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Toyota2004–2016 Major issues documented

Toyota Daihatsu Boon AC10: common faults & what to check

The AC10 is the Toyota Daihatsu Boon built 2004–2016. Of the 7 faults documented for the Daihatsu Boon, 7 apply to this generation, each with its symptoms, what to inspect and a typical repair cost. Free, no account needed.

Check this exact Toyota Daihatsu Boon

  • Odometer history
  • Money owing
  • Reported stolen
  • Ownership history
  • Official NZ vehicle register data
  • NZ owned and operated

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7

Documented faults

Major

Most serious

$250–$600

Typical repair

5

Systems covered

You're looking at the AC10

Everything below is narrowed to this variant. Pick a different one to change it.

Choose a different generation

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Which engine is in it? These cover every year of this model.

1.0L petrol (1KR-FE)· 1.0 litre petrol

A 2004 Toyota Daihatsu Boon is the AC10 generation (2004 to 2016).

We cannot narrow the engine list to this year, so every engine this model was sold with is offered.

Start your free check on this Toyota Daihatsu Boon

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Toyota Daihatsu Boon AC10

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Can't confirm for this car

Toyota Daihatsu Boon · 2004

Narrowed to the year. No engine is recorded for this vehicle. Pick an engine to see which faults apply.

Tell us the engine, or check the engine code on the car, before relying on this.

  • No engine is recorded for this vehicle.

matched on year only

What to look out for

The checks worth doing on a Toyota Daihatsu Boon before you hand over any money. Every documented fault is listed below, each with its own page.

  • Costly issue

    Inspect the boot for splitting.

    See why

    Front Lower Arm Ball Joint Wear

    Front lower arm ball joints wear causing clunking and handling imprecision.

    What you would notice

    • Clunking from front suspension over bumps
    • Imprecise handling feel when cornering

    Typically $250–$600 to put right.

  • Costly issue

    Check for pulling under braking.

    See why

    Brake Caliper Guide Pin Seizure

    Front brake caliper guide pins seize from corrosion causing uneven pad wear.

    What you would notice

    • Vehicle pulling to one side under braking
    • One front disc hotter than the other after moderate use

    Typically $150–$500 to put right.

  • Costly issue

    Scan for EPS fault codes.

    See why

    Electric Power Steering Column Motor Failure

    EPS column motor fails causing sudden or gradual loss of power assistance.

    What you would notice

    • Sudden loss of power steering with EPS warning light
    • Heavy steering requiring effort especially at low speeds

    Typically $600–$2,000 to put right.

  • Common issue

    Turn the steering wheel slowly from lock to lock — clunking at the same steering angle indicates worn top mount bearings.

    See why

    Front Strut Top Mount Bearing Clunking

    Front strut top mount bearings wear causing clunking when turning the steering wheel on this small car.

    What you would notice

    • Clunking from front struts when turning or over bumps
    • Clunking repeatable at the same steering angle each sweep

    Typically $250–$600 to put right.

See all 7 issues for this oneDocumented for the exact year and engine you picked.
Electrical1

01Electric Power Steering Column Motor Failure

Scan for EPS fault codes.2004–2016Electrical
OccasionalElectrical $600–$2,000 to fix

EPS column motor fails causing sudden or gradual loss of power assistance.

Symptoms to notice

  • Sudden loss of power steering with EPS warning light
  • Heavy steering requiring effort especially at low speeds

What to check

  1. Scan for EPS fault codes.
  2. Test steering — heavy or inconsistent feel warrants investigation.

Where to look: EPS column motor and control unit

Parts involved: Steering rack.

Ask the seller

  • “Has the electric power steering column motor been inspected or repaired?”
Body, brakes, suspension & interior3

02Front Lower Arm Ball Joint Wear

Inspect the boot for splitting.2004–2016Suspension
CommonSuspension $250–$600 to fix

Front lower arm ball joints wear causing clunking and handling imprecision.

The front wheel of a car splayed outward with the lower control arm hanging down after a ball joint separation.Example of the part — not this vehicle

A separated lower ball joint: the control arm has dropped and the wheel has splayed out under the guard.

Elfix · CC0 · Wikimedia Commons

Symptoms to notice

  • Clunking from front suspension over bumps
  • Imprecise handling feel when cornering

What to check

Inspect the boot for splitting. If a workshop inspection is possible: With vehicle raised, lever the lower arm and check for ball joint play.

Where to look: Front lower suspension control arms

Parts involved: Ball joint.

Ask the seller

  • “Has the front lower arm ball joint been inspected or repaired?”

03Brake Caliper Guide Pin Seizure

Check for pulling under braking.2004–2016Brakes
CommonBrakes $150–$500 to fix

Front brake caliper guide pins seize from corrosion causing uneven pad wear.

Symptoms to notice

  • Vehicle pulling to one side under braking
  • One front disc hotter than the other after moderate use

What to check

  1. Check for pulling under braking.
  2. Feel for uneven wheel heat.
  3. Inspect guide pins.

Where to look: Front brake calipers

Parts involved: Brake disc and pads.

Ask the seller

  • “Has the brake caliper guide pin seizure been inspected or repaired?”

04Front Strut Top Mount Bearing Clunking

Turn the steering wheel slowly from lock to lock — clunking at the same steering angle indicates worn top mount bearings.2004–2016Suspension
CommonSuspension $250–$600 to fix

Front strut top mount bearings wear causing clunking when turning the steering wheel on this small car.

Symptoms to notice

  • Clunking from front struts when turning or over bumps
  • Clunking repeatable at the same steering angle each sweep

What to check

Turn the steering wheel slowly from lock to lock — clunking at the same steering angle indicates worn top mount bearings.

Where to look: Front strut top mount bearings both sides

Parts involved: Shock absorber / strut.

Ask the seller

  • “Has the front strut top mount bearing been inspected or repaired?”
Depends on the exact engine — 3 moreDocumented for a specific engine we could not confirm from what you picked. Check the engine code on the car.
Engine, transmission & cooling3

011KR-FE Valve Stem Seal Oil Consumption

Check oil level and note consumption rate.petrol2004–2016Engine
CommonEngine $500–$1,500 to fix

Can't confirm for this car

The Toyota Passo KGC10/KGC30 1KR-FE 1.0 engine consumes oil from worn valve stem seals on high-mileage examples, producing blue smoke from the exhaust on startup after an overnight park. The small oil capacity of the 1KR-FE means even moderate valve stem seal leakage causes noticeable oil level drops between services.

Symptoms to notice

  • Blue smoke from exhaust on startup and deceleration
  • Frequent oil top-ups needed between regular service intervals

What to check

  1. Check oil level and note consumption rate.
  2. Blue smoke from exhaust on startup after overnight park indicates valve stem seal wear.
  3. Check that oil level has not dropped significantly between standard service intervals.

Where to look: 1KR-FE cylinder head valve stem seals and valve guides

Ask the seller

  • “Has the 1kr-fe valve stem seal oil been inspected or repaired?”

02Throttle Body Carbon Fouling

Inspect throttle body bore for grey-black carbon deposits.petrol2004–2016Engine
CommonEngine $80–$300 to fix

Can't confirm for this car

1KR-FE throttle body butterfly and bore accumulate carbon causing rough idle and hesitation.

Symptoms to notice

  • Rough idle and hesitation from rest at light throttle
  • Occasional stalling when releasing throttle in traffic

What to check

  1. Inspect throttle body bore for grey-black carbon deposits.
  2. Note rough idle and hesitation.

Where to look: Throttle body on intake manifold

Ask the seller

  • “Has the throttle body carbon fouling been inspected or repaired?”

03CVT K110 Belt Judder on Automatic

Test drive and feel for rhythmic vibration during light acceleration from rest.petrol2004–2016Transmission
Very commonTransmission $600–$3,500 to fix

Can't confirm for this car

The Toyota Passo K110 CVT develops shudder from belt and pulley wear on urban short-trip examples. Toyota CVTF FE specification must be used — incorrect fluid accelerates belt degradation.

Symptoms to notice

  • Rhythmic shudder or buzz during light acceleration from rest
  • CVT fluid darker than the correct clear pink Toyota CVTF FE specification

What to check

Test drive and feel for rhythmic vibration during light acceleration from rest. CVT fluid darker than the correct clear pink indicates degraded fluid.

Where to look: CVT gearbox in engine bay

Ask the seller

  • “Has the cvt k110 belt judder on been inspected or repaired?”

What these repairs cost on other cars

Some of the Toyota Daihatsu Boon’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

Other Toyota models

Toyota Prado64 documented faultsToyota RAV463 documented faultsToyota Hilux60 documented faultsToyota Funcargo7 documented faultsToyota MR-S7 documented faultsToyota Tacoma7 documented faults

Toyota Daihatsu Boon buyer questions

Is the Toyota Daihatsu Boon reliable?

Like any used car, it depends on the specific example and its service history. Across the 7 documented faults for the Toyota Daihatsu Boon, the recurring problem areas are transmission, electrical, and engine. A Toyota Daihatsu Boon with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.

What are the most common problems with a used Toyota Daihatsu Boon?

We've catalogued 7 known faults for the Toyota Daihatsu Boon, covering transmission, electrical, and engine. All 7 are written out in full on this page, with the symptoms to notice, what to inspect, and typical repair costs for each. Free to read, no account needed.

How much do repairs cost on a Toyota Daihatsu Boon?

Most single repairs on the Toyota Daihatsu Boon fall between $250–$600 at NZ independent-workshop rates. Some of the 7 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.

Should I get a pre-purchase inspection on a Toyota Daihatsu Boon?

Yes. A Toyota Daihatsu Boon inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $24.90 far less than the cost of missing one of the faults on this page.