IsItAGoodCar
Reliability Guide

Common Problems with the
2015 Toyota iQ (AJ10)

We've identified 1 known issue that can affect the 2015 Toyota iQ (AJ10). None are considered critical, but they're worth knowing about before you buy.

1
Known Issues
0
Serious
1
Moderate
0
Minor

All Known Issues

Multidrive CVT Automatic Transmission Judder on Take-Off

ModerateGearbox & Transmission

The optional Multidrive continuously variable transmission (CVT) can develop a noticeable shudder and hesitation when setting off from a standstill, particularly on upward gradients. The fault stems from degraded CVT fluid, contaminated solenoid valves within the hydraulic valve body, or slippage of the steel drive belt across the variable pulleys due to missed fluid changes.

Est. Repair Cost: £250–£750
Warning Signs:

Pronounced vibrating judder transmitted through the driver seat and floorpan when pulling away gently, Hesitation of several seconds followed by sudden harsh lurch when pressing the accelerator pedal, Whining noise from the transmission casing that increases with road speed in town driving, Transmission flares revs without corresponding vehicle acceleration on hills

What to Inspect:
  • Conduct several gentle and brisk pull-aways from a dead stop on an incline to check for belt judder
  • Select Reverse on a slope and ensure immediate smooth engagement without delay or thumping
  • Review service history receipts for genuine Toyota CVT Fluid TC or FE changes
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2015 Toyota iQ (AJ10)

  • Test the idle stability of the 1.0-litre engine to ensure the EGR valve is not choked with carbon from repetitive short urban trips.
  • Turn the steering wheel lock-to-lock at low speed to confirm the electric power steering motor assists smoothly without knocking.
  • On Multidrive CVT models, execute smooth low-speed pull-aways on an incline to check for transmission belt shudder or clutch slip.
  • Inspect front brake discs for heavy rust ridges, as lightweight urban cars rarely work their friction brakes hard enough to clear corrosion.
  • Check the operation of the passenger-side dashboard sliding glove bag and fold-flat rear seats to ensure interior clips remain intact.
2012–2014
Check a 2015 Toyota iQ (AJ10) by Registration