do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Alternator Pulley / Pulley Nuts
By OE Match
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 1965-1973
Porsche 914 1970-1973
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90160342702
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 914 (1970-1976)
OE Match tensioning cap for selected Porsche 911, 912 and 914 Motorola alternator applications. Supplied diagram information also identifies use on specified 911 Turbo assemblies.
Fits
- Porsche 911 1965-81
- Porsche 912 1965-70
- Porsche 914-6 1969-73
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no: 11
What This Product Does
This is the tensioning cap used within the specified alternator or generator pulley assembly. It is a separate mechanical component, rather than a complete alternator, voltage regulator or belt.
Technical Details
- Part reference: 90160342803.
- Brand: OE Match.
- Motorola generator identification appears in the supplied 911 1965–69, 911 1970–73 and 914-6 diagrams.
- CAL exclusions apply to the specified 1974–77 and Turbo 1975–77 diagram applications.
Symptoms of Fault
Loose pulley hardware, belt squeal, vibration or visible pulley wobble warrant inspection of the pulley assembly. These symptoms do not establish that the tensioning cap itself is faulty; belt condition, alignment and adjoining components also need checking.
Why Replacement Matters
Renewing damaged or worn pulley hardware can form part of an alternator repair or classic Porsche restoration. Match the cap to the installed generator and inspect the surrounding assembly rather than selecting it by vehicle model alone.
FAQs
- Will this fit every alternator on the listed vehicles?
No universal compatibility is stated. Confirm the generator identification, part reference and applicable diagram notes. - Does a charging fault mean this cap needs replacing?
No. Charging problems require diagnosis; inspect the belt drive, battery, wiring and earth connections before choosing replacement parts. - What should be checked during pulley work?
Inspect belt condition, pulley alignment, retaining hardware and alternator bearing condition.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90160342803
The product you are viewing cross references to these numbers
OEMatch Alternator Pulley / Pulley Nuts — Fit, Function, Confidence
OEMatch alternator pulleys and pulley nuts for Porsche models support the alternator drive by transferring torque from the engine belt to the alternator shaft. Correctly matched pulleys and secure nuts reduce belt slip, damp vibration and help maintain stable charging and accessory power under varied driving conditions.
Available Types
- One-way decoupler pulley
- Fixed solid pulley
- Pulley nut with locking washer
Understanding OEMatch Alternator Pulley / Pulley Nuts
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original alternator pulleys and pulley nuts. OE (Original Equipment) refers to parts matching original specifications for the alternator pulleys and pulley nuts and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM alternator pulleys and pulley nuts engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
These components sit on the alternator shaft and interface with the serpentine or accessory belt, using bearings or decoupler mechanisms to maintain smooth rotation. Common symptoms of wear include belt squeal, visible wobble, reduced charging output and illumination of the battery or charging warning lights. OEMatch catalogs over 4,000 individual part numbers and over 8,700 OE cross-references and continues developing new lines to keep Porsche vehicles on the road.
Benefits Include
- Consistent charging and electrical reliability
- Reduced belt wear, noise and vibration
- Improved rotational balance and component life
Why Alternator Pulley / Pulley Nuts Wear and Fail
- Bearing fatigue or internal corrosion leading to rough rotation
- Seizure or failure of one-way decoupler mechanisms
- Belt misalignment or over-tensioning accelerating wear
- Contamination from oil, dirt or road debris affecting balance
The Importance of Replacing with OEMatch Alternator Pulley / Pulley Nuts
Replacing worn pulleys and pulley nuts avoids belt failure and potential alternator damage, restoring stable charging and preventing accessory faults. Timely renewal during belt or alternator service preserves drive alignment and reduces the risk of secondary failures. OEMatch parts are drawn from original specifications where applicable and are offered to support correct fitment on Porsche models.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances
- Fits original mounting points and clearances for straightforward installation
- Compatible with factory systems and sensors where applicable
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If the vehicle includes hidden sensors or you are unsure of the procedure, seek professional help and verify correct alignment and fixing points during installation.
