EHRS Coolant Leak | Hyundai Forums On the 3rd time they told me that they found a TSB from Hyundai that my coolant leakage is from a EHRS center muffler The Muffler basically has a heat exchanger manufactured into the exhaust system to heat the cabin area quicker and more efficiently
HMA TSB - National Highway Traffic Safety Administration Description: Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly
23-EM-009H Hyundai Engine and Engine Cooling TSB Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly
2021 HYUNDAI SONATA HYBRID Technical Service Bulletins (TSBs) Summary: Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly
2021 HYUNDAI SONATA HYBRID Technical Service Bulletins (TSBs) - Hyundai . . . Summary: Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly
23-EM-009H Service Bulletin Repair Instructions Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly