Honda Jazz: i-MMD Engine Clutch Low-Speed Judder

The i-MMD dual-motor hybrid system couples the petrol engine to the drivetrain via a multiplate clutch actuator. At low speeds (approximately 5–30 km/h) when the system transitions from pure EV drive to engine-assisted drive, the clutch engagement can produce a rhythmic judder or shudder felt through the seat and steering wheel. Honda has released i-MMD calibration software updates and revised clutch fluid specifications to address this in affected markets including Japan and the UK. The fault worsens as the hybrid drive clutch accumulates wear and if the vehicle is predominantly driven in urban stop-start conditions.

• Rhythmic shudder or judder felt at 5–30 km/h when gently accelerating from a crawl
• Vibration coincides with petrol engine clutch engagement at low vehicle speeds
• More pronounced when high-voltage battery is low and engine must engage earlier
• Smooth EV-only operation at very low speeds but shudder begins as clutch connects engine to drivetrain
• Symptom can be temporarily reduced after a Honda dealer software recalibration but may return

1. 1

   Test drive at 10–30 km/h on flat road; gently accelerate from a crawl to induce EV-to-engine transition and note any judder or vibration through the seat or wheel.

2. 2

   Check service history for Honda i-MMD calibration software update.

3. 3

   If a workshop inspection is possible: A Honda dealer scan can confirm whether the latest PCM/TCM software has been applied.

Parts involved: Clutch.

$300 to $3,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the vehicle received any Honda i-MMD software calibration updates at a Honda dealer?”
• “Has the vehicle ever been diagnosed for low-speed shudder or vibration during acceleration?”
• “Has the clutch actuator fluid been inspected or replaced?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.