2020 Genesis G80 Technical Service Bulletins

37 technical service bulletins (TSBs) are on record for the 2020 Genesis G80. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11038692Oct 22, 2026Body and structure. This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly.
• 11032523Apr 10, 2026Air bags. The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co., Ltd. (DTN). These inflators were not supplied, approved, or authorized by the vehicle manufacturers and have primarily been found in vehicles that previously experienced a crash and underwent airbag…
• 11032522Apr 10, 2026Air bags. The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co., Ltd. (DTN), that have been identified in U.S. vehicles following prior crashes, theft, or non‑certified airbag replacements. These inflators are not approved for use, may rupture during…
• 11025476Nov 6, 2025Exterior lighting. This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes or…
• 11019055May 30, 2025Other or unknown. This bulletin provides repair information for the dark chrome trim when stains are present. Some stains may occur from hard water or cleaning chemicals used during a car wash. Follow the procedures below to replace the affected dark chrome moldings.
• 11018581May 8, 2025Electrical system. Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Connected Car Services functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connection by resetting the AVN unit.
• 11017471Apr 29, 2025Electrical system. Certain Genesis vehicles may experience an inoperable horn from moisture or carbonization at the contact point. This bulletin provides a guide to inspect and replace the horns.
• 11013238Jan 28, 2025Other or unknown. This procedure provides repair information for the dark chrome trim when stains are present. Some stains may occur from hard water or cleaning chemicals used during a car wash. Follow the procedures below to replace the affected dark chrome moldings.
• 11009768Oct 31, 2024Transmission and drivetrain. Certain GV70 (JK1, JK1A), GV80 (JX1) and G80 (RG3) vehicles may have a hum or whine noise condition from the rear differential at certain speeds. This bulletin describes the procedure to inspect the vehicle for the hum or whine noise and if necessary to tighten the rear differential lock nut first. If the hum or whine noise remains, then replace the rear differential or other driveline components as necessary.
• 11006825Aug 12, 2024Wheels. This bulletin provides information to inspect and replace the front or rear wheel bearing hub assemblies for all Genesis vehicles. This procedure is applicable when noise (whirring, roaring, grinding, rumbling, etc.) is present which gets louder when driving with more speed.
• 10238384Jun 20, 2023Transmission and drivetrain. When servicing an 8-speed automatic transmission vehicle with a “Check Engine light” and any of the DTCs listed below, follow the Service Procedure and, if necessary, replace the E-module.
• 10238378Jun 9, 2023Engine cooling. Certain 2017-2020MY G80 vehicles may exceed evaporative emissions standards due to Onboard Refueling Vapor Recovery (ORVR) system. To correct this symptom, install an auxiliary canister assembly between the canister and Canister Close Valve (CCV).
• 10235568Apr 25, 2023Engine cooling, Fuel system. Certain 2017-2020MY G80 vehicles may exceed evaporative emissions standards due to Onboarding Refueling Vapor Recovery (ORVR) system. To correct this symptom, install an auxiliary canister assembly between the canister and Canister Close Valve (CCV).
• 10235567Apr 25, 2023Fuel system, Engine cooling. Certain 2017-2020MY G80 vehicles may exceed evaporative emissions standards due to Onboard Refueling Vapor Recovery (ORVR) system. To correct this symptom, install an auxiliary canister assembly between the canister and Canister Close Valve (CCV).
• 10235566Apr 24, 2023Body and structure. Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships. It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. In rare cases, the paint can become clouded under the PPF. These spots are the result of moisture trapped between the PPF and the paint.
• 10233543Mar 20, 2023Engine cooling. When servicing a vehicle with a “Check Engine light” and any of the DTCs listed below, follow the Service Procedure to replace the related solenoid and E-module or park position switch.
• 10230903Jan 30, 2023Visibility (wipers, defrost, mirrors). This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly.
• 10253048Aug 17, 2021Transmission and drivetrain. This TSB provides a procedure to diagnose and repair a transmission for the following Incorrect Ratio DTC (transmission clutch slipping more than 200 rpm in gear).
• 10253053Jul 23, 2021Fuel system. This TSB provides consolidated diagnosis and repair information, currently in the shop manual, to address DTC U0109 / U010900 related to a communication error with the Fuel Pump Control Module (FPCM).
• 10190044Mar 30, 2021Engine cooling, Equipment. This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required steps.
• 10253049Feb 3, 2021Equipment. Genesis applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships. It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. In rare cases, the paint can become clouded under the PPF. These spots are the result of moisture trapped between the PPF and the paint.
• 10183960Nov 19, 2020Wheels, Tires. This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration performance. For all wheel/tire balance claims, the “Tire Balance Data Sheet” must be fully completed including imbalance and Road Force Variation (RFV) data. The Data Sheet can be found at the end of this bulletin.
• 10253036Sep 24, 2020Transmission and drivetrain. The bulletin describes the procedure to measure and set propeller shaft angles to optimize driveline vibration performance on certain 2019-2020MY 3.8L AWD G80 (DH) vehicles.
• 10253038Jul 27, 2020Transmission and drivetrain. This bulletin provides a procedure to transfer oil pressure data to the TCU using GDS Mobile. This procedure is necessary to reduce the TCU learning time and improve the shift quality.  Before replacing an automatic transmission (Pages 2~3): Input the data from the new transmission into the TCU using the GDS.  Before replacing a TCU (Pages 4~6): Back up the oil pressure data from the old TCU into the GDS and…
• 10253013Apr 8, 2020Equipment, Electrical system. This bulletin describes the procedure to install an Audio Video Navigation (AVN) software update which repairs a condition in which the radio presets may reset during AVN start up.
• 10253034Mar 27, 2020Seats. Some vehicles may experience seat noise and/or possible wobble movement from the seat bottom when the vehicle is turning. This bulletin describes the procedure to install an e-ring clip to the tilt pipe housing on the front seat.
• 10253033Mar 2, 2020Seats, Body and structure. Certain 2019-2020 G80 (DH) vehicles may have a condition where the seat backboard comes loose. This bulletin describes the procedure to replace the seat backboard clip.
• 10253031Nov 18, 2019Visibility (wipers, defrost, mirrors), Electrical system. Certain vehicles (listed below) equipped with the HomeLink5 (Two Way Communication) mirror may experience programming and operating difficulties with the home garage system. This bulletin provides information related to some of the possible symptoms.
• 10253032Nov 14, 2019Brakes. This bulletin describes the procedure to inspect and if necessary repair brake pulsation on Genesis vehicles.
• 10253046Oct 8, 2019Body and structure, Seats. Certain 2019-2020 G80 (DH) vehicles may have a condition where the seat backboard comes loose. This bulletin describes the procedure to replace the seat backboard clip.
• 10253026Sep 30, 2019Transmission and drivetrain. If you are servicing a vehicle with a transmission slipping concern, follow the Service Procedure shown below and perform a stall test. This TSB provides a procedure to test each clutch in the transmission. If the vehicle fails the stall test, replace the transmission. PASS: Stall speed is between 1700~2900 rpm (See shop manual for stall speed). FAIL: Engine revs to redline limit (6,000~6,500 rpm). If so, replace…
• 10253029Sep 24, 2019Body and structure, Seats. Some vehicles may experience seat noise from seat bottom when vehicle is turning. This bulletin describes the procedure to install an e-ring clip to the tilt pipe housing on the front seat.
• 10253028Aug 13, 2019Seats, Body and structure. This bulletin describes the procedure to replace the seat backboard clip. Some vehicles may experience the seat backboard coming loose.
• 10253043Jun 12, 2019Transmission and drivetrain. This bulletin provides a procedure to diagnose an 8-speed automatic transaxle with a harsh and/or delayed shift.
• 10253025Jun 4, 2019Transmission and drivetrain. This TSB provides a procedure to diagnose and repair a transaxle for the following Incorrect Ratio DTC (transaxle clutch slipping more than 200 rpm in gear).
• 10253042Apr 15, 2019Transmission and drivetrain. This bulletin provides a procedure to transfer oil pressure data to the TCU using GDS Mobile. This procedure is necessary to reduce the TCU learning time and improve the shift quality.  Before replacing an automatic transmission: Input the data into the TCU using the GDS.  Before replacing a TCU: Back up the oil pressure data from the old TCU into the GDS and then transfer the data to the new TCM.
• 10253024Apr 8, 2019Transmission and drivetrain. When servicing a vehicle with a “Check Engine light” and any of the DTCs listed below, follow the Service Procedure to replace the related solenoid and E-module or park position switch.

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