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12 how often does Jetta throttle nozzle wash?

How often does 12 Jetta throttle nozzle wash? Introduce the following related contents:

12 Jetta throttle nozzle should be cleaned every 40,000 to 60,000 kilometers. Nozzle dirty performance is: 1, engine noise increases; 2, the throttle response is not sensitive, the driving is not smooth, and there is a lag phenomenon after stepping on the throttle; 3. Idle jitter. The length, width and height of 12 Jetta are 44 15mm, 1647mm, 14 15mm respectively, and the wheelbase is 2471mm. Equipped with a five-speed manual gearbox, the top speed is 175km. 12 Jetta trunk has a volume of 660L, engine displacement 1.6L, maximum horsepower of 95 horses and maximum torque 140Nm.