Does the 2021 Mazda6 Still Have Rattling Issues?

[Crystal]

At the launch event of the 2021 Mazda6, it was introduced that the vehicle's production processing precision has been comprehensively upgraded, and the rattling issues have been resolved. The cause of the rattling was due to excess liquid entering the gaps between steel plates during the electroplating process, forming residue. This residue would then soften under temperature changes, leading to a series of problems that ultimately resulted in the rattling. Below is more information about the 2021 Mazda6: 1. Powertrain: The 2021 Mazda6 continues to offer two engine options: a 2.0L and a 2.5L. The former delivers a maximum horsepower of 158Ps and a maximum torque of 202N·m, while the 2.5L version boasts a maximum horsepower of 192Ps and a maximum torque of 252N·m. 2. Comfort: The 2021 Mazda6 features new NVH technology for excellent sound insulation. Combined with 11 BOSE speakers, imported high-grade Hokkaido Ash wood, premium Ultrasuede nu fabric, Nappa leather, and other high-end materials, it creates a luxurious and comfortable riding experience. 3. Features: The 2.0L Sky-G Premium Edition adds a heads-up display function. Both the 2.0L Sky-G Premium Edition and the 2.5L Sky-G Supreme Edition now include the LDWS Lane Departure Warning System, SCBS Low-Speed Brake Support System with pedestrian detection, SBS Mid-to-High-Speed Brake Support System, and MRCC Adaptive Cruise Control System.

[Elaine]

I've been driving my 2021 Mazda6 Atenza for almost two years now. When I first got the car last year, I was really worried it would creak all the time like the older models, but so far I haven't encountered any major issues. Occasionally there's some faint noise from the roof when driving on highways, which turned out to be friction from the sunroof seal - applying some lubricant fixed it. Compared to my friend's 2020 model, the 2021 version clearly improved the body welding and interior assembly processes, with added cushioning pads at door panel and dashboard joints. The only annoying rattle was a metallic sound from under the front passenger seat - the dealership found a loose wiring harness clip during inspection and fixed it in five minutes. Overall, the rattles are much less frequent now. If buying a used one, remember to test drive on bumpy roads specifically to check for noises from B-pillars and the trunk.

[HadleyDella]

Having repaired cars for over a decade and worked on hundreds of Mazda6 (Atenza) models, I've noticed the 2021 version has nearly 50% fewer rattling complaints compared to previous generations. The main improvements come from the manufacturer's optimization of weld point strength at the A-pillar and C-pillar, along with more consistent panel gaps. However, body rattles are heavily influenced by driving habits. Last month, I serviced a 2021 model whose owner frequently drove on rough construction sites - the result was a loosely fitted underbody guard creating constant noise. Another common issue is metallic rattling near the rear windshield, which usually stems from improperly adjusted tailgate latches. I recommend regular checks on door seals and interior trim clips, especially in northern winters when plastic components harden and easily rub against the body. For complete rattle elimination, removing interior panels to install sound insulation would be necessary, though such extensive measures are rarely worthwhile.

[ElenaAnn]

I've been following the Mazda6 Atenza for five years, and the rattling issue has existed since the 2018 model. The 2021 model did make improvements, such as using softer plastics for the dashboard and adding damping rubber blocks to the instrument panel bracket. According to feedback from the 2021 model owners in car enthusiast groups, the probability of rattling is about 30%, which is much better than the 60% in older models. Common issues include a rattling sound from the B-pillar when going over speed bumps, mostly due to loose seatbelt pretensioners; or crackling sounds from the dashboard during cold starts, caused by thermal expansion and contraction of plastics. The manufacturer now handles these issues decisively, offering free part replacements within the warranty period. However, the humming sound from the engine compartment during rapid acceleration remains unchanged, which is related to the body rigidity design and is difficult to completely resolve even with model updates.