Daihatsu Rocky: common faults & what to check

Which Daihatsu Rocky are you looking at?

Pick the year and the engine. The faults below narrow to that exact combination, because a 1.8 and a 2.4 of the same car do not fail the same way. Free, no account needed.

Start your free check on this Daihatsu Rocky

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

• Serious issue

  Run the VIN through Toyota Australia or Daihatsu's online recall checker before purchase.

  See why

  Daihatsu Safety Test Data Falsification — Side Curtain Airbag Recall

  In December 2023 Daihatsu confirmed it had falsified safety certification test data across 174,000+ vehicles including the Rocky A200S. The specific issue for the Rocky involved side pole impact testing where curtain airbag deployment timing data submitted to regulators was manipulated. Toyota suspended Rocky and Raize production and sales in Japan, and issued market recalls in Australia and NZ. Vehicles produced before the halt require a dealer inspection to verify airbag system conformance. Unverified vehicles have an unvalidated airbag deployment window in side pole impacts.

  What you would notice

  • Airbag SRS warning light on at startup that does not extinguish (indicates stored SRS DTC)
  • Absence of completed recall inspection stamp in service history for vehicles built before January 2024
  • Dealer system showing open recall status when VIN is checked

  Typically $0 to put right.

• Costly issue

  Use a magnet along the lower sill to detect filler.

  See why

  Lower Body Sill and Wheel Arch Seam Corrosion

  The A200S Rocky's lower sill pinch welds and the rear wheel arch lip seam are factory-seamed rather than continuously welded, creating moisture traps where road film accumulates. NZ and coastal AU environments accelerate corrosion at these joints, with rust propagating under factory underbody coating. First generation Rocky (2019-2021) units with thin anti-corrosion wax application are disproportionately affected. Documented in NZ WOF inspection refusal records and owner community photographic evidence. Corrosion in advanced form compromises the structural sill which is a safety-critical load path in a side-impact.

  What you would notice

  • Bubbling or lifting paint along the lower door sill, often starting at the front-door step edge
  • Visible rust or brown staining at the rear wheel arch seam above the tyre
  • Soft or perforated metal detected by probing at pinch weld seams
  • WOF refusal citing corrosion in structural sill area

  Typically $700–$3,500 to put right.

• Costly issue

  Test drive the vehicle at a steady 50-60km/h with light throttle, then gently increase throttle input.

  See why

  D-CVT Belt Judder Under Mild Acceleration

  The Rocky uses Daihatsu's D-CVT (belt-and-pulley CVT with a sub-planetary gear set for low range). Under light-to-moderate throttle inputs between 30-80km/h the belt-to-pulley interface can develop judder when CVT fluid loses its friction-modifier additive package. Daihatsu's service interval for the fluid was initially omitted from owner manuals as 'lifetime fill', but a technical correction bulletin shortened the effective change interval significantly. Pre-2022 vehicles sold with original factory fluid and no subsequent fluid service are the most commonly affected.

  What you would notice

  • Noticeable shudder or vibration through the floor and seat under light 30-70km/h acceleration
  • Judder worsening progressively over weeks without fluid change
  • Shudder temporarily resolving after hard acceleration (fluid churning providing temporary lubrication)
  • Transmission warning light in advanced cases indicating pulley slip detection

  Typically $350–$2,800 to put right.

• Costly issue

  Request a cold-start test drive with sustained light throttle to 3000rpm.

  See why

  1KR-VET Electronic Wastegate Actuator Sticking

  The electronic turbo wastegate actuator on the 1KR-VET 1.0T can seize or stick, particularly after cold soaks or during extended low-speed urban driving that allows carbon and moisture to accumulate on the actuator shaft. The ECU detects boost pressure deviation from target and triggers limp mode. Daihatsu-sourced units have shown faster wear than Toyota-shared variants due to actuator housing material differences documented in forum teardowns.

  What you would notice

  • Engine warning light illuminating with loss of power above 80km/h
  • Limp mode activation (limited to approximately 90km/h) particularly in cold or wet conditions
  • Noticeable flat spot between 2000-3000rpm under moderate acceleration
  • Turbo whistling or inconsistent spool sound under load

  Typically $850–$1,900 to put right.

• Costly issue

  With engine running and hybrid system active, feel for airflow at the duct outlet in the boot.

  See why

  e-Smart Hybrid HV Battery Cooling Duct Blockage

  The WA-VEX e-Smart hybrid uses a 48V lithium-ion traction battery pack located under the rear cargo floor, cooled by a cabin-air duct that draws air from inside the vehicle. In NZ/AU use the duct inlet (behind the rear seat base) accumulates dust, pet hair, and debris, progressively blocking airflow. Daihatsu's thermal management system reduces hybrid motor output and eventually disables electric assist entirely when battery temperatures exceed safe operating thresholds. This is a documented hardware cooling path restriction, not a software limit.

  What you would notice

  • Hybrid system warning light (amber triangle) illuminating after extended driving
  • Noticeably reduced electric-only launch assist after the vehicle has been driven for 20+ minutes
  • Battery temperature DTC codes stored (P0A7F or similar hybrid thermal fault)
  • Reduced fuel economy as combustion engine compensates for disabled hybrid motor

  Typically $200–$850 to put right.

• Common issue

  Check for rough or lumpy idle with the engine fully warmed up.

  See why

  1KR-VET EGR Valve Carbon Fouling

  The 1KR-VET's EGR system recirculates exhaust gas through a cooled EGR valve that is particularly prone to soot accumulation due to the engine's short stroke and low displacement. Daihatsu's calibration runs higher EGR duty cycles at urban speeds than the equivalent Toyota Raize tune, accelerating deposit buildup. Heavy soot bridging the EGR valve seat causes it to stick partially open, introducing unmetered exhaust gas at idle and causing rough running. This is a documented consumable failure pattern, not a design recall, but very commonly reported by owners in NZ/AU markets.

  What you would notice

  • Rough or hunting idle (400-900rpm oscillation) when fully warm
  • Increased fuel consumption with no change in driving style
  • P0401 or P0402 fault codes stored
  • Occasional black smoke puff on cold start or light throttle tip-in
  • Mild hesitation on pulling away from rest

  Typically $380–$950 to put right.

What these repairs cost on other cars

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

• CVT Gearbox Repair Cost
• EGR Valve and Cooler Repair Cost

Other Daihatsu models