Here's why:
* Manual transmissions are sealed units: Unlike automatic transmissions, manual gearboxes are designed to be filled with oil for their lifespan and don't require regular checks.
* Oil is not a maintenance item: The oil in a manual transmission is designed to last the lifetime of the gearbox. You'll only need to replace it if there is a leak, the gearbox is damaged, or if you're performing a major overhaul.
What you should do:
* Monitor for leaks: Look for any signs of oil leaking from the gearbox.
* Listen for unusual noises: If you hear grinding, whining, or other unusual noises coming from the transmission, consult a mechanic.
* Follow your owner's manual: The manual for your specific Passat will provide any specific maintenance recommendations for the gearbox.
Important note: If you are unsure about any aspect of your car's maintenance, always consult a qualified mechanic.
