Kia bulletin SC305
What it saysVOLUNTARY EMISSIONS SERVICE CAMPAIGN: EGR CONTROL VALVE PIPE AND HOSE REPLACEMENT (SC305) - This bulletin provides information to replace the Exhaust Gas Recirculation (EGR) control valve pipe and hose on certain 2023MY… NHTSA’s full summary ↓
Kia filed this with NHTSA as an emissions communication dated Aug 14, 2024, received Aug 9, 2024, about the engine — 7 documents under this number: SC305_OWNR, SC305_TSB, SC305_STKR, SC305_POC and 3 more. It names 1 model year (2023). An emissions communication is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: EGR CONTROL VALVE PIPE AND HOSE REPLACEMENT (SC305) - This bulletin provides information to replace the Exhaust Gas Recirculation (EGR) control valve pipe and hose on certain 2023MY Niro HEV (SG2 HEV) vehicles produced from June 21, 2022 through March 20, 2023 and 2023MY Niro PHEV (SG2 PHEV) vehicles produced from July 11, 2022 through March 17, 2023. The subject vehicles may experience illumination of the Check Engine Light (CEL) due to excessive intake manifold pressure fluctuation. This condition may cause the vehicle to release air pollutants that exceeds Federal and California standards.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC305_OWNR | Emissions | Aug 14, 2024 | 11006217 | PDF, 185 KB |
| SC305_TSB | Service bulletin | Aug 13, 2024 | 11006369 | PDF, 515 KB |
| SC305_STKR | Emissions | Aug 12, 2024 | 11006219 | PDF, 274 KB |
| SC305_POC | Emissions | Aug 12, 2024 | 11006218 | PDF, 152 KB |
| SC305_QA | Emissions | Aug 12, 2024 | 11006216 | PDF, 111 KB |
| SC305_DPSM | Emissions | Aug 12, 2024 | 11006215 | PDF, 111 KB |
| SC305_DP | Emissions | Aug 12, 2024 | 11006213 | PDF, 133 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 65 complaints with NHTSA since 2015.
I am experiencing the same issues as the individual who documented incident #11685147. When I turn the shifter to drive and let my foot off the brake, with auto-hold on, the will still roll backwards, even on flat ground, and not respond to me pushing the gas pedal. I have to put the vehicle back into park, and try again.
2023 Kia Niro · Engine · filed with NHTSA Nov 5, 2025 · ODI 11697775
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group9 other manufacturer communications filed against the Kia Niro under the same component group (engine), newest first. The eight newest are listed; the rest are on the Kia list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SC325 | Emissions | Feb 20, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: AEWP INSPECTION AND REPLACEMENT (SC325) - This bulletin has been revised t… |
| DC26 | Service campaign | Feb 10, 2026 | TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin has been revised to include a… |
| SC320 | Emissions | Nov 20, 2025 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: EGR VALVE ASSEMBLY REPLACEMENT (SC320) - This bulletin has been revised to… |
| TSB_ENG222_R8 | Service bulletin | Apr 3, 2025 | TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional in… |
| TSB_ENG222_R7 | Service bulletin | Feb 28, 2025 | TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional in… |
| TSB_ELE324 | Service bulletin | Dec 11, 2023 | TECHNICAL SERVICE BULLETIN: ECM SOFTWARE LOGIC IMPROVEMENT FOR DTC U134100 - This bulletin provides information to upgrade the Engine Contro… |
| TSB_ELE270_R2 | Service bulletin | Oct 23, 2023 | TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE "REFILL INVERTER COOLANT"… |
| TSB_ENG247 | Service bulletin | Jul 28, 2023 | TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC24) - This bulletin provides information related… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kia, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SC305 a recall?
No. A emissions communication is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the SC305 repair free?
A emissions communication is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does SC305 cover?
The manufacturer filed it against 1 model year: 2023 Kia Niro. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: 2023MY Niro HEV (SG2 HEV): built 21 Jun 2022 – 20 Mar 2023; 2023MY Niro PHEV (SG2 PHEV): built 11 Jul 2022 – 17 Mar 2023; Niro HEV (SG2 HEV): built 21 Jun 2022 – 20 Mar 2023 — the build date is on the certification label in the driver’s door jamb.