Infiniti bulletin P4A05, P4A06
Infiniti filed this with NHTSA as a service bulletin dated Feb 4, 2025, received Feb 10, 2025, about the engine. It names 5 model years (2016–2018). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communication***** Retailer Announcement ***** INFINITI is committed to providing the highest levels of product quality and customer satisfaction. Therefore, INFINITI is conducting a warranty extension to Full Useful Life (FUL) of 10 years or 120,000 miles, whichever occurs first, if white smoke or oil leak occurs with MIL-On condition that requires replacement of the turbocharger assembly on model year 2016-2018 Q50 and model year 2017-2018 Q60. All other warranty terms, limitations, and conditions remain unchanged. On some model year 2016-2018 INFINITI Q50 and 2017-2018 Q60 vehicles there is a possibility that the turbocharger bearing may leak engine oil internally due to premature wear. The internal turbocharger oil leak may cause one or more of the following: Excessive smoke from the exhaust, Service Engine Soon (MIL) light and in severe cases, lack of engine power or damage to the internal components of the turbocharger. During the limited emission warranty extension period, owners are eligible for free replacement of the Turbocharger if it is determined to be required by an INFINITI trained technician. Owners of eligible vehicles will receive notification of this limited emission warranty extension during February 2025. ***** What Retailers Should Do ***** 1. Verify if vehicles are eligible for this Warranty Extension using the warranty extension page of Service Comm. Then, proceed with the instructions in item (2) below. 2. If a client contacts the retailer with a Turbocharger concern in an owned or leased vehicle, retailers should use the Electronic Service Manual (ESM) and appropriate Technical Service Bulletins (TSB) to diagnose the root cause of the customer concern and identify the correct repair to resolve the customer concerns. NOTE: Retailers will need to follow the warranty process and obtain pre-approval when the repair cost exceeds a Retailer’s Claims Administration/Authorization Limits (DCAL). CONFIRM: With the vehicle at operating temperature excessive smoke from exhaust, the Service Engine Soon (MIL) light on (with DTC P0106) due to excessive oil in the intake system from a turbocharger, or other damage to the turbocharger due to unusual bearing P4A05/P4A06 | Original Document wear and oil leakage. Proceed to replace the affected turbocharger(s) and update the vehicle to the latest engine software.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| P4A05, P4A06 | Service bulletin | Feb 4, 2025 | 11014069 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Infiniti P4A05, P4A06 a recall?
No. A service bulletin 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 P4A05, P4A06 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does P4A05, P4A06 cover?
The manufacturer filed it against 5 model years: 2018 Infiniti Q50, 2017 Infiniti Q50, 2016 Infiniti Q50, 2018 Infiniti Q60, 2017 Infiniti Q60. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.