# Service bulletin T\-TT\-0602\-20 Rev

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10177589
- Published by NHTSA: 2020\-07\-27
- Manufacturer's number: T\-TT\-0602\-20 Rev
- Manufacturer's date: 2020\-06\-09
- NHTSA component: SUSPENSION; TIRES; STEERING

## NHTSA's summary

TT: Some 2019\-2020 model year 4Runner SR5 and TRD Off Road grade models with Dunlop Grandtrek AT20 P265/70R17 tires may experience vibration \(flutter\) in the steering wheel when driving at highway speeds 55 mph and above.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177589-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177589-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Steering, Suspension, Tires

## Vehicles listed

- 2019 to 2020 TOYOTA 4RUNNER

## Recalls for the same vehicles and component

- [19V670000](/recalls/nhtsa/19V670000.md), 2019-09-20: SUSPENSION; STEERING

## Other bulletins for the same vehicles and component

- [Toyota PRO19\-02](/bulletins/10207946.md), 2022-02-14, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; WHEELS; TIRES. POL: This consolidated Tire Warranty Guide contains the complete warranty terms for all brands of ground and spare tires currently in use by Toyota. This information must be kept near the point of vehicle sale and be available to any customer that requests it. Customers can find this information on the Owner?s section of Toyota.com. Dealers can locate a copy of this guide on the Claims Processing \& Resource Center in Dealer Daily as well.
- [T\-TT\-0578\-19 Rev](/bulletins/10182983.md), 2020-11-23, Service bulletin: STEERING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ?Difficulty to pair the phone. ?Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ?Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
- [T\-SB\-0094\-20](/bulletins/10181779.md), 2020-10-26, Service bulletin: SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. TSB: Some 2019 ? 2020 model year TRD Pro Edition 4Runner vehicles may exhibit a knocking noise when driving at low speeds over uneven road surfaces \(small bumps and dips\) in cold conditions. The noise is noticeable in cold temperatures \(less than 40?F\) and diminishes as temperatures increase. The TRD Pro shock absorbers have been improve noise performance. Follow the Repair Procedure in this bulletin to address the condition.
- [T\-TT\-0602\-20](/bulletins/10173792.md), 2020-04-13, Service bulletin: TIRES; STEERING. TT: Some 2019\-2020 model year 4Runner SR5 and TRD Off Road grade models with Dunlop Grandtrek AT20 P265/70R17 tires may experience vibration \(flutter\) in the steering wheel when driving at highway speeds 55 mph and above.
- [GST\-TSB\-20\-001](/bulletins/10173776.md), 2020-04-13, Service bulletin: WHEELS; TIRES; STRUCTURE:BODY:BUMPERS. This Technical Service Bulletin provides procedures to inspect and repair certain model year 2020 Toyota 4Runner vehicles equipped with GST installed wheels that are part of its Blackout Package which may exhibit an abnormal noise when in Reverse with the wheels at or near full lock due to interference between the tire and bumper and/or fender liner. The non\-Toyota wheel accessory was installed as a Gulf States Toyota installed option.
- [T\-SB\-0074\-19\_Rev](/bulletins/10173738.md), 2020-04-13, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION. TSB: Some 2014 ? 2019 model year 4Runner vehicles may exhibit a whine/groan noise from the rear of the vehicle. This condition may occur while driving at approximately 40 ? 60 mph at a consistent speed, slight acceleration, or slight deceleration. This condition may be caused by rear differential vibration transferring through the chassis and body. Follow the Repair Procedure in this bulletin to improve this condition
- [T\-TT\-0578\-19](/bulletins/10168537.md), 2019-12-02, Service bulletin: STEERING. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
- [T\-SB\-0074\-19](/bulletins/10164329.md), 2019-09-03, Service bulletin: SUSPENSION; ENGINE; POWER TRAIN. TSB: Some 2014 ? 2019 model year 4Runner vehicles may exhibit a whine or groan noise from the rear of the vehicle. This condition may occur while driving around 40 ? 60 mph at a consistent speed, slight acceleration, or slight deceleration. This condition may be caused by rear differential vibration transferring through the chassis and body. Follow the Repair Procedure in this bulletin to improve this condition.
- [T\-TT\-0554\-19](/bulletins/10163728.md), 2019-08-12, Service bulletin: WHEELS; TIRES. TT: Steering wheel vibration and/or shimmy while driving at 62 mph or above. ? This is for vehicles with less than 5,000 miles and OE wheels and tires. ? Vehicles must have P265/70R17 Dunlop tires. ? No previous repair for same concern or tire rotations.
- [T\-TT\-0546\-19](/bulletins/10161539.md), 2019-06-24, Service bulletin: SUSPENSION. TT: Some 2019 model year 4Runner?s equipped with the TRD PRO package and Fox shocks may experience a ?knocking? noise over bumps with cool ambient temperatures, normally below 35 degrees Fahrenheit.

JSON: [/v1/bulletins/10177589](/v1/bulletins/10177589)

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