UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 15, 2005

                 CHASE MANHATTAN AUTO OWNER TRUST, SERIES 2003-B
                             (Issuer of securities)


                      CHASE BANK USA, NATIONAL ASSOCIATION
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


        United States               333-74600-04              22-2382028
------------------------------   -------------------   -------------------------
(State or other jurisdiction        (Commission             (IRS Employer
      of incorporation)             File Number)          Identification No.)


White Clay Center, Building 200, Newark, DE          19711
--------------------------------------------------------------------------------
(Address of principal executive offices)             (Zip Code)


Registrant's telephone number, including area code:  (302) 575-5000


--------------------------------------------------------------
(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_|   Written communications pursuant to Rule 425 under the Securities Act (17
      CFR 230.425)

|_|   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)

|_|   Pre-commencement communications pursuant to Rule 14d-2(b) under the
      Exchange Act (17 CFR 240.14d-2(b))

|_|   Pre-commencement communications pursuant to Rule 13e-4(c) under the
      Exchange Act (17 CFR 240.13e-4(c))
<PAGE>

Section 8 - Other Events

Item 8.01 Other Events.

Chase Bank USA, National Association is the registrant of the Chase Manhattan
Auto Owner Trust, Series 2003-B ("Series 2003-B"), which issued multiple classes
of Asset Backed Securities. On or about September 15, 2005, JPMorgan Chase Bank,
National Association, as Paying Agent, made the payments to the holders of the
Securities of Series 2003-B contemplated by the related Indenture.

A copy of the Monthly Statement to Securityholders with respect to such
distribution, delivered pursuant to the related Sale and Servicing Agreement, is
being filed as an exhibit to this Current Report on Form 8-K.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(c) Exhibits.

Exhibit No.       Description
-----------       -----------

   99.1           Monthly Reports with respect to the September 15, 2005
                  distribution.
<PAGE>

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                           CHASE BANK USA,
                           NATIONAL ASSOCIATION, as Servicer


                           By: /s/ Patricia M. Garvey
                               ---------------------------------
                           Name:  Patricia M. Garvey
                           Title: Vice President
                           Date:  September 16, 2005
<PAGE>

                                INDEX TO EXHIBITS

Exhibit No.       Description
-----------       -----------

   99.1           Monthly Reports with respect to the distribution to
                  Securityholders on September 15, 2005.
{"company-data": {"conformed-name": "CHASE MANHATTAN AUTO OWNER TRUST 2003-B", "cik": "0001256073", "assigned-sic": "6189", "irs-number": "000000000", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-74600-04", "film-number": "051090416"}, "business-address": {"street1": "C/O WILMINGTON TRUST CO", "street2": "1100 NORTH MARKET ST. RODNEY SQU. N.", "city": "WILMINGTON", "state": "DE", "zip": "19890"}, "mail-address": {"street1": "C/O WILMINGTON TRUST CO", "street2": "1100 NORTH MARKET ST. RODNEY SQU. N.", "city": "WILMINGTON", "state": "DE", "zip": "19890"}, "former-company": {"former-conformed-name": "CHASE MANHATTAN BANK USA AUTO OWNER TRUST 2003-B", "date-changed": "20030723"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 15, 2005

                 CHASE MANHATTAN AUTO OWNER TRUST, SERIES 2003-B
                             (Issuer of securities)

                      CHASE BANK USA, NATIONAL ASSOCIATION
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)

        United States               333-74600-04              22-2382028
------------------------------   -------------------   -------------------------
(State or other jurisdiction        (Commission             (IRS Employer
      of incorporation)             File Number)          Identification No.)

White Clay Center, Building 200, Newark, DE          19711
--------------------------------------------------------------------------------
(Address of principal executive offices)             (Zip Code)

Registrant's telephone number, including area code:  (302) 575-5000

--------------------------------------------------------------
(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_|   Written communications pursuant to Rule 425 under the Securities Act (17
      CFR 230.425)

|_|   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)

|_|   Pre-commencement communications pursuant to Rule 14d-2(b) under the
      Exchange Act (17 CFR 240.14d-2(b))

|_|   Pre-commencement communications pursuant to Rule 13e-4(c) under the
      Exchange Act (17 CFR 240.13e-4(c))
Section 8 - Other Events

Item 8.01 Other Events.

Chase Bank USA, National Association is the registrant of the Chase Manhattan
Auto Owner Trust, Series 2003-B ("Series 2003-B"), which issued multiple classes
of Asset Backed Securities. On or about September 15, 2005, JPMorgan Chase Bank,
National Association, as Paying Agent, made the payments to the holders of the
Securities of Series 2003-B contemplated by the related Indenture.

A copy of the Monthly Statement to Securityholders with respect to such
distribution, delivered pursuant to the related Sale and Servicing Agreement, is
being filed as an exhibit to this Current Report on Form 8-K.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(c) Exhibits.

Exhibit No.       Description
-----------       -----------

   99.1           Monthly Reports with respect to the September 15, 2005
                  distribution.
SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                           CHASE BANK USA,
                           NATIONAL ASSOCIATION, as Servicer

                           By: /s/ Patricia M. Garvey
                               ---------------------------------
                           Name:  Patricia M. Garvey
                           Title: Vice President
                           Date:  September 16, 2005
INDEX TO EXHIBITS

Exhibit No.       Description
-----------       -----------

   99.1           Monthly Reports with respect to the distribution to
                  Securityholders on September 15, 2005.