RIDEX Rear Left Brake Hose – MX-5 NA/NB Standard Brakes • 83B0232

RIDEX 83B0232 Rear Left Brake Hose – MX-5 NA/NB Standard Brakes

Replacement RIDEX flexible hydraulic brake hose for the rear-left / UK nearside of Mazda MX-5 Mk1/NA, Mk2/NB and applicable Mk2.5/NB-FL models fitted with the standard braking system.

The flexible brake hose carries pressurised brake fluid between the vehicle’s rigid hydraulic pipework and the moving rear brake caliper. Its reinforced flexible construction allows normal suspension and wheel movement while maintaining hydraulic braking pressure.

Side identification: This is the rear-left hose, which is the nearside on UK right-hand-drive vehicles. RIDEX 83B0239 is the corresponding rear-right / UK offside hose.

Important fitment restriction: Mazda MX-5 Mk2.5/NB-FL vehicles fitted with the factory big-brake system require a different hose. This product should only be fitted where the vehicle retains the applicable standard rear brake arrangement.

Common reasons for replacement include cracking or perishing of the flexible outer hose, bulging under hydraulic pressure, corrosion around the end fittings, brake-fluid leakage, damaged mounting points or internal hose deterioration that can restrict fluid return and cause a brake to bind.

• Part type: Flexible hydraulic brake hose
• Installation position: Rear axle left
• UK vehicle side: Nearside / left-hand side
• Connection 1: 10.0 mm banjo
• Connection 2: Internal M10 × 1
• Published overall length: 295 / 324 mm
• Thread length: 10 mm
• Approximate weight: 0.15 kg
• Quantity supplied: 1 brake hose
• Matching rear-right RIDEX hose: 83B0239
• Brand: RIDEX
• Part No.: 83B0232

Fitment advice: This hose corresponds with Mazda references NA01-43-990, NA01-43-990A, NA75-43-990 and NA75-43-990A. It is confirmed for applicable Mazda MX-5 NA and NB models using the standard rear brake arrangement. On NB-FL vehicles, check whether the car has the factory big-brake package before ordering.

Other items to consider: Inspect the rear-right hose, front flexible hoses, rigid brake pipes, banjo bolt and sealing washers, caliper condition, bleed nipple and brake-fluid condition. Hoses of the same age may show similar deterioration.

Useful tools / consumables: Vehicle lift or trolley jack and axle stands, flare-nut spanner, socket and spanner set, drain container, fresh brake fluid of the correct specification, brake cleaner and suitable brake-bleeding equipment.

Difficulty guide: DIY Difficulty: Moderate. Replacing a hydraulic brake hose opens the braking system and requires correct installation, bleeding and leak checking before the vehicle is returned to service.

Why RIDEX? RIDEX brake hoses provide a cost-effective aftermarket replacement manufactured to application-specific connection and length requirements. Correctly functioning flexible hoses are essential for transmitting hydraulic pressure safely while allowing normal suspension movement.

What’s in the box: One RIDEX rear-left flexible brake hose. Brake fluid, banjo bolt, sealing washers, matching right-hand hose and installation tools are not included unless physically supplied with the component.

Installation notes: Support the vehicle securely and remove the relevant rear wheel. Clean the hose and rigid-pipe unions before dismantling them. Release the rigid brake-pipe connection using a suitable flare-nut spanner, then disconnect the hose from the caliper and its mounting points. Compare the replacement hose with the original before installation. Route it without twists and ensure it cannot rub against the wheel, suspension or bodywork. Use new sealing washers where required at the banjo connection and tighten all fittings to the applicable specifications. Refill and bleed the hydraulic circuit thoroughly, confirm a firm brake pedal and inspect every disturbed connection for leakage before driving.