RTC5670 | Regulator and Brush Box Assembly - 200Tdi, V8 | Defender, Discovery
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: RTC5670 - Regulator and Brush Box Assembly - A127 65A Alternator
RTC5670 is a regulator and brush box assembly fitted to the A127 65A alternator. The assembly carries the carbon brushes and the integrated voltage regulator within the alternator electrical assembly for the vehicle charging circuit. The carbon brushes provide the moving electrical contact between the alternator rotor and the external charging circuit by riding on the rotor slip rings and transmitting field current to the vehicle wiring; the integrated regulator monitors system voltage and modulates the field current to maintain the alternator output at the required charging level. This assembly is a serviceable component on compatible A127 65A units used across Defender, Discovery 1 and Range Rover Classic applications - replacement addresses worn brushes or regulator faults without replacing the entire alternator. Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Defender (1987-2006) - 2.5L 4 Cyl Diesel (Naturally Aspirated)
- Defender (1987-2006) - 2.5L 4 Cyl Turbo Diesel - 200Tdi
- Defender (1987-2006) - 2.5L 4 Cyl Petrol
- Defender (1987-2006) - 3.5L V8 Twin Carb Petrol
- Discovery 1 (1989-1998) - 2.5L 200Tdi (From FA393361 to WA799999)
- Discovery 1 (1989-1998) - 3.5L V8 Twin Carb Petrol (From FA393361 to WA799999)
- Range Rover Classic (1986-1991) - 2400 Diesel VM (To HA610293)
- Range Rover Classic (1986-1991) - 2500 Diesel VM (To HA610293)
- Range Rover Classic (1986-1991) - V8 Petrol Twin Carb (To HA610293)
- Range Rover Classic (1992-1994) - 2.5L Turbo Diesel - 200Tdi (From JA610294)
- Range Rover Classic (1992-1994) - V8 Petrol EFI (From JA610294)
Frequently Asked Questions
RTC5670 is the regulator and brush box assembly for the A127 65A alternator. It carries the carbon brushes that contact the rotor slip rings to transmit field current and houses the voltage regulator that monitors system voltage and adjusts the field current to keep alternator output within the required charging range. It is a serviceable unit when brush wear or regulator fault causes charging issues.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | 2.5L 4 Cyl Diesel (Naturally Aspirated) |
| Land Rover Defender (1987-2006) | 2.5L 4 Cyl Turbo Diesel - 200Tdi |
| Land Rover Defender (1987-2006) | 2.5L 4 Cyl Petrol |
| Land Rover Defender (1987-2006) | 3.5L V8 Twin Carb Petrol |
| Land Rover Discovery 1 (1989-1998) | 2.5L 200Tdi (From FA393361 to WA799999) |
| Land Rover Discovery 1 (1989-1998) | 3.5L V8 Twin Carb Petrol (From FA393361 to WA799999) |
| Land Rover Range Rover Classic (1986-1991) | 2400 Diesel VM (To HA610293) |
| Land Rover Range Rover Classic (1986-1991) | 2500 Diesel VM (To HA610293) |
| Land Rover Range Rover Classic (1986-1991) | V8 Petrol Twin Carb (To HA610293) |
| Land Rover Range Rover Classic (1992-1994) | 2.5L Turbo Diesel - 200Tdi (From JA610294) |
| Land Rover Range Rover Classic (1992-1994) | V8 Petrol EFI (From JA610294) |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Inspect the assembly when charging faults occur or if the battery is being under- or overcharged; replace the unit if brushes are visibly worn or if the voltage regulator is faulty. A qualified technician can confirm wear and proper fitment before replacement.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
- Z8 products are normally supplied by Allmakes.
All products and accessories available on LRDirect.com come with a 2-year warranty.