Part RM30912 is a direct replacement headlight voltage regulator rectifier for the Ski-Doo Legend and MX Z in 380, 500 and 550, and for the Lynx Enduro and Safari 400, covering model years 2002 to 2005. It is a plug-and-play, direct fit component: a single plug with four pins and four wires, fixation holes 65 mm centre to centre, and no assembly required.
Please note that some of these models use two separate regulators - one for the headlight circuit and one for charging. RM30912 replaces the headlight regulator only. If the fault you are chasing is on the charging side rather than the lighting side, RMSTATOR list part RM30914 as the charging regulator for these machines. Identifying which of the two units has failed before ordering saves fitting the right part in the wrong place.
The regulator holds the output from the lighting coils at a controlled level so the headlight and the rest of the lighting circuit are not exposed to a voltage that rises with engine speed. When it fails, the usual symptoms are bulbs that blow repeatedly at higher revs, or a headlight that stays dim and does not brighten as the engine picks up. The replacement is built with higher grade electrical components, the quality is stated to exceed OEM specifications, and all products shipped are tested.
Key Features
- Direct replacement headlight voltage regulator rectifier
- Plug-and-play, direct fit design
- No assembly required
- Quality exceeding OEM specifications
- Higher grade electrical components
- Single plug with four pins and four wires
- Fixation hole spacing of 65 mm
- Replaces the headlight regulator - see RM30914 for the charging regulator
- All products shipped are tested
Technical Specs
| Specification |
Detail |
| Part number |
RM30912 |
| Type |
Headlight voltage regulator |
| Width |
81 mm |
| Length |
55 mm |
| Height |
22 mm |
| Fixation hole centre to centre |
65 mm |
| Number of plugs |
1 |
| Number of pins |
4 |
| Number of wires |
4 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
Less than 15 V |
| Operation temperature |
-20 C to 85 C |
Vehicle Fitment Guide
| Make & Model |
Years |
| Ski-Doo Legend 380 / 500 / 550 |
2002 - 2005 |
| Ski-Doo MX Z 380 / 500 / 550 |
2002 - 2005 |
| Lynx Enduro 400 |
2002 - 2005 |
| Lynx Safari 400 |
2002 - 2005 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 515175655 |
Ski-Doo / BRP |
| 420888617 |
Ski-Doo / BRP |
Frequently Asked Questions
Does this need any modification to fit?
No. RM30912 is a plug-and-play, direct fit replacement with no assembly required. It uses a single plug with four pins and four wires and the fixation holes are 65 mm centre to centre, matching the original mounting.
Is this the charging regulator or the headlight regulator?
This is the headlight regulator. Some of these models are fitted with two separate regulators, one for the headlight circuit and one for charging. RM30912 replaces the headlight regulator only - RMSTATOR list part RM30914 for the charging regulator on these machines.
How do I tell whether the old regulator has failed?
Unregulated lighting output usually shows itself as headlight and tail light bulbs that blow repeatedly, particularly at higher engine speeds. A regulator that has failed the other way leaves the lights dim and unresponsive to revs. Checking the voltage on the lighting circuit against the 14.5 V +/- 0.5 V figure with the engine running will confirm which fault you have.
How do I confirm the part number?
RM30912 cross references to Ski-Doo numbers 515175655 and 420888617. Compare the number on the unit you are removing with those, and check the 81 x 55 x 22 mm body size and 65 mm hole spacing before ordering.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
