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RTC5928 - Alternator Regulator

- €56,40
€56,40
€56,40 - €56,40
€56,40
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Alternator Regulator for the Lucas A133 alternator. The regulator controls the alternator field current to hold the charging output at a stable voltage, protecting the battery and electrical system from over- and under-charging.

Part of the vehicle charging system, fitted to V8 EFI petrol applications.
Vehicle Model Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DISCOVERY 1 1989-1998 — Lucas A133 alternator, V8 EFI Petrol.
RANGE ROVER CLASSIC 1986-1991 — V8 EFI Petrol (80A alternator); all variants.
RANGE ROVER CLASSIC 1992-1994 — V8 EFI Petrol (Lucas A133); also 2.5L Turbo Diesel VM.
Alternative Codes
RTC5928

In stock 1 unit
1 · Gouda 0 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the RTC5928 alternator regulator do?
The RTC5928 regulator controls the field current on the Lucas A133 alternator, holding the charging output at a stable voltage. It protects the battery and electrical system from over and under charging. It's the genuine Land Rover regulator for the A133 unit.
Which models use this alternator regulator?
This regulator fits the Lucas A133 alternator on the Discovery 1 (1989-1998) and Range Rover Classic V8 EFI petrol (1986-1994). On 1992-1994 Range Rover Classics it also covers the 2.5 turbo diesel VM. The 1986-1991 cars used the 80A alternator.
How do I confirm this regulator fits my alternator?
Confirm your alternator is the Lucas A133 before ordering, since this regulator is specific to that unit. It's listed mainly for V8 EFI petrol Range Rover Classic and Discovery 1, plus the 1992-1994 VM turbo diesel. Check the alternator markings if unsure.