HF 2529: Providing for the repair of a diesel exhaust fluid system that is part of farm equipment, and providing penalties

What it does

735). The bill provides for circumstances in which farm equipment is subject to repair due to a fault in the DEF system. The bill provides that a manufacturer must make certain items related to the DEF system available to a person holding a legal interest in the farm equipment (interest holder) in the same manner and to the same extent as the manufacturer makes such items available to the manufacturer’s authorized repair providers doing business in the same region as the interest holder. The items include diagnostic and repair information, including technical updates, replacement parts, and diagnostic repair tools.

Senate subcommittee · named March 10, 2026

• Sen. Kerry Gruenhagen (R) · kerry.gruenhagen@legis.iowa.gov
• Sen. Izaah Knox (D) · izaah.knox@legis.iowa.gov
• Sen. Scott Webster (R) · scott.webster@legis.iowa.gov

Lobbying · 5 for, 5 against

For: Iowa Cattlemen's Association; Iowa Corn Growers Association; Iowa Farmers Union; Iowa Pork Producers Association; Iowa Soybean Association

Against: Association of Equipment Manufacturers (AEM); Caterpillar; Deere & Company; Iowa Association of Business and Industry (ABI); Iowa Nebraska Farm Equipment Dealers Association

In plain words

1. February 5, 2026Filed in the House and sent to the Agriculture committee · as HSB 684
2. February 5, 2026House subcommittee named: Wulf, Hora and Judge · as HSB 684
3. February 10, 2026Subcommittee recommended passing it · as HSB 684
4. February 10, 2026Approved by the House committee · as HSB 684
5. February 10, 2026Committee vote: 12–11 · as HSB 684
6. February 16, 2026Filed in the House
7. February 16, 2026Approved by the House committee, and given a new number: HF 2529 · as HSB 684
8. March 2, 2026Passed the House, 57–33
9. March 3, 2026Arrived in the Senate
10. March 10, 2026Senate subcommittee named: Gruenhagen, Knox and Webster