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Horn Switch Assembly 158-6632 1586632 Fits for Caterpillar CAT Engine 3126B 3408E 3306 3508B C9 C18 C6.6 Loader 953C 963C 973C Replacement is backordered and will ship as soon as it is back in stock.
Powering 10,000+ Commercial Fleets
One Year Warranty
Easy 60-day Return
Expert support & Fitment Guarantee
High-performance aftermarket horn switch assembly engineered for reliable operator control in Caterpillar CAT engines, dozers, loaders, pipelayers, and rotary mixers. Precision-manufactured for drop-in compatibility and consistent switching performance in demanding construction and industrial environments.
Fits Part Numbers: CA1586632, 158-6632, 1586632
Condition: New, aftermarket replacement
Function: Operator horn switch assembly for cab control systems
Fits Caterpillar CAT Engines:
Fits Caterpillar CAT Dozers:
Fits Caterpillar CAT Loaders:
Fits Caterpillar CAT Pipelayers:
Fits Caterpillar CAT Rotary Mixers:
The horn switch assembly is a critical component of your equipment's operator control system, providing reliable signaling for safe site communication and operation. This replacement unit delivers:
1 × Horn Switch Assembly (158-6632)
Essential for equipment maintenance, switch replacement, and preventive service. Keep your Caterpillar CAT dozers, loaders, pipelayers, and engines fully operational and safe on every job site.
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Estimated delivery time 3-6 workdays
We don't have a core charge for any products.
To start a return, please use our return portal. Items should be unused, not installed, clean, in their original packaging and accompanied by proof of purchase. Please contact support if you need help with the current return instructions or applicable costs.
Orders placed within one hour and not yet fulfilled can be cancelled from the customer order page. After one hour, or once the order has been fulfilled, please contact support for the next steps.
Available payment methods include major credit and debit cards, PayPal, Apple Pay, Google Pay, Shop Pay and Klarna. Availability can vary by order and checkout, so the payment options shown at checkout apply.
Most packages delivered within New Zealand arrive in 4–7 working days. Packages over 68 kg can take 5–10 working days. Timing can also vary with product availability, destination, shipping service, customs processing, weekends, public holidays or carrier delays.
New Zealand orders are billed in NZD.
Compare the listed part number, machine make, model, engine details and specifications with your equipment records. Fitment can vary by configuration and serial range, so contact support with the part number and machine details if you are unsure. Fitment should be confirmed before installation.
Mailed & Couriered Shipments (Online Shopping)
For NZ$1,000 or less goods value, no customs duty or border entry fees are collected by the New Zealand Customs Service.
For over NZ$1,000 customs value, formal customs entry is required and the customer must pay 15% GST, applicable customs duties, and border processing fees such as the Import Entry Transaction Fee.
High-performance aftermarket horn switch assembly engineered for reliable operator control in Caterpillar CAT engines, dozers, loaders, pipelayers, and rotary mixers. Precision-manufactured for drop-in compatibility and consistent switching performance in demanding construction and industrial environments.
Fits Part Numbers: CA1586632, 158-6632, 1586632
Condition: New, aftermarket replacement
Function: Operator horn switch assembly for cab control systems
Fits Caterpillar CAT Engines:
Fits Caterpillar CAT Dozers:
Fits Caterpillar CAT Loaders:
Fits Caterpillar CAT Pipelayers:
Fits Caterpillar CAT Rotary Mixers:
The horn switch assembly is a critical component of your equipment's operator control system, providing reliable signaling for safe site communication and operation. This replacement unit delivers:
1 × Horn Switch Assembly (158-6632)
Essential for equipment maintenance, switch replacement, and preventive service. Keep your Caterpillar CAT dozers, loaders, pipelayers, and engines fully operational and safe on every job site.