Steering angle sensor

A steering angle sensor measures how far and how fast the steering wheel is being turned, and passes that angle to the car's stability and power steering systems. It sits in the steering column just behind the wheel, often built into the clockspring, and it needs calibrating after repairs or a wheel alignment so the car knows where straight ahead is.Stability control, traction control, and electric power steering all lean on its reading, and so do adaptive lights and lane systems on newer cars. Diagnostic tools shorten the name to SAS, and catalogues sometimes list it as a steering wheel angle sensor or a steering position sensor. The reading is reported in degrees either side of centre.When a steering angle sensor goes bad, the stability control usually switches itself off. The ESP and traction lights come on, steering assist can feel uneven or heavy on cars with electric power steering, and a fault code for implausible steering angle data goes into memory.Before buying anything, it's worth knowing that a recalibration with a scan tool often clears these symptoms without a new part, because alignments and battery disconnects upset the sensor's zero point. If calibration won't take or won't hold, the sensor itself is next. The signs:

• ESP or traction control light: The system stops trusting the angle it's given and shuts off.
• Warnings after a battery change or alignment: Usually lost calibration rather than a failed sensor.
• Heavy or uneven power steering: Electric assist systems use the angle reading to shape their help.
• A wheel that reads off-centre: The car believes straight ahead is somewhere else.
• Codes for implausible steering angle data: The usual wording scan tools attach to this fault.
• Dead wheel buttons or horn alongside: On cars where the SAS shares the clockspring, the combined unit is failing.

Parthunt24 lines up used steering angle sensor listings from major marketplaces like Ovoko, ProxyParts, eBay, TotalParts, Opisto, Ecooparts, Ricambipro, and Autoparts24 in a single list. 130 offers show their steering angle sensor price, connector, and donor car details together.

Several different parts are sold under this name.Many steering angle sensors are built into the clockspring, so the part on offer is often a combined unit, and it has to match your steering system, hydraulic, electro-hydraulic, or fully electric, as well as the stability control fitted.Begin with the OEM number, noting that numbers often end in a revision letter, where later letters usually replace earlier ones, though it's worth confirming before paying. The plug and its pin count have to match your loom, the unit has to suit your column and clockspring design, and almost every steering angle sensor needs calibrating with a diagnostic tool once fitted.Select the make and model beside the listings on the left, and matching steering sensors alone stay. Clicking one sends you to its original marketplace to read the full details and buy there.

• Vehicle make, model, and year: Steering systems often differ between generations and facelift models.
• OEM part number: The most reliable way to confirm exact compatibility.
• Engine type and engine code: Some steering systems vary with the engine or drivetrain configuration.
• Steering system type: Hydraulic, electro-hydraulic, and electric power steering can use different sensors.
• Connector type: The electrical connector must match the vehicle wiring harness.
• Number of pins: Sensors with different electrical configurations aren't interchangeable.
• Steering column or clockspring compatibility: Many steering angle sensors are integrated with the clockspring or column module.
• ESP/ABS compatibility: The sensor must work with the vehicle's stability and braking systems.
• Calibration requirements: Most sensors need calibrating with a diagnostic tool after installation.
• Condition of the sensor housing and connector: Check for broken tabs, damaged pins, cracks, or corrosion.

With the original advert in front of you, check the fragile parts first.The plug and the housing are the weak points on combined units, so the photos that matter show the connector pins straight and the casing free of cracks, with every mounting tab still attached.Then go down the listing:

• Photos: The plug, the housing from both sides, the tabs, and the printed number.
• Seller reputation: Someone who has sold electronics before, with feedback to show for it.
• Compatibility: The full number including its revision letter against your own.
• Included components: Sensor alone, or the complete clockspring unit with connectors?
• Condition: Cracked casings, bent pins, snapped tabs, or a ribbon pulled out of place.
• Testing: Removed from a running car with no steering-related codes stored.
• Warranty and returns: Valuable here, since a fault can appear only after calibration.
• Shipping: Combined units should ship supported so the ribbon inside can't unwind.
• Documentation: The donor vehicle, its build year, and which systems it carried.

If the number, pins, and housing all pass, finish the purchase on the marketplace the listing came from, and book the calibration for the same day.

The steering angle sensor price depends mostly on how much comes attached to it.A separate used sensor from a mainstream car costs about €15-€40, a combined clockspring and sensor unit €40-€90, and versions for premium or rare models €90-€180.Parthunt24's steering angle sensor listings currently open at 5.00. What sets the listings apart:

• Separate or combined: A unit with the clockspring built in carries the higher price.
• Steering system: Sensors for electric power steering tend to cost more than older types.
• Model rarity: Popular cars mean plentiful donors and low prices.
• Systems supported: Versions that also serve lane and light systems are priced above basic ones.
• Condition: Unbroken tabs and clean pins are what the money buys.
• Donor details stated: A listing that names the exact donor car saves guesswork.

Sort by steering angle sensor price, weigh the offers against each other, and the best deal for your column is simple to pick out from the Parthunt24 page.

After a steering angle sensor replacement, the calibration is part of the job rather than an extra, and the parts around the sensor deserve a look while the trim is off. Check these on Parthunt24:

• Clock spring: The ribbon unit the sensor is often built into, and the usual joint failure.
• Steering column: Carries the sensor and the lock, and wears at its joints.
• Steering wheel axle: The shaft whose rotation the sensor is actually measuring.
• Steering rack: Wear here means the road wheels no longer follow the steering wheel exactly.
• Steering rack control module: The electronics that act on the sensor's reading in electric racks.
• Power steering control module: Manages the assist, and shares fault codes with the sensor circuit.
• Power steering pump: Provides the assist in hydraulic systems, and gets noisy and weak with age.
• Steering wheel: Comes off during this job, so inspect its buttons and trim while it's out.

Calibrate after every job that touches the column, the battery, or the alignment, because an uncalibrated sensor lights the same warnings as a broken one.

Plenty of steering angle sensor purchases start the same way. The car comes back from an alignment or a battery swap, the ESP light refuses to leave, and the first hour goes on forum threads before the part search even begins. When it does turn out to be the sensor, the shopping shouldn't take another evening.Parthunt24 puts every used steering angle sensor from Europe's dismantling market on one page, each with its steering angle sensor price, connector, and donor car listed. The sellers keep their own pages and their own checkouts, and nothing is added on top. Compare offers across the whole market, check the number against your column, and get the right steering angle sensor at the lowest price available for your car.