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A Direct Fix for Airbag, Horn, and Steering-Angle Faults

If your Ram throws an airbag lamp, the horn goes dead, or the ESC light refuses to clear, the spiral cable behind the steering wheel is the usual culprit. The Koeep Clock Spring for Ram 1500, 2500, 3500, Laramie and Dodge Viper (Without Heated Wheel) is a drop-in replacement for those trucks and the Gen V Viper.

One assembly carries the circuits that fail first: driver airbag (SRS), horn, cruise control, steering wheel audio switches, and the steering angle sensor (SAS). The non-heated-wheel design runs a 6-channel ribbon cable with gold-plated terminals rated for 500,000+ full-lock steering cycles, built under ISO 26262 ASIL-B traceability for steering column safety electronics.

Fitment and OEM Cross-Reference

This unit is a direct functional replacement for six Mopar numbers: 5156104AD, 5156104AE, 5156104AF, 68141880AA, 68222838AA, and 5NN30DX9AA (Viper). Coverage breaks down like this:

• Ram 1500 / 2500 / 3500 — 2009–2024 model years
• Ram Laramie trims — all non-heated-wheel configurations
• Dodge Viper SRT — 2013–2017, Gen V

Check one thing before ordering: the heated-wheel sales code. NHS or NHK on the vehicle means the wheel is heated. This part is built for non-heated wheels only — the 6-channel ribbon leaves out the high-current heating circuit, which also removes the thermal degradation risk seen on OEM heated-wheel units.

Koeep carries sibling listings for the same application family, so compare the Clock Spring without Heated Steering Wheel for RAM 1500 2500 3500 Laramie Dodge Viper and the 68110739AB clock spring without heated wheel to match the part number your invoice expects.

Engineering Deep-Dive: Why OEM Units Fail

Ribbon cable and dielectric

OEM clock springs use a PET-film substrate. Cycled between −40°C and +105°C cabin-soak temperatures, the film develops micro-cracks at the fold points. Dendritic growth and trace fractures follow, resistance climbs, and the SRS module logs a fault. Koeep swaps in a UL 94 V-0 rated liquid crystal polymer (LCP) dielectric with 0.125mm pitch copper-alloy traces to shut that failure mode down.

Housings and contacts

Upper and lower rotor housings are injection-molded 30% glass-fiber-reinforced PBT with a 195°C heat deflection temperature per ASTM D648 — relevant where sunbelt column shrouds regularly pass 90°C. Contacts are selective gold-plated phosphor bronze, 0.8μm Au over 2.5μm Ni, specified to IEC 60512-2-1 for contact resistance below 10mΩ after accelerated aging.

Detent mechanism and SAS sync

A hardened 440C stainless steel pawl runs in an acetal (POM) race, keeping feedback consistent lock-to-lock. The SAS index pulse is factory-synchronized to rotor neutral, so ESP/ESC recalibration is plug-and-play on Rams with Bosch 9.0/9.1 ABS modules and on the Viper's Continental Teves Mk100 ESC.

SAS output runs dual-mode: SAE J2716 SENT (single-edge nibble transmission) where the module supports it, plus traditional analog voltage-divided output for legacy electronics. That covers model years 2009 through 2026 on one part.

Endurance in numbers: SAE J2579 Class B demands 300,000 full-lock steering cycles. This Koeep unit is validated to 500,000 — 67% more — with a dielectric that eliminates the PET-film micro-fracture failure and CAN signaling conforming to SAE J2284-5 at 500 kbps and CAN FD at 2 Mbps.

Technical Specification Matrix

DTC Mapping: What This Part Clears

Replace the unit, clear codes with a J2534 pass-thru or compatible scan tool, and these fault families should stay gone across Stellantis platforms from MY2009 through the current 2026 production cycle:

• B0001-B0028 — airbag and squib circuit faults, including B0001-1B (driver airbag circuit resistance too high), B0012-01, B0013-02, B0028
• C0040-C0052 — steering angle sensor plausibility and calibration faults
• P0622 — generator field control fault reported over the LIN-bus
• U0140 / U0141 — lost communication with the BCM or ABS module
• U0428 — steering angle sensor data invalid

Installation: Centering Is Everything

Every unit ships with a factory-calibrated locking pin and a ±2.5° centering tolerance. The pin holds the rotor at true mechanical center — pull it early and the calibration is gone before the part is mounted.

1. Leave the locking pin in place until the clock spring is fully seated on the steering column.
2. Verify true center: from the locked position, the rotor should turn gently about ±1.25 turns lock-to-lock in both directions.
3. Run the SAS recalibration routine: ignition ON, engine OFF, steering wheel full-left → full-right → center.
4. Finish with a scan tool capable of SAS calibration — Snap-on, Autel, or OEM wiTECH 2.0 — and clear stored DTCs.

Skip the recalibration or mount the spring off-center and C0040 comes right back. If the pin was removed early and the rotor spun past its ±2.5° calibrated range, the SAS index pulse is permanently offset.

Frequently Asked Questions

Order, Quotes, and Support

Buying for a fleet or a shop? Reach the Koeep team through any of these channels:

• Request for Quote — bulk and fleet pricing
• support@koeep.com — fitment and order questions
• WhatsApp — fast replies during business hours

Browsing wider? The Wheels, Tires & Parts catalog covers the rest of the store, and if you service other makes, the guide to rear ceramic brake pads for the 2005-2012 Acura RL walks through performance gains and installation benefits.