AutoStatsIQ
Data through Oct 2026
Model year

2020 Harley-Davidson Fxbb

Motorcycle, gasoline, built in United States. Owner complaints on file from Feb 1, 2022 to Feb 1, 2022.

Recalls (0)Complaints (1)Investigations (0)Bulletins (59)
Recall campaigns covering this model year0No recall campaign lists this model year
Owner complaints1Below the median 2020 motorcycle
Severity index100.02020 motorcycles average 7.1
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2020 Harley-Davidson Fxbb peaked in 2022, with 1 filed

Owner complaints about this model year, by the year they were filed with NHTSA.

00.250.50.751202212023202420252026
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

100% of complaints about the 2020 Harley-Davidson Fxbb name lighting

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

Lighting
1
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

No recall campaign lists the 2020 Harley-Davidson Fxbb

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2020 Harley-Davidson Fxbb

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

1 complaint on file, page 1 of 1.

  1. Filed Feb 1, 2022Failure Oct 15, 2021Sanford, FLExterior lightingFire

    Red stock tail lights melt and catch on fire from the heat of the tail light standard 1157 bulbs. Has happened numerous times on both tail lights.

    NHTSA complaint 11449668
Source: NHTSA ODI complaints file.
Investigations

NHTSA has not opened an investigation on this model year

Source: NHTSA ODI investigations file.
All investigations
Service bulletins

59 manufacturer communications cover this model year

Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

  • M1490 Sep 17, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.9.4): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1733 Aug 14, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1733: COSMETIC CYLINDER STAINING (ALL MILWAUKEE-EIGHT MODELS). PURPOSE: Initial release. This bulletin informs dealers that cosmetic staining or etching on the inside of the cylinder bore does not have an impact on engine performance, oil …
  • M1490 Jul 25, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.8.3): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1490 Jun 11, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.7.3): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1490 Apr 24, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.6.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1679 Mar 14, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1679: AFTERMARKET EXHAUST HEADER DEBRIS. PURPOSE: Initial release. This bulletin informs dealers that Harley-Davidson has identified instances of premature engine failure due to abrasive particle wear, specifically from debris inside new a…
  • M1490 Mar 31, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.5.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1713 Feb 25, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1713 (REV C): DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.4.3). PURPOSE: Revision C. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 202…
  • M1490 Feb 25, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.4.3): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1713 Jan 28, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1713 (REV B): DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.3.2). PURPOSE: Revision B. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 202…
  • M1490 Jan 28, 2026 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.3.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1713 Dec 18, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1713: DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.1.5). PURPOSE: Initial Release. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. …
  • M1490 Dec 18, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 26.1.5): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • W146 Oct 31, 2025 · Warranty Program/Extension
    WARRANTY BULLETIN W146 (REV C): TIRE TREAD DEPTH GUIDE-UPDATE. PURPOSE: [Revision C. Updated: Tire Tread Depth Guide. Add tire part numbers 43100063, 43200035,43100029A, 43100033A and 43200045A.] To provide tire tread depth specifications for the dealers…
  • PAB1171 Oct 25, 2025 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND ACCESSORIES BULLETIN PAB1171 (REV B): SOFTWARE UPDATE FOR SCREAMIN EAGLE PRO STREET TUNER. PURPOSE: Revision B. Updated: Summary. The App has returned to the Apple App Store. This bulletin informs dealers that a recent software up…
  • M1391A Oct 28, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1391A (REVU): MIDTRONICS GRX-3110 AND DCA-8000 SOFTWARE. PURPORSE: Revision U. The purpose of this bulletin is to inform the dealer network that a software update to the GRX-3110 and DCA-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER …
  • M1490 Sep 6, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 25.8.9): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1684 Aug 16, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1684: MARKET SPECIFIC BATTERY INTRODUCTION. PURPOSE: Initial Release. This bulletin informs dealers of the availability of new batteries for new Original Equipment (OE) vehicle production and in the Parts and Accessories (P&A) catalog. Ava…
  • M1490 Aug 26, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 25.8.7): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-4…
  • M1391A Aug 26, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1391A (REV T): MIDTRONICS GRX-3110 AND DCA-8000 SOFTWARE. PURPORSE: Revision T. The purpose of this bulletin is to inform the dealer network that a software update to the GRX-3110 and DCA-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER…
  • M1555 Apr 18, 2025 · Warranty Program/Extension
    SERVICE BULLETIN M1555 (REV H): BATTERY WARRANTY GUIDELINES. PURPOSE: This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty. REV H. Update section headers: AGM and Lithium-Iron Phosphate Batteries. A…
  • PAB1165 Mar 29, 2025 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1165 (REV A): H-D SYN3 SAE 15W50 / SAE 50 AVAILABILITY. PURPOSE: Revision (A) * Updated: Summary, Update table. This bulletin informs of the availability of the SYN3 New Improved Formula, a dual weight S…
  • PAB1165 Feb 11, 2025 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1165: H-D SYN3 SAE 15W50 / SAE 50 AVAILABILITY. PURPOSE: This bulletin informs of the availability of the SYN3 New Improved Formula, a dual weight SAE 15W50 / SAE 50 Motorcycle Oil. The new formula trans…
  • M1555 Mar 1, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1555 (REV G): BATTERY WARRANTY GUIDELINES. PURPOSE: [Revision G: Updated: Information on Battery. Update section headers: AGM and Lithium-Ion Batteries.] This bulletin informs the dealership network that Harley-Davidson has provided guide…
  • M1650 Jan 24, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1650: MILWAUKEE EIGHT AND TWIN CAM CAMSHAFT DRIVE GEAR RETENTION KIT CHANGES. PURPOSE: This bulletin informs dealers that changes have been made to the Camshaft Drive Gear Retention Kit and service proceduresfor the Milwaukee-Eight and Twi…
  • M1611 Jan 29, 2025 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1611 (REV A): MILWAUKEE-EIGHT TRANSMISSION SHIFT DRUM UPDATE. PURPOSE: This bulletin informs dealers that (Part No. 33900172) is obsolete. Dealers must purchase the updated bearing door when installing the new shift drum on 2017-2024 Milwa…
  • W146 Oct 11, 2024 · Warranty Program/Extension
    WARRANTY BULLETIN W146 (REV B): TIRE TREAD DEPTH GUIDE-UPDATE. PURPOSE: [Revision B. Updated: Tire Tread Depth Guide. Add tire part numbers 43200063 and 43200038A.] To provide tire tread depth specifications for the dealership network to consult when fill…
  • M1555 Oct 9, 2024 · Warranty Program/Extension
    SERVICE BULLETIN M1555 (REV F): BATTERY WARRANTY GUIDELINES. PURPOSE: [Revision F. Added: Added video link for the DCA-8000 Battery Tester. Added: Supplemental Procedure Video.] This bulletin informs the dealership network that Harley-Davidson has provided…
  • M1555 Sep 12, 2024 · Warranty Program/Extension
    SERVICE BULLETIN M1555 (REV E): BATTERY WARRANTY GUIDELINES. PURPOSE: Revision E. Added: Added procedures for the DCA-8000 E Battery Tester.* Updated: All sections. This bulletin informs the dealership network that Harley-Davidson has provided guidelines f…
  • M1490 Aug 8, 2024 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 24.8.8): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Ver…
  • PAB1158 Jul 10, 2024 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1158: OIL FILTER PACKAGING AND CASE QUANTITY UPDATE. PURPOSE: To inform dealerships that Harley-Davidson has made updates to oil filters including new part numbers, packaging design, and bulk case quanti…
  • M1490 May 1, 2024 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1490 (V 24.6.4): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-…
  • M1612 Apr 4, 2024 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1612 (REV A): MILWAUKEE-EIGHT AND TWIN CAM TRANSMISSION GEAR PACKS. Purpose: Revision. Update: Notes for Table 3 and 4. * Updated: Part Numbers. This bulletin informs dealers that all: Twin Cam gear packs on CVO, Dyna, Police, Softail, To…
  • PAB1144 Dec 18, 2023 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1144: 2021-2022 SCREAMIN' EAGLE STAGE I (CARB) EO APPROVALS. PURPOSE: Revision. To inform California dealers about the new California Air Resources Board (CARB) approvals for select 2021-2022 Harley-Dav…
  • M1612 Dec 4, 2023 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1612: MILWAUKEE-EIGHT AND TWIN CAM TRANSMISSION GEAR PACKS. Purpose: This bulletin informs dealers that all: ⢠Twin Cam gear packs on CVO, Dyna, Police, Softail, Touring & Trike models and ⢠Milwaukee-Eight gear packs on CVO, Police, Sof…
  • M1612 Dec 4, 2023 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1612: MILWAUKEE-EIGHT AND TWIN CAM TRANSMISSION GEAR PACKS. Purpose: This bulletin informs dealers that all: • Twin Cam gear packs on CVO, Dyna, Police, Softail, Touring & Trike models and • Milwaukee-Eight gear packs on CVO, Police, Softa…
  • PAB1144 Nov 9, 2023 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1144: 2021-2022 SCREAMIN' EAGLE STAGE I (CARB) EO APPROVALS. PURPOSE: To inform California dealers about the new California Air Resources Board (CARB) approvals for select 2021-2022 Harley-Davidson vehic…
  • PAB1143 Oct 9, 2023 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1143: SCREAMIN EAGLE CARB APPROVALS. PURPOSE: To inform California dealers about the new California Air Resources Board (CARB) approvals. Screamin' Eagle Quickshifter and Screamin' Eagle Extreme Flow 55m…
  • M1611 Oct 23, 2023 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1611: MILWAUKEE-EIGHT TRANSMISSION SHIFT DRUM UPDATE. PURPOSE: This bulletin informs dealers of a transmission shift drum running change to all variants of the Milwaukee-Eight powertrain. Starting on October 4, 2023 all Milwaukee-Eight CVO…
  • PAB1142 Aug 21, 2023 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1142 (REV A): SCREAMIN EAGLE X OHLINS SPECIALTY TOOLS FOR SOFTAIL FORK KIT(S). PURPOSE: To inform dealerships about the Öhlins® specialty tools that are required for the installation of the Front Fork Ki…
  • M1600 Aug 10, 2023 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1600: 2023 MILWAUKEE EIGHT OIL PAN FASTENER CHANGE. PURPOSE: This bulletin informs dealers that there is a running change for the oil pan fastener on all Milwaukee-Eight powered Softail and Touring models. As of Monday July 31, 2023, Power…
  • M1586 Apr 28, 2023 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1586: SCREAMIN' EAGLE OIL PUMP INCORRECTLY MACHINED. PURPOSE: This bulletin informs dealers that Harley-Davidson has found a quality issue with the Screamin' Eagle Oil Pump and how to check inventory for this condition. Markets Affected: W…
  • M1507 Dec 21, 2022 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1507: LOW/NO CHARGING DIAGNOSTICS. Revision. PURPOSE: To inform the dealers of updated and new symptom-based diagnostics for the low or no charging symptom. Motorcycles Affected: 2017-2023 Touring and Trike platform; 2018-2023 Softail pl…
  • M1535 Mar 14, 2022 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1535: SERVICE MANUAL AND ISHEET HANDLEBAR INSTALLATION REQUIREMENTS UPDATE: MODULAR BRAKE LINE KITS. PURPOSE: This bulletin informs dealers that Harley-Davidson has identified incorrect information in the 2018-2021 Softail Service Manuals.…
  • M1535 Sep 20, 2021 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1535: SERVICE MANUAL UPDATES. PURPOSE: This bulletin informs dealers that Harley-Davidson has identified incorrect information in the 2018- 2021 Softail Service Manuals. These errors have been corrected and are visible on Service Informati…
  • TA0006 Jan 27, 2016 · Service Bulletin/Repair Instructions
    Harley-Davidson is aware of conditions that may result in a streaking appearance or film residue on the inside of some instrument gauges including speedometer and tachometers. This may occur after exposure of the vehicle to humid conditions. This condition…
  • TA0006 Jan 27, 2016 · Service Bulletin/Repair Instructions
    Harley-Davidson is aware of conditions that may result in a streaking appearance or film residue on the inside of some instrument gauges including speedometer and tachometers. This may occur after exposure of the vehicle to humid conditions. This condition…
  • M1514 Feb 11, 2021 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1514: 2020 SOFTAIL - CLUTCH RAMP RUNNING CHANGE. PURPOSE: Revision. To inform dealers of a running change to the inner and outer ramp of the clutch actuation system in all 2020 Softails built on and after March 15, 2020. Changing to the ne…
  • PAB1105 Sep 16, 2020 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1105: SCREAMIN' EAGLE CALIBRATIONS & SMART TUNE UPDATES. PURPOSE: To inform dealers, that new Screamin’ Eagle® calibrations are now available for 49 State application. These calibrations are for the laun…
  • PAB1103 Sep 4, 2020 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1103: SCREAMIN' EAGLE - NEW STAGE KIT CALIBRATION AVAILABILITY. PURPOSE: Revision. To inform dealers of Screamin’ Eagle® calibrations delayed availability. This delay covers the new Touring (119/122 ci) …
  • M1450 Sep 22, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1450: MILWAUKEE-EIGHT EQUIPPED VEHICLES - LOSS OF POWER OR HIGH ENGINE BRAKING. PURPOSE: Revision. 2017 - 2019 model motorcycles equipped with a Milwaukee-Eight™ engine can experience a condition known as sumping during extended periods a…
  • PAB1104 Aug 24, 2020 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1104: HIGH-FLOW EXHAUST SYSTEM – FITMENT UPDATE. PURPOSE: To inform dealers of Screamin’ Eagle® Touring High-Flow Exhaust System is now a 49-State compliant fitment for the 128/131 ci Stage IV Kit and 13…
  • PAB1093 Aug 31, 2020 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1093: NEW 2020.5 SCREAMIN' EAGLE PRODUCT UPDATES. PURPOSE: Revision. To inform dealers of additional Screamin’ Eagle® 128/131 Stage IV Kit and 131 Crate Engine information.
  • PAB1102 Aug 25, 2020 · Service Bulletin/Repair Instructions
    GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1102: SOFTAIL QUARTER FAIRING MOUNTING POST. PURPOSE: To inform dealers of Softail® Quarter Fairing warranty claims involving issues where the mounting posts are cracking.
  • M1510 Mar 19, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1510: MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. REVISION. PURPOSE: To inform dealers of an improved oil filter for the Milwaukee-Eight® (MKE-8) engine. The new oil filter uses the same synthetic 5-micron media as the current filter, however…
  • M1514 Mar 25, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1514: 2020 SOFTAIL - CLUTCH RAMP RUNNING CHANGE. PURPOSE: To inform dealers of a running change to the inner and outer ramp of the clutch actuation system in all 2020 Softails built on and after March 15, 2020. Changing to the new inner an…
  • M1510 Mar 19, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1510: MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. REVISION. PURPOSE: To inform dealers of an improved oil filter for the Milwaukee-Eight® (MKE-8) engine. The new oil filter uses the same synthetic 5-micron media as the current filter, howeve…
  • M1510 Mar 3, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1510: MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. PURPOSE: To inform dealers of an improved oil filter for the MKE-8 (Milwaukee-Eight®) engine. The new oil filter uses the same synthetic 5-micron media as the current filter, however, the ne…
  • M1509 Feb 13, 2020 · Service Bulletin/Repair Instructions
    SERVICE BULLETIN M1509: MILWAUKEE-EIGHT CYLINDER FLANGE NUT USAGE. To Inform dealers of a service manual change. This change affects the flange nut attaching the cylinder/cylinder head assembly to the cylinder stud in all MKE-8 (Milwaukee-Eight®) engines. …
Source: NHTSA manufacturer communications files.
About service bulletins