCTIONED, AND HAD TO BE REPLACED”
— Owner report, NHTSA ODI #10050124
“THE VEHICLE WAS EXPERIENCING PROBLEMS WITH THE BRAKES”
— Owner report, NHTSA ODI #10003968
“AFTER THE FIRST COUPLE OF THOUSAND MILES WE NOTICED A &#34;PULSING&#34; FEELING IN THE BRAKES AS WELL AS AN INTERMITTENT ABS WARNING”
— Owner report, NHTSA ODI #10069914

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil & Filter

Every 7,500 mi

Replace every 7,500 miles normal / 3,750 severe. Mirage's 1.2L three-cylinder holds barely over 3 quarts — small sumps punish stretched intervals. 0W-20 on most recent models.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

CVT Fluid

Every 60,000 mi

Mitsubishi schedules CVT fluid replacement — commonly every 60,000 miles normal / 30,000 severe (check your year's table). Use only the specified CVT fluid (J4/CVTF-J4 family); generic ATF destroys the belt-and-pulley unit.

Estimated cost — typical U.S. ranges

Dealer

~$360–$500

Shop

~$255–$355

DIY

~$80–$180

CVT fluid is manufacturer-specific and pricey — do NOT substitute conventional ATF.

Tire Rotation

Every 7,500 mi

Rotate with every oil change. Light Mirages are easy on tires but the economy-focused OEM rubber wears fast when neglected.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 7,500 mi

Inspect pads, rotors/drums, and lines at each service — Mirage G4 retains rear drums, which need periodic adjustment checks.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 30,000 mi

Replace every 2-3 years per the schedule. Cheap job, big ABS-unit insurance.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Spark Plugs

Every 60,000 mi

Iridium plugs commonly every 60,000 miles on the Mirage's 3A92 and Lancer's 4B11 — verify your year's table, as some engines list up to 105,000.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Engine Air Filter

Every 15,000 mi

Mitsubishi's schedule replaces the engine air filter every 15,000 miles — shorter than most brands, and a 5-minute DIY on the Mirage.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Drive Belt

Every 60,000 mi

Inspect from 60,000 miles and replace on cracking. The Mirage's single serpentine belt also drives the A/C — a failure strands the car's accessories at once.

Estimated cost — typical U.S. ranges

Dealer

~$195–$235

Shop

~$135–$165

DIY

~$20–$50

DIY-friendly if you can reach the tensioner. Inspect for cracks rather than swap on a strict mileage interval.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Cabin Air Filter

Every 15,000 mi

Replace every 15,000 miles, behind the glovebox. Often skipped at quick-lube visits — worth checking if airflow feels weak.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Coolant Replacement

Every 60,000 mi

First change around 60,000 miles, then roughly every 30,000-45,000 per the schedule. Mitsubishi long-life coolant or equivalent OAT for your year.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Battery Test & Service

Every 25,000 mi

Test annually after year 3. Small-battery economy cars have little reserve — the first cold snap finds a weak one.

Estimated cost — typical U.S. ranges

Dealer

~$225–$390

Shop

~$160–$280

DIY

~$130–$250

Most auto-parts stores test and install batteries free with purchase. Skip the dealer markup.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

16 crashes 1990–2024

How the 16 occupant deaths break down

12

driver deaths

4

passenger deaths

16

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2001 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

3

complaints mentioning a crash

0

complaints mentioning a fire

Reviewed known issues for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2000 Mitsubishi Diamante reflects Mitsubishi's published service intervals. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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