|        |
|--------|
|   |

|        |
|--------|
|   |

|                                                               |        |                                     |
|---------------------------------------------------------------|--------|-------------------------------------|
| Delaware                                                      |   | 36-3482074                          |
| (State or other jurisdiction ofincorporation or organization) |   | (I.R.S. EmployerIdentification No.) |
| 2800 E. 13th Street, Ames, Iowa                          |   | 50010                               |
| (Address of principal executive offices)                      |   | (Zip Code)                          |

|                                         |        |                                             |
|-----------------------------------------|--------|---------------------------------------------|
| Common Stock, par value $0.01 per share |   | New York Stock Exchange                     |
| (Title of each class)                   |   | (Name of each exchange on which registered) |

|        |                           |        |                     |        |                                                                           |        |                             |
|--------|---------------------------|--------|---------------------|--------|---------------------------------------------------------------------------|--------|-----------------------------|
|   | Large accelerated filer o |   | Accelerated filer x |   | Non-accelerated filer o (Do not check if a smallerreporting company) |   | Smaller reporting company o |

----

|                                             |        |          |
|---------------------------------------------|--------|----------|
|                                        |   | Page No. |
|                                        |   |     |
| Explanatory Note                            |   | 1        |
|                                        |   |     |
| Part IV                                     |   |     |
|                                        |   |     |
| Item 15.  Exhibits and Financial Statements |   | 2        |
|                                        |   |     |
| Signatures                                  |   | 3        |
|                                        |   |     |
| Index to Exhibits                           |   | 5        |

----

----

|                             |                                                             |
|-----------------------------|-------------------------------------------------------------|
| (a)     | The following documents are filed as a part of this report. |

|                             |          |
|-----------------------------|----------|
| (3)     | Exhibits |

|             |        |                                                                                                                                                                                                                            |
|-------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Exhibit No. |   | Description of Document                                                                                                                                                                                                    |
| 21          |   | Subsidiaries of the Registrant.                                                                                                                                                                                       |
| 24          |   | Powers of Attorney granted by directors and executive officers (incorporated herein by reference to the signature page of the Original Form 10-K filed with the SEC on March 3, 2011).                                |
| 31.1        |   | Certification by the Chief Executive Officer Pursuant to Rule 13a-14(a).                                                                                                                                         |
| 31.2        |   | The Registration Rights Agreement is attached as Exhibit 10.1(b) to Amendment No. 1 to the Company's Form S-1 Registration Statement filed on April 23, 1998, and is incorporated herein by reference. |

|                             |                                                                                                               |
|-----------------------------|---------------------------------------------------------------------------------------------------------------|
| (b)     | The exhibits that are listed under Item 15(a)(3) above are filed or incorporated by reference hereunder. |

----

|        |                         |        |                                                                          |
|--------|-------------------------|--------|--------------------------------------------------------------------------|
|   | SAUER-DANFOSS INC. |
|   | By:                     |   | /s/ KENNETH D. MCCUSKEY                                             |
|   |                    |   | Kenneth D. McCuskeyVice President and Chief AccountingOfficer, Secretary |

|                                      |        |                                                        |        |                |
|--------------------------------------|--------|--------------------------------------------------------|--------|----------------|
| Signature                            |   | Title                                                  |   | Date           |
|                                 |   |                                                   |   |           |
| /s/ SVEN RUDER                  |   | Director and President and Chief Executive Officer     |   | March 16, 2011 |
| Sven Ruder                           |   |                                                   |   |           |
|  /s/ JESPER V. CHRISTENSEN |   | Executive Vice President and Chief Financial Officer   |   | March 16, 2011 |
| Jesper V. Christensen                |   |                                                   |   |           |
|  /s/ KENNETH D. MCCUSKEY   |   | Vice President and Chief Accounting Officer, Secretary |   | March 16, 2011 |
| Kenneth D. McCuskey                  |   |                                                   |   |           |
|  *                              |   | Director                                               |   | March 16, 2011 |
| Niels B. Christiansen                |   |                                                   |   |           |
|  *                              |   | Director                                               |   | March 16, 2011 |
| Jørgen M. Clausen             |   |                                                   |   |           |
|  *                              |   | Director                                               |   | March 16, 2011 |
| Kim Fausing                          |   |                                                   |   |           |

----

|                        |        |          |        |                |
|------------------------|--------|----------|--------|----------------|
| Signature              |   | Title    |   | Date           |
|                   |   |     |   |           |
| *                      |   | Director |   | March 16, 2011 |
| Richard J. Freeland    |   |     |   |           |
|  *                |   | Director |   | March 16, 2011 |
| Per Have               |   |     |   |           |
|  *                |   | Director |   | March 16, 2011 |
| William E. Hoover, Jr. |   |     |   |           |
|  *                |   | Director |   | March 16, 2011 |
| Johannes F. Kirchhoff  |   |     |   |           |
|  *                |   | Director |   | March 16, 2011 |
| Anders Stahlschmidt    |   |     |   |           |
|  *                |   | Director |   | March 16, 2011 |
| Steven H. Wood         |   |     |   |           |

|        |        |                                     |
|--------|--------|-------------------------------------|
| *By:   |   | /s/ KENNETH D. MCCUSKEY        |
|   |   | Kenneth D. McCuskeyAttorney-in-Fact |

----

|             |        |                                                                                                                                                                                        |
|-------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Exhibit No. |   | Description of Document                                                                                                                                                                |
| 21          |   | Subsidiaries of the Registrant.                                                                                                                                                        |
| 24          |   | Powers of Attorney granted by directors and executive officers (incorporated herein by reference to the signature page of the Original Form 10-K filed with the SEC on March 3, 2011). |
| 31.1        |   | Certification by the Chief Executive Officer Pursuant to Rule 13a-14(a).                                                                                                          |
| 31.2        |   | Certification by the Chief Financial Officer Pursuant to Rule 13a-14(a).                                                                                                          |