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TOYOTA IQ Common Problems & Reliability

Based on 747 MOT tests from 48 vehicles analysed by VehicleScore. The figures below describe that VehicleScore sample. Recurring issues seen in VehicleScore MOT data are not a claim that every TOYOTA IQ has the same fault.

TOYOTA IQ's have a very good reliability rating of 695/999. The score was calculated from the average of every TOYOTA IQ that has had a registered MOT.

We calculated all of the below figures by getting the score from each vehicle make/model/year/fuel, which are each calculated a score. We then generate the average score, taking into account factors such as mileage and emissions.

Also check BHP & performance, road tax, fuel economy, and CO2 emissions for the TOYOTA IQ.

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Check a Toyota Iq before you buy

Enter your registration to see available vehicle history information including service records, MOT, mileage, write-off status, outstanding finance and more.

Toyota Iq side view
  • Service history

    Dealer & service records

  • MOT records

    Past & current MOT data

  • Write-off check

    Check for insurance write-offs

  • Finance check

    Outstanding finance & theft checks

Fuel TypeYearReliability ScoreAvg MileageSample Size
N/AN/A745/999Very good92,299 miles601 vehicles
N/AN/A721/999Very good85,438 miles1,287 vehicles
N/AN/A700/999Very good84,003 miles1,364 vehicles
N/AN/A674/999Good72,064 miles1,513 vehicles
N/AN/A635/999Good68,410 miles1,603 vehicles

How reliable is the TOYOTA IQ?

Based on 747 MOT tests from 48 vehicles analysed by VehicleScore.

Vehicles

48

MOT tests

747

Pass rate

83.4%

Median mileage

75,542 mi

Recurring issues seen in VehicleScore MOT data are inspection findings from this sample. They are not a statement that every TOYOTA IQ has the same fault. The median VehicleScore in this sample is 630 out of 999.

Common TOYOTA IQ MOT problems

These groups combine equivalent MOT comments, such as the same tyre note on different corners. Counts are comment occurrences in the sample, not a percentage of cars.

Tyre wear

VehicleScore MOT data includes 139 advisory comments and 6 failure comments in this group. Seen as both an advisory and a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record tyres that were worn, damaged, or close to the legal tread depth when the car was inspected.

What to inspect

Check the tread depth and look for uneven wear, cracking, or damage on all four tyres.

Example MOT wording: NEARSIDE REAR TYRE SLIGHTLY DAMAGED/CRACKING OR PERISHING (5.2.3 (D) (II))

Corrosion

VehicleScore MOT data includes 31 advisory comments and 7 failure comments in this group. Seen as both an advisory and a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record corrosion the tester could see on the body or structure. Corrosion already named on a spring, brake, or other component is counted with that component.

What to inspect

Inspect the underside, sills, and subframe for heavy corrosion, especially where an advisory mentions it.

Example MOT wording: FRONT SUB-FRAME CORRODED BUT NOT SERIOUSLY WEAKENED (5.3.3 (B) (I))

Coil spring issues

VehicleScore MOT data includes 35 advisory comments in this group. Seen mainly as an advisory. These are comment occurrences, not a share of all cars.

These MOT comments record coil springs that were corroded, fractured, or otherwise defective. They are counted separately from shock absorbers.

What to inspect

Look for a broken or heavily corroded spring and compare the ride height on both sides.

Example MOT wording: OFFSIDE REAR COIL SPRING CORRODED (5.3.1 (B) (I))

Brake pad wear

VehicleScore MOT data includes 27 advisory comments and 4 failure comments in this group. Seen as both an advisory and a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record brake pads that were worn or below the inspection limit.

What to inspect

Ask for recent pad replacement and look at the remaining pad thickness.

Example MOT wording: REAR BRAKE PAD(S) WEARING THIN (1.1.13 (A) (II))

Brake disc wear

VehicleScore MOT data includes 13 advisory comments and 3 failure comments in this group. Seen as both an advisory and a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record brake discs that were worn, scored, pitted, or corroded.

What to inspect

Look at the disc faces for deep scoring, a lip at the edge, and corrosion.

Example MOT wording: REAR BRAKE DISC WORN, PITTED OR SCORED, BUT NOT SERIOUSLY WEAKENED (1.1.14 (A) (II))

Lamp and bulb faults

VehicleScore MOT data includes 8 failure comments in this group. Seen mainly as a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record a lamp or bulb other than a headlamp or indicator.

What to inspect

Switch on the side, brake, fog, and number-plate lamps.

Example MOT wording: NEARSIDE FRONT POSITION LAMP NOT WORKING (4.2.1 (A) (II))

Windscreen damage

VehicleScore MOT data includes 8 failure comments in this group. Seen mainly as a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record chips, cracks, or other windscreen damage in the driver’s view.

What to inspect

Look for chips and cracks, especially in the area swept by the wipers.

Example MOT wording: NEARSIDE WINDSCREEN WIPER DOES NOT CLEAR THE WINDSCREEN EFFECTIVELY (3.4 (B) (II))

Engine warning lamp

VehicleScore MOT data includes 4 failure comments in this group. Seen mainly as a failure reason. These are comment occurrences, not a share of all cars.

These MOT comments record an engine warning lamp that was on, or did not work, during the inspection.

What to inspect

Switch on the ignition and confirm the lamp comes on and then goes out. Ask what was diagnosed if it stayed on.

Example MOT wording: ENGINE MIL INOPERATIVE OR INDICATES A MALFUNCTION (8.2.1.2 (H))

TOYOTA IQ MOT reliability by year

A model year is only commented on when VehicleScore has at least 5 vehicles from that year.

YearVehiclesMOT testsPass rateRecurring issues seen
201279687.5%Tyre wear, Brake disc wear
2011710385.4%Tyre wear, Brake pad wear
20101118880.3%Corrosion, Brake disc wear
20091831082.9%Tyre wear, Corrosion

What to check when buying a used TOYOTA IQ

This is an inspection checklist based on MOT comments in the VehicleScore sample. It does not mean the car you are looking at has these defects.

  • Tyre wear. Check the tread depth and look for uneven wear, cracking, or damage on all four tyres.

  • Corrosion. Inspect the underside, sills, and subframe for heavy corrosion, especially where an advisory mentions it.

  • Coil spring issues. Look for a broken or heavily corroded spring and compare the ride height on both sides.

  • Brake pad wear. Ask for recent pad replacement and look at the remaining pad thickness.

  • Brake disc wear. Look at the disc faces for deep scoring, a lip at the edge, and corrosion.

  • Lamp and bulb faults. Switch on the side, brake, fog, and number-plate lamps.

  • Windscreen damage. Look for chips and cracks, especially in the area swept by the wipers.

  • Engine warning lamp. Switch on the ignition and confirm the lamp comes on and then goes out. Ask what was diagnosed if it stayed on.

Buying a TOYOTA IQ?

Common problems tell you what can affect TOYOTA IQs generally. VehicleScore can check the history of the actual car you're considering.

Where does this data come from?

VehicleScore analyses MOT histories from vehicles in its own dataset. Sample sizes vary by model, and a small sample is labelled as such. MOT data records roadworthiness and inspection defects. It does not capture every mechanical or electronic problem a car can have, and a comment on one test is not proof that the model has an inherent fault.

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