25 Products
ARNOTT Car Parts
Arnott supplies components for electronically controlled air suspension. The products here include individual air springs, complete air suspension struts, compressors, compressed-air valves, conventional or electronically relevant shock absorbers and headlight or ride-height sensing parts. References such as A-2571, AS-2785, P-2514, VB-3831 and RH-3706 identify different system roles; shared brand and similar appearance do not make them interchangeable.
Begin with a full system diagnosis. A vehicle sitting low can have a leaking spring or line, a valve-block fault, sensor or linkage damage, wiring trouble, compressor protection shutdown, pressure loss or a control-module condition. The current AutoMotoPart selection contains 25 Arnott items, led by 8 air suspension strut entries, 6 compressor, compressed-air system entries, 5 air spring, suspension entries, 2 sensor, headlight levelling entries. These Arnott figures describe the range on this page rather than every product the brand may make elsewhere.
Confirm VIN-derived vehicle data, axle, left or right position, suspension option, electronic damping or level-control equipment, connector and mounting style. Keep the complete Arnott reference and any paired left/right number. Compare airline fittings, upper and lower mountings, bracket location, sensor links and electrical plugs. A right-front air spring cannot be inferred to suit the left, and a strut for a vehicle without electronic control may not suit a visually similar controlled system.
Air suspension combines heavy vehicle loads, stored pneumatic pressure and automatic height correction. Disable automatic levelling by the vehicle procedure, depressurise the correct circuit and support the body and axle independently before disconnecting a line or strut. Never lower the vehicle onto an uninflated air spring unless the exact instructions require and control it. Diagnose leaks before fitting a compressor, align air connections without thread damage, and complete prescribed filling, calibration, ride-height and alignment checks. Keep people clear during initial inflation. The Arnott range below is reference-led; final selection and installation depend on current vehicle and product instructions.
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Arnott: understand the range before choosing
Arnott specialises in replacement air-suspension components. Its official range includes air springs, complete struts, compressors, valve blocks, dampers and ride-height sensors. The current AutoMotoPart selection follows that system closely: eight air struts, six compressors, five air springs, two shocks, two compressed-air valves and two levelling sensors are represented under distinct A, AS, P, SK, VB and RH reference families.
AutoMotoPart currently lists 25 Arnott items. The largest Arnott groups are 8 air suspension strut entries, 6 compressor, compressed-air system entries, 5 air spring, suspension entries, 2 sensor, headlight levelling entries. Arnott totals can change, so a category count is orientation rather than proof that a particular reference suits a vehicle, workplace or job. The exact Arnott listing, its current technical information and the item in front of you must agree.
What the Arnott page actually covers
| Product group in this range | Current entries | Selection focus |
|---|---|---|
| Air Suspension Strut | 8 | Match axle, side, air-spring shape, top and bottom mountings, paired reference and suspension options. |
| Compressor, compressed-air system | 6 | Confirm complete strut versus separate spring, damping control, connector, bracket, mountings and left/right position. |
| Air Spring, suspension | 5 | Diagnose system leaks and relay, fuse, wiring, valve and intake condition before matching compressor and fittings. |
| Sensor, headlight levelling | 2 | Match sensor role, linkage orientation, connector, mounting points and calibration procedure. |
| Shock Absorber | 2 | Confirm shock position, damping system, mounting type and whether it works with the vehicle's air spring. |
| Valve, compressed-air system | 2 | Match valve function, port layout, airlines, electrical connection and exact pneumatic-system architecture. |
Nineteen of the 25 entries are directly described as air-suspension struts, compressors or springs. Sample evidence also shows meaningful qualifiers: right-front versus front or rear, top yoke with bottom fork, pin, eye or yoke, ADS or Airmatic DC, with or without electronic suspension control, and paired references. These details are selection controls, not optional descriptive text.
Build a reliable shortlist
Treat the system as pneumatic, mechanical and electronic at once. Record fault codes, commanded and actual heights, compressor run time and which corner drops over a known period. Then inspect the bellows, lines, fittings, valve block, reservoir, sensor links and wiring. Replacing the loudest or most visible part without the leak path can create repeat failure.
| Check | Why it matters | Useful evidence |
|---|---|---|
| Vehicle build | Air-suspension layouts and control options change within one model | VIN, build date, suspension codes and current application data |
| Position | Front, rear, left and right parts can use different geometry and ports | Repair diagram and complete Arnott position or paired reference |
| Control system | Electronic damping, ADS and level control alter strut and connector requirements | Vehicle equipment scan and exact product qualifiers |
| Mountings | Fork, yoke, pin and eye interfaces are not interchangeable | Upper and lower hardware compared with published dimensions |
| Pneumatic interface | Airline size, fitting and port orientation must seal without strain | Arnott instructions and clean undamaged airline end |
| Causal fault | Leaks or sensor errors can overload a replacement compressor | Pressure, leak, electrical and calibration diagnosis before ordering |
Do not adapt airlines with general pneumatic fittings, drill brackets or transfer an electrical connector to overcome a mismatch. If a part needs modification to align, stop and recheck the Arnott number, chassis option and vehicle ride-height system.
Air springs and complete air struts
An air spring carries vehicle load through a reinforced flexible bellows. A complete air strut combines that spring function with a damper and mounting assembly. Determine which format the vehicle uses before dismantling. Inspect bellows folds, crimp rings, piston surfaces, top seal, damper leakage and neighbouring heat shields. Soapy leak detection is useful only where the approved procedure permits it and the system can be operated safely.
New bellows must not be twisted or folded incorrectly. Protect them from tools and contamination, and align markings and lower piston orientation as instructed. Do not tighten bonded or positional mountings at an arbitrary suspension height. During initial fill, support the vehicle so the spring takes shape within its intended range; uncontrolled full droop or lowering onto an empty bellows can damage it.
Compressor diagnosis before replacement
Arnott technical guidance describes the compressor as the source of system pressure and warns that frequent or continuous running from a leak can overheat it. Check why the old unit failed. A leaking spring, airline or valve, restricted intake, failed relay, voltage drop, blocked dryer path or incorrect height signal can produce low pressure and long run time.
Verify fuse and relay condition, battery voltage, earth, connector heat damage and compressor command before fitting. Replace supplied intake, relay, line or bracket items exactly as instructed and keep dirt out of open ports. Never bench-run a compressor against a blocked outlet or power it with improvised unfused leads. After repair, measure build time and duty behaviour rather than assuming noise means normal operation.
Valves, pressure retention and corner isolation
A valve block directs air between compressor, reservoir and individual springs. Internal leakage, contamination or an electrical solenoid fault can allow a corner or axle to sink while parked. Isolate causes by the vehicle diagnostic method; a vehicle dropping at one corner can still have a line or bellows leak, while several corners can reflect valve or supply behaviour.
Label every airline and connector before removal. Release collets and cut line ends only by the fitting instructions so the sealing surface stays square and unscored. Do not use sealant tape or workshop oil on push-fit connections unless specified. Match VB port layout and electrical connection exactly, then check for cross-connected corners during controlled filling and height response.
Height sensors, headlight levelling and calibration
The two RH references are described as headlight-levelling sensors, but their link position can also provide suspension or body-height information depending on vehicle architecture. Inspect the arm, ball joints, bracket, connector and wiring. A seized link can break when the vehicle is lifted, and installing the arm inverted can create an implausible signal or reversed movement.
Record sensor values before replacement where possible. Fit the linkage with the suspension at the position stated and check its travel without contacting the body or control arm. Electronic calibration or basic settings may be required after sensor, strut or ride-height work. Headlamp aim and suspension height are separate outcomes that may each require verification.
Safe lifting, filling and return to service
Air suspension may self-level after a door opens, ignition changes or a diagnostic command. Use the vehicle's jacking or workshop mode and disable activation before lifting. Support the chassis and relevant axle securely; never rely on trapped air or the system compressor to hold the vehicle. Depressurise the correct corner with suitable diagnostic or service equipment and keep face and hands away from fittings.
After assembly, inspect every fastener, airline route, heat shield and cable before controlled inflation. Follow Arnott and vehicle pressure or height sequence, clear faults only when appropriate and check the compressor does not run excessively. Measure ride height on level ground, complete required wheel alignment and road-test cautiously. A lean, warning, harsh impact, repeated compressor operation or abnormal headlamp aim needs immediate reinspection.
From identification to a checked result
| Stage | Good practice for this range | Mistake to avoid |
|---|---|---|
| Diagnose | Record heights, codes, leak pattern, compressor duty and sensor data | Replacing the compressor because the vehicle is low |
| Identify | Match chassis, position, suspension option, mountings and full Arnott code | Ordering from appearance or model name alone |
| Make safe | Disable levelling, support loads and depressurise by the correct method | Disconnecting a charged line or relying on air to support the vehicle |
| Install | Protect bellows, lines, connectors and mountings, then fill in sequence | Twisting an air spring or lowering the vehicle while uninflated |
| Verify | Leak-test, calibrate, measure height, align and monitor compressor operation | Returning to service with repeat cycling or a suspension warning |
Record every Arnott reference, axle position, pressure or leak result, ride-height measurement and calibration performed. Keeping the paired left/right numbers and pre-repair fault data makes a repeat drop or compressor cycle much easier to trace.
Reading real Arnott references
The Arnott names below are examples from the current range and show why the complete description matters. They are not universal Arnott recommendations and should not be treated as a fitment list. Within Arnott, a shared family word can conceal a different dimension, connector, material, pack format, operating condition or installation side.
| Example listing | What to verify beyond the name |
|---|---|
| Arnott A-2571 Air Spring, suspension | Axle, side, full Arnott code, paired reference and suspension option |
| Arnott A-2691 Air Spring, suspension | Air spring versus strut, mountings, damping control and connector |
| Arnott A-2724 Air Spring, suspension | Compressor output, relay, intake, dryer, leak cause and supplied fittings |
| Arnott A-3303 Air Spring, suspension | Valve ports or sensor linkage, calibration, ride height and alignment |
| Arnott A-3891 Air Spring, suspension | Axle, side, full Arnott code, paired reference and suspension option |
| Arnott AS-2785 Air Suspension Strut | Air spring versus strut, mountings, damping control and connector |
| Arnott AS-2795 Air Suspension Strut | Compressor output, relay, intake, dryer, leak cause and supplied fittings |
| Arnott AS-2892 Air Suspension Strut | Valve ports or sensor linkage, calibration, ride height and alignment |
The examples use clear prefixes: A for air springs, AS for struts, P for compressors, RH for sensors, SK for shocks and VB for valves. The prefix is only a starting point. Keep the complete Arnott number and all position qualifiers through installation and calibration.
Common errors around Arnott products
- Replacing an Arnott compressor without locating a system leak or electrical cause.
- Disconnecting an airline while the circuit remains pressurised.
- Allowing automatic levelling to operate while the vehicle is lifted or dismantled.
- Confusing a complete air strut with a separate air spring.
- Ignoring left, right, axle or paired-reference information.
- Lowering full vehicle weight onto an air spring before controlled inflation.
- Cross-connecting valve-block lines or fitting a height link in reverse.
- Skipping calibration, ride-height measurement or wheel alignment after repair.
Arnott questions and answers
Q: What Arnott parts are represented here?
A: The range includes air springs, complete air struts, compressors, valves, shock absorbers and levelling sensors.
Q: Why is my air-suspension compressor running often?
A: A leak, valve fault, pressure loss, sensor error or electrical issue can make it cycle excessively and requires diagnosis.
Q: Can a compressor be replaced without a leak test?
A: No. An unresolved leak can overwork and damage the replacement.
Q: Are left and right air struts interchangeable?
A: Do not assume so; position, brackets, ports and paired references must agree.
Q: What is the difference between an air spring and air strut?
A: An air spring provides pneumatic springing, while a strut combines spring and damping or structural functions.
Q: Can an air line be sealed with tape?
A: Do not improvise; prepare and connect it only by the exact fitting instructions.
Q: Why does a vehicle sink while parked?
A: Bellows, line, fitting or valve leakage can be involved, and the drop pattern should be measured.
Q: Must self-levelling be disabled before lifting?
A: Yes, follow the vehicle's workshop or jacking procedure so the system cannot move unexpectedly.
Q: Can I lower the vehicle with an empty air spring?
A: Only if the exact installation procedure specifically directs and controls it; otherwise damage can result.
Q: Does a height sensor need calibration?
A: Many systems require basic settings or height calibration after relevant sensor or suspension work.
Q: Why check wheel alignment?
A: Strut or ride-height changes can alter suspension geometry, so follow the vehicle's alignment requirements.
Q: What should be recorded after fitting?
A: Keep the Arnott codes, positions, leak results, heights, calibration and compressor behaviour.