Liqui Moly 20158 DOT 5.1 Synthetic Brake Fluid ABS Disc Hydraulic Clutch 250ml

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Product Specification:

SKU:LQM20158

MPN: 20158

UPC: 4100420201592

Weight: 16.3 lb

Type: Brake Fluid

Vehicle Fitment

Universal - suitable for all passenger car and light truck disc brake, drum brake, ABS brake, and hydraulic clutch systems requiring DOT 5.1, DOT 4, or DOT 3 synthetic brake fluid, regardless of vehicle make or model
Compatible with any system where FMVSS 116 DOT 3, FMVSS 116 DOT 4, FMVSS 116 DOT 5.1, ISO 4925 Class 3, ISO 4925 Class 4, ISO 4925 Class 5.1, SAE J 1703, or SAE J 1704 specification brake fluid is required
Particularly well-suited for vehicles specifying low-viscosity brake fluid for electronically controlled braking systems (ABS, ESP, traction control)
Consult your owner's manual or brake system documentation to confirm the correct brake fluid specification for your vehicle before ordering

Fitment Notes

NOT for use in mineral oil-based central hydraulic systems - some vehicles (notably certain Citroen models using LHM fluid) require mineral oil-based hydraulic fluid; using glycol-based DOT 5.1 in a mineral oil system will cause severe seal and component damage
NOTE: DOT 5.1 is a glycol-based fluid - it is NOT the same as DOT 5, which is silicone-based and incompatible with glycol-based systems; DOT 5.1 IS compatible and miscible with DOT 3 and DOT 4 fluids
CAUTION: Brake fluid damages paint finishes on contact - avoid spilling on painted surfaces; if spillage occurs, rinse immediately and thoroughly with water
Miscible and compatible with all high-quality synthetic DOT 3, DOT 4, and DOT 5.1 brake fluids - can be used to top off existing systems; however, optimum performance is only achieved when used as the sole fill fluid
Compatible with all conventional brake fluid bleeding devices and pressure bleeding equipment
Brake fluid is hygroscopic - it absorbs moisture from the atmosphere over time, progressively lowering the wet boiling point; change brake fluid per your vehicle manufacturer's recommended service interval regardless of appearance
Sold as a single 250 ml bottle - purchase the quantity required for your brake system flush based on your vehicle's reservoir and line capacity
Made in Germany

Features

Synthetic glycol-based DOT 5.1 formulation - based on glycol ethers, alkyl polyglycols, and glycol ether esters; delivers a higher performance level than DOT 4 while remaining fully compatible and miscible with DOT 3 and DOT 4 fluids, making it a direct upgrade for any system currently using DOT 3 or DOT 4
Extremely high wet and dry boiling points - DOT 5.1 boiling points exceed both DOT 3 and DOT 4 minimum requirements, providing a significantly larger safety margin against vapor lock during extreme braking conditions such as repeated heavy stops, mountain descents, emergency braking, or performance/track driving
Outstanding protection against steam bubble formation - the combination of a high boiling point and specialized moisture scavenger additives actively suppresses vapor bubble formation even as the fluid absorbs atmospheric moisture over time, maintaining consistent pedal feel and brake response throughout the service interval
Special moisture scavengers suppress steam at increased moisture levels - DOT 5.1's glycol chemistry combines effectively with absorbed water, and the scavenger additives further limit the boiling point depression caused by moisture ingress compared to lower-specification fluids
Excellent low-temperature behavior - maintains low viscosity at cold temperatures for rapid hydraulic response in ABS and ESP electronic braking systems at cold-weather startup; low-viscosity formulation reduces ABS/ESP pump cycling effort and response latency
Excellent elastomer compatibility - fully compatible with the rubber seals, O-rings, and cup seals used in brake calipers, wheel cylinders, master cylinders, and ABS/ESP hydraulic control units, preventing seal deterioration, swelling, or leakage
Unique inhibitors prevent metallic corrosion and high-temperature oxidation - protects all metallic brake system components including calipers, wheel cylinders, master cylinders, ABS pump valves, and brake line fittings from corrosion throughout the fluid's service life
Suitable for ABS brake systems - meets the viscosity, compressibility, and material compatibility requirements of modern anti-lock braking system hydraulic control units and electronic stability control systems
Suitable for hydraulic clutch systems - compatible with hydraulic clutch master cylinders and slave cylinders where DOT 5.1, DOT 4, or DOT 3 specification fluid is specified
Manufactured exclusively in Germany to Liqui Moly's strict quality standards

Specifications

Part Number: 20158
Brand: Liqui Moly
Product Name: Brake Fluid DOT 5.1
DOT Rating: DOT 5.1
Fluid Type: Synthetic glycol-based (glycol ethers, alkyl polyglycols, glycol ether esters)
Volume: 250 ml
Container: Plastic bottle
Country of Manufacture: Germany
Compatible With: Disc brakes, drum brakes, ABS systems, hydraulic clutch systems requiring DOT 3, DOT 4, or DOT 5.1
NOT Compatible With: DOT 5 (silicone-based) systems; mineral oil-based central hydraulic systems (LHM)
UPC: 4100420201585

Approvals and OEM Specifications Met

FMVSS 116 DOT 3 / FMVSS 116 DOT 4 / FMVSS 116 DOT 5.1
ISO 4925 Class 3 / ISO 4925 Class 4 / ISO 4925 Class 5.1
SAE J 1703 / SAE J 1704

Included Components

1x 250 ml bottle of Liqui Moly Brake Fluid DOT 5.1

Product Description

Liqui Moly 20158 is the Brake Fluid DOT 5.1 in a 250 ml bottle - a fully synthetic glycol-based brake fluid delivering higher wet and dry boiling points than both DOT 3 and DOT 4, suitable for all disc brake, drum brake, ABS, and hydraulic clutch systems where DOT 5.1, DOT 4, or DOT 3 specification brake fluid is required. NOT to be confused with DOT 5 (silicone-based) - DOT 5.1 is glycol-based and fully compatible with DOT 3 and DOT 4 systems. NOT for mineral oil-based hydraulic systems. Sold as a single 250 ml bottle.

DOT 5.1 represents the highest performance level in glycol-based brake fluid chemistry, with boiling points exceeding both DOT 3 and DOT 4 minimum requirements. This provides a meaningfully larger safety margin against vapor lock during extreme braking events - making it particularly well-suited for performance vehicles, European vehicles specifying high-performance brake fluid, and any application where repeated heavy braking may cause significant brake temperature rise. The synthetic formulation meets FMVSS 116 DOT 3/4/5.1, ISO 4925 Class 3/4/5.1, and SAE J 1703/J 1704. Unique inhibitors protect metallic brake components from corrosion and oxidation at high temperatures, while special moisture scavengers suppress steam bubble formation as the fluid absorbs atmospheric moisture. Low viscosity ensures rapid hydraulic response in modern ABS and ESP electronic braking systems. Miscible with DOT 3 and DOT 4 fluids for top-off compatibility. Avoid contact with painted surfaces. Change per manufacturer's recommended service schedule. Made in Germany by Liqui Moly.