Honda Jazz 1.2 GD

The manual gearbox on the GD Jazz is known for developing a whine or rattle from the input shaft bearing. The noise typically appears between 80,000 and 150,000 km and is most noticeable under hard acceleration in lower gears. It gets louder over time but does not usually cause sudden failure. Honda acknowledged the problem and offered an extended warranty (up to 7 years) on some affected gearboxes. Replacing a single bearing costs around €600 at a specialist, while replacing all seven bearings runs closer to €1,300. If the gearbox is already being removed, it makes sense to replace the clutch at the same time. Many owners drive tens of thousands of kilometres with the whine without further deterioration.

The rear wheel bearings on the GD Jazz are widely reported as a premature failure item. Honda is aware of the design weakness. Symptoms include a droning noise that gets louder at highway speeds and changes tone slightly when turning. Bearings typically need replacement between 80,000 and 130,000 km. The part is inexpensive (€25-80 per side) but labor involves pressing the bearing in and out of the hub, so total cost per side is approximately €150-200 at an independent garage. Both sides often need replacing within a short interval.

The passenger-side engine mount (below the battery tray) is particularly prone to failure on the GD Jazz. The rubber perishes and tears, causing noticeable vibration at idle and a jolt when engaging drive. This is more common on CVT-equipped cars but also affects manuals. The mount itself costs €40-80 for a quality aftermarket part. Using cheap replacements often results in the problem recurring within a year. Total replacement cost including labor is typically €100-200, or up to €300 if multiple mounts are replaced.

The door lock barrels on the GD Jazz are prone to seizing, particularly in humid or coastal climates. The key may refuse to turn, or the remote central locking stops operating individual doors. The root cause is dirt and moisture ingress into the lock mechanism. In mild cases, graphite lubricant restores function. If the lock actuator has failed, aftermarket replacements cost around €30 per door, with about 30 minutes of labor each. Prevention is straightforward: regular lubrication of the lock barrels with graphite spray.

The factory sealant under the roof gutter strips cracks with age, allowing water to travel down into the boot area and pool in the spare wheel well. This is a widespread problem on the GD Jazz and Honda extended the warranty to 6 years to address it. The fix involves removing the old sealant and reapplying new flexible sealant, which costs around €50 in materials for a DIY repair. A garage will charge €100-200. Left unaddressed, standing water can eventually corrode the boot floor and damage the spare wheel and jack.

The 1.2 i-DSI engine uses twin spark plugs per cylinder, meaning eight spark plugs and four coil packs. The rear spark plugs are tucked away and easily overlooked during servicing. Coil packs can deteriorate from around 100,000 km, causing misfires and rough running. Individual coil packs cost €30-50 each. Since the rear plugs are harder to access, labor can add up if all four coils and eight plugs are replaced simultaneously. Total cost for a complete replacement is approximately €150-250 at an independent garage.

The front strut top mounts on the GD Jazz deteriorate over time, causing a clunking noise over rough surfaces and a creaking sound at full steering lock. This typically becomes noticeable after 120,000 km or 10+ years. The mounts themselves cost €30-50 per side. If struts are also due for replacement, doing the mounts at the same time is recommended. Total cost for both sides including labor is approximately €150-350 depending on whether the struts themselves also need replacing.