Your car’s manual might have specific instructions for programming additional key fobs. It might involve a specific sequence using the working key fob and the car’s ignition.

While Volkswagen has improved in recent years, they don’t quite match Honda’s reputation for reliability. Repairs on Volkswagens can also be more expensive.

Transmission fluid pressure is crucial for smooth gear changes. Low fluid levels can lead to slipping gears and difficulty shifting.

Rainwater might be getting into a wiring harness or electrical connector related to the throttle actuator control system. This could cause temporary malfunctions during rainstorms.

While your mechanic initially thought the gear cables looked okay, they might be worth revisiting. Gear cables can fray or stretch over time, causing difficulty shifting. A closer inspection or even replacing them might be worthwhile, especially since it’s one of the few remaining original parts.

The first step should always be to refer to your car’s owner’s manual. Some manufacturers include instructions for self-programming a new key fob, even without a working one. This process might involve using specific button combinations on the in-cabin controls or the key itself.

This is the most common reason. Ensure you press the clutch pedal all the way down to the floor before attempting to shift gears.

This is the most likely culprit. In neutral, there’s no load on the engine. But when you shift to drive or reverse, the transmission engages a gear, putting a load on the engine. If the transmission is malfunctioning, it might not be able to handle this load, causing the engine to stall to protect itself.