What causes the rattling noise in the new Jetta during winter?

[VonJameson]

The reasons for the rattling noise in the new Jetta during winter are: 1. The engine oil has not been changed for a long time, leading to a decline in oil quality; 2. Aging of the belt; 3. Exhaust pipe leakage, engine misfiring, and engine resonance. Taking the 2020 Jetta as an example, its body dimensions are: length 4419mm, width 1841mm, height 1616mm, with a wheelbase of 2630mm, a fuel tank capacity of 51 liters, and a trunk capacity of 482 liters. The 2020 Jetta features a MacPherson strut front suspension and a multi-link independent rear suspension. It is equipped with a 1.4L turbocharged engine, producing a maximum horsepower of 150 PS, a maximum power of 110 kW, and a maximum torque of 250 Nm, paired with a 6-speed automatic transmission.

[VincentFitz]

Winter noises in new Jettas are quite common. Having driven for several years, I've encountered similar situations multiple times. Mostly, it's because plastic and rubber components shrink and harden in cold weather, such as door seals or interior trim rubbing and producing squeaking sounds. Chassis parts like suspension or shock absorbers also tend to become stiff at low temperatures, making rattling noises when driving over bumpy roads. Newer cars might fare better, but older vehicles tend to be more noticeable. I recommend driving slowly for a few minutes to warm up the car in cold weather, then carefully listening to identify the source of the noise. If it's coming from the doors or under the hood, try lubricating the seals or gently applying silicone oil to the relevant areas. Regular maintenance can prevent such issues, such as checking the condition of rubber components every quarter.

[AliviaLee]

I drive the previous generation Jetta, and the winter squeaks are quite a headache. The noises usually come from the tires or suspension system. The new Jetta might be better designed, but in low temperatures, changes in rubber tire pressure or aging suspension ball joints can cause creaking sounds. Another common source is the belt system, such as the AC belt tightening in cold weather, leading to friction noises. I found that a quick check at the 4S shop works well—they use professional tools to inspect the chassis and engine areas to pinpoint the root cause. For DIY solutions, I learned to check tire pressure and lubricate door hinges, which can resolve most issues. Don’t ignore these; while minor, squeaks can affect driving smoothness over time.

[StTyler]

We have a new Jetta at home, and the winter squeaks are really annoying, especially when picking up and dropping off the kids—the creaking affects comfort. Common causes include friction from the window seals or interior plastics shrinking in the cold wind, or suspension components making noise due to temperature-induced deformation. It's recommended to perform simple maintenance before the cold sets in, such as lubricating the seals with petroleum jelly or checking if the chassis screws are loose. Regular maintenance can prevent this issue and avoid bigger faults from prolonged neglect. Safety first—when you notice squeaks, drive slowly and get it repaired early.