On September 22, Hyundai recalled 1,642,551 vehicles in the United States with an estimated defect percentage of 1%, according to the recall announcement.

In the summer of 2019, Hyundai was informed of ABS module overheating issues in U.S.-market Elantra and Accent models and obtained the modules for inspection, but both were severely damaged and could not determine the cause of the problem.

Hyundai Motor North America Safety Operations has opened three cases and was informed of a fourth case involving the Elantra in December 2020 and opened an investigation into the issue. That vehicle’s modules were also sent for inspection.

Hyundai first discovered the cause of the problem in February 2021, finding evidence of a brake fluid leak within the unit.

Reports of car troubles continued throughout 2021, and Hyundai hired a third-party engineering firm called Exponent to see if the root cause could be determined.

By December 2021, Exponent told Hyundai that the overheating issue could be caused by an internal leak of brake fluid in the ABS module’s hydraulic circuit. Research into the faulty module continued and in May 2022 the culprit was identified – brake fluid on both sides of the O-ring on the ABS motor shaft.

The investigation continues into 2022 and 2023, and Hyundai found foreign material contaminants in brake fluid remaining in the modules. Then, this summer, the company finally identified the ultimate cause:

 Exponent discovered that the O-rings used in ABS modules are composed of different rubber material formulations determined through thermogravimetric (“TGA”) analysis. In an update provided on September 6, 2023, Exponent confirmed that certain material formulations used in O-ring rubber may age and lose hardness over time. Additionally, the material may be affected by foreign contaminants in the brake fluid, which may affect sealing performance.

Hyundai said owners of affected cars can continue to drive them, but they should park their vehicles outside and away from buildings until the problem is resolved. The remedy is to use a new ABS module fuse that provides less operating current to the module. Hyundai also said that “owners of affected vehicles will be reimbursed for out-of-pocket costs incurred to obtain remedies for the recall conditions in accordance with a reimbursement plan submitted to NHTSA on February 24, 2022.”

Attached are the recalled models:

 2012-2015 Hyundai Accent

 2012-2015 Hyundai Yazun

 2011-2015 Hyundai Elantra

 2013-2015 Hyundai Elantra Coupe

 2014-2015 Hyundai Equus

 2011-2015 Hyundai Genesis Coupe

 2013-2015 Hyundai Santa Fe

 2013-2013 Hyundai Santa Fe Sport

 2010-2013 Hyundai Tucson

 2015-2015 Hyundai Tucson Fuel Cell Vehicle

 2011-2015 Hyundai Sonata Hybrid

 2012-2015 Hyundai Veloster

 2010-2012 Hyundai Veracruz

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The modified Tucson exposed this time has a large number of camouflage patterns, and the overall protection is very tight. The grille is reduced on the front face, and the space between the grille and the air intake of the lower bumper is enlarged.

The body line of the whole vehicle is basically the same as that of the existing model, but a new exhaust tip can be seen at the rear. While some of the taillights remain in the existing style, the retail version may be tweaked slightly.

The latest version of Tucson was exposed in 2020 and will be launched in 2022, so it is not yet time for a mid-term facelift.

According to the automaker’s recent 2024 refresh announcement, the facelifted model should be a 2025 model, which means it could launch in the second half of next year.

Relevant pictures here as follows:

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According to reports, this product is an autonomous driving computing platform self-developed by Tucson to meet the vehicle specification level. It integrates sensor input, high-performance computing, vehicle control unit (VCU) and automatic driving application software, and can meet the requirements of L2+ to L4 automatic driving. Compute needs.

After multiple rounds of software and hardware system iterations and actual road tests, the B sample product has been delivered to customers for testing and verification, and the C sample is expected to start shipping in the second quarter of 2023. The mass-produced version will cooperate with internationally renowned OEM manufacturers and is expected to be delivered in the Chinese market by the end of 23, and is expected to land in the European and American markets one after another.

TDC can realize a series of autonomous driving solutions by seamlessly cooperating with sensors of different configurations and TuSimple’s automatic driving application software.

The summary is as follows:

• ADAS: L2+ and conditional L3 ADAS solutions for commercial vehicles, improving road safety and fuel efficiency
• Perception fusion module: software and hardware modules integrate multiple sensors to provide OEM customers with highly customizable and low-cost full-stack perception solutions
• L4 level automatic driving: main control + redundant computing unit, providing computing power for L4 level automatic driving system

TuSimple said that unlike most of the development models based on NVIDIA modules in the market, TDC conducts customized development based on NVIDIA Orin system-level SoC chips, which can provide more fine-grained scene technology customization capabilities, and compared with the module development model Costs are down about 25%.

For example, TDC will support two heat dissipation schemes of air cooling and water cooling, and provide two kinds of power supply support of 12V and 24V. The combination of different schemes allows customers to choose more flexibly. It is worth mentioning that the TDC 24V power supply scheme can meet the power supply requirements of domestic heavy trucks, and it is also a unique power supply design scheme for Tucson in the future.

In terms of underlying software, TDC products support AUTOSAR Classic Platform adaptation and AUTOSAR Adaptive Platform integration, and provide SOTA and FOTA solutions, with built-in CMOS sensor modules and lidar drivers common in the market.

The design and development of TDC products adopts commercial vehicle design standards, which are more stable and safer than passenger vehicles. TDC adopts the ASIL-D level QNX operating system and integrates the ASIL-D level Infineon TC397 chip. The overall functional safety level of the product reaches the ASIL-D level.

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