Honda Zest: common faults & what to check

Which Honda Zest are you looking at?

3 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Engine not documented

3 variants documented

1998–2003JB11998–2003JB1Engine not documented for this generationEngine not documentedDocumented issues0 knownSee faults & what to checkPhoto: 天然ガス via Wikimedia Commons, CC BY-SA 3.0.

2003–2008JB52003–2008JB5Engine not documented for this generationEngine not documentedDocumented issues0 knownSee faults & what to checkPhoto: Hatsukari715 via Wikimedia Commons, Public domain.

2008–2014JC12008–2014JC1Engine not documented for this generationEngine not documentedDocumented issues6 knownSee faults & what to checkPhoto: Mr.choppers via Wikimedia Commons, CC BY-SA 4.0.

Start your free check on this Honda Zest

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

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

• Serious issue

  Check for blue-grey exhaust smoke at idle and under boost.

  See why

  P07A Turbo Oil Feed Line Clogging and Turbocharger Failure

  The P07A 0.66-litre turbocharged engine uses a narrow oil feed banjo bolt orifice to the turbocharger centre bearing. Sludge accumulation from extended oil change intervals or short-trip operation partially or fully blocks this orifice, starving the turbo of lubrication and causing catastrophic bearing and compressor wheel failure. The failure mode is progressive: early-stage restriction produces bearing noise at startup; full blockage destroys the turbo within minutes of cold start.

  What you would notice

  • High-pitched whining or grinding noise from the turbocharger at startup or under load
  • Blue-grey oil smoke from the exhaust, particularly on cold start or following a trailing-throttle overrun
  • Loss of boost pressure and noticeable power reduction above 3,000 rpm
  • Oil contamination visible inside the intake pipe between intercooler and throttle body

  Typically $1,200–$3,200 to put right.

• Costly issue

  Lift and support the vehicle.

  See why

  Front Lower Control Arm Ball Joint Wear

  The front suspension on the Zest JH1/JH2 uses a MacPherson strut arrangement with a pressed-in lower ball joint on the aluminium lower control arm. The ball joint socket wears and develops play, causing steering wander and a clunking noise over bumps. Because the ball joint is integral to the arm on many variants, worn units require replacement of the complete lower arm assembly rather than just the joint.

  What you would notice

  • Clunking or knocking noise from the front suspension when traversing speed bumps, pot-holes, or uneven road surfaces
  • Steering wander or vague straight-line tracking, requiring constant correction
  • Vibration felt through the steering wheel at low speeds on rough surfaces
  • Uneven inner tyre wear on the front axle

  Typically $350–$900 to put right.

• Costly issue

  Attempt to slide each caliper by hand with the pin bolts loosened — a seized pin will resist lateral movement.

  See why

  Brake Caliper Guide Pin Seizure

  The front and rear brake calipers on the Zest use sliding-pin designs in which the caliper body floats on two steel guide pins to allow self-centring against the disc. The guide pin rubber boots deteriorate and split, allowing water and road contamination to enter and corrode the pins within the aluminium caliper brackets. Seized guide pins prevent the caliper from retracting fully after brake application, causing the outer brake pad to drag against the disc continuously, generating heat, premature pad and disc wear, and a pulling sensation under braking.

  What you would notice

  • Vehicle pulling to one side under moderate or heavy braking
  • Uneven brake pad wear, with the outer pad significantly thinner than the inner pad on the same corner
  • Persistent brake drag or wheel warmth after driving, with one wheel noticeably hotter than the other
  • Squealing or grinding noise from one corner during and after braking

  Typically $150–$650 to put right.

• Costly issue

  Start the engine and check that the EPS warning lamp extinguishes within two seconds.

  See why

  Electric Power Steering Motor and Control Unit Failure

  The Zest uses a column-type electric power steering (EPS) system in which the assist motor is mounted on the steering column rather than at the rack. The motor brushes, worm gear, and the EPS electronic control unit are known failure points; the control unit is particularly susceptible to capacitor degradation from heat cycling over time. Failure typically presents as complete or intermittent loss of power assistance, illumination of the EPS warning lamp, and occasional self-steering pull to one side when the control unit outputs incorrect torque commands.

  What you would notice

  • EPS warning indicator lamp illuminating on the dashboard, either continuously or intermittently
  • Sudden increase in steering effort, as if power assistance has been removed entirely
  • Intermittent self-steer or pull to one side during straight-line driving
  • Grinding or clicking noise from the steering column at low steering speeds

  Typically $600–$1,800 to put right.

• Common issue

  Check for stored DTC codes P0505 (idle control system malfunction) or P0507 (idle control RPM high).

  See why

  Idle Air Control Valve Carbon Fouling Causing Rough Idle

  The P06A and P07A engines use an idle air control valve (IACV) mounted on the throttle body to regulate bypass airflow and maintain a stable idle speed under varying accessory loads. Short-trip operation and oil vapour from the crankcase ventilation system deposit carbon on the IACV pintle and port, restricting bypass airflow. The result is an unstable or low idle at operating temperature, stalling when coming to a stop, and hesitation when air conditioning is switched on or off.

  What you would notice

  • Rough, hunting, or low idle at normal operating temperature, particularly with accessories such as air conditioning engaged
  • Engine stalling when braking to a stop or when the transmission selector is moved to Drive from Park
  • Hesitation or stumble immediately after the air conditioning compressor engages
  • Stored OBD-II DTC codes P0505 or P0507 relating to the idle control system

  Typically $80–$350 to put right.

• Worth checking

  Operate the power sliding door through its full open and close cycle and listen for hesitation, grinding, or motor strain.

  See why

  Power Sliding Door Cable Fraying and Drive Motor Failure (Zest Spark)

  The Zest Spark variant is equipped with a power sliding door system using a single Bowden-style cable driven by a small electric motor mounted in the door track channel. The cable sheath cracks and the inner wire frays at the radius bends in the door channel over time, particularly in the upper guide rail section. Fraying causes the door to hesitate, reverse unexpectedly, or stop mid-travel; in advanced cases the cable snaps and the door becomes manually operable only. The drive motor itself is also prone to brush wear and armature failure, producing a grinding noise during door operation.

  What you would notice

  • Power sliding door hesitates, stops mid-stroke, or unexpectedly reverses during normal open or close operation
  • Grinding or straining noise from the lower sill area when the door operates
  • Door operates normally when pushed or pulled manually but fails to complete travel under motor power alone
  • Door warning lamp on the instrument panel illuminating or flashing during attempted power operation

  Typically $400–$1,400 to put right.

What these repairs cost on other cars

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

• Turbo Repair and Replacement Cost

Other Honda models