Service bulletins for the 2020 Hyundai Sonata
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.
124 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Brakes are shown. Show all
| 21-BR-002H | 2021-04-07. Service bulletin. SERVICE BRAKES; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin provides best practice recommendations when performing brake service procedures. |
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| 20-BR-002H | 2020-12-08. Service bulletin. SERVICE BRAKES. This bulletin describes the procedure to inspect and identify fluid which may appear around the brake caliper area. |
| 20-FL-004H | 2020-06-06. Service bulletin. SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; POWER TRAIN. This bulletin describes the Idle Stop and Go (ISG) system operation, diagnostic and battery sensor recalibration procedure. Refer to applicable Shop Manual and Owner’s Manual for additional information. |
| Campaign T4J Dea | 2020-01-21. Service bulletin. SERVICE BRAKES. Hyundai is conducting a Service Campaign to inspect, and if necessary, re-route the main harness adjacent to the brake booster of certain 2020MY Sonata (DN8) vehicles. |
| 19-01-043H | 2020-01-21. Service bulletin. SERVICE BRAKES. This bulletin describes the procedure to inspect, and if necessary re-route the main harness adjacent to the brake booster of certain 2020MY Sonata (DN8) vehicles. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.