Cristian CITROËN C4 Grand Picasso II

For the 2016 Citroën Grand C4 Picasso:

- Timing belt replacement interval: Official manufacturer recommendations for the timing belt change on this model are typically every 100,000 to 110,000 miles (around 160,000 to 175,000 km) or every 10 years, whichever comes first. Some sources and garage experiences suggest being a bit proactive around 60,000 to 70,000 miles for peace of mind because this model has a "wet" timing belt setup, which is known to have earlier wear risks. So, check your specific engine variant (like 1.6 HDi diesel) in the manual, but around 100,000 miles is a good ballpark. The replacement usually includes the belt, tensioner, idler pulleys, and often the water pump too to avoid double labor.

- Automatic transmission oil: For the automatic gearbox in the Grand C4 Picasso (likely the AL4/DP0 transmission), the recommended fluid is typically Dexron VI or specific PSA-approved ATF fluid. The fluid changes are not always routine—you don’t top off ATF casually like engine oil. Some manufacturers state these transmissions are "fill for life," but many garages advocate changing or flushing the fluid every 60,000 to 80,000 miles to prevent wear and rough shifts. Checking the fluid level and condition with proper diagnostic tools is essential because overfilling or contaminated fluid can cause problems.

- Fluid change recommendation: Changing the automatic transmission fluid is advised periodically for transmission health and longevity—consult your service manual or dealer for the best interval, but 60,000 miles or every 5 years is a common practice. Old fluid can degrade and cause shifting issues or damage over time.

So for your 2016 Grand C4 Picasso, keep an eye on mileage and age—the timing belt replacement is a big maintenance event that can save headaches and engine damage, while careful management of the automatic fluid keeps your transmission shifting like butter 🚗🔧⚙️