A few days ago, Autogate.com announced the december 2021 mid-size car complaint index rankings. In December, the complaint index of mid-size cars in the auto door network reached 755.95, down 8.66% month-on-month, and the complaint index of many models in the top 10 list rose by different margins. It is worth mentioning that Sonata, which is about to be forgotten by everyone, entered this month's list because of engine burning oil and abnormal noise, and the complaint index increased by 215.9% month-on-month. At the same time, the top three Passat, BMW 3 Series and Audi A4L, these three cars can be called regulars in the mid-size car complaint index rankings.

1
Passat Complaint Index: 66.30
Typical fault: Transmission electromechanical unit failure
Car quality complaint comments: Passat this month's complaint index is still rising, the complaint index reached 66.30, the reason for the complaint is still from the Volkswagen double clutch transmission that has been criticized by everyone, from the complaint data, the new and old models have this problem, in addition, there are some car owners complained about the Passat car and air conditioning odor and other body and electrical problems.
2
BMW 3 Series Complaint Index: 65.40
Typical failures: oil spills from the engine, sales fraud
Car quality complaint comments: BMW 3 series this month's complaint index of 65.40, ranking higher than last month to the second place, the complained engine oil leakage problem has always been its common disease, this problem is not less ridiculed by car friends "only engine oil leakage can prove that the genuine BMW" can be bought. In addition, some car owners complained that BMW was suspected of sales fraud.
3
Audi A4L complaint index: 58.20
Typical faults: abnormal transmission noise, engine failure lights
Automotive quality complaint reviews: The Audi A4L remained third this month, but the complaint index rose to 58.20. Judging from the feedback from the complaints, the problem of abnormal sound in the gearbox is still serious, and the problem of engine failure lights being lit up has been carried out by the owner this month, more in the 2020 model.
4
Bo Rui Complaint Index: 39.40
Typical faults: transmission ups and downs, engine shaking
Auto quality complaint comments: Barry, which has always had a low complaint index, has been on the mid-size car complaint list this month due to the problem of gearbox setbacks, ranking fourth, and the problem is more in the 2015 and 2016 models. In addition, some car owners have complained about the problem of engine shaking.
5
Asian Dragon Complaints Index: 37.60
Typical faults: increased oil, suspension failure
Car quality complaint comments: Zhoulong can be regarded as a frequent customer in the mid-size car complaint rankings, this month's complaint index is 37.60, from the feedback of complaint data, typical failures are still the clichéd oil increase problem, the problem is mostly in the 2019 models. In addition, there are also owners who complain about the problem of the Asian Dragon suspension due to inconsistent body height, which still appears in the 2019 model.