Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
Brake System
GENERAL SPECIFICATIONS
| Application | Specification - Unit: mm (in) | |||
|---|---|---|---|---|
| Model | QG18DE | QR25DE | ||
| Front brake | Brake model | CL25VA | CL25VB | OPB27VA |
| Cylinder bore diameter | 57.2 (2.252) | 38 (1.50) x 2 + 44 (1.73) x 2 | ||
| Pad length x width x thickness | 125.6 x 46.0 x 11.0 (4.94 x 1.811 x 0.433) | 117.1 x 53.3 x 9.3 (4.61 x 2.098 x 0.366) | ||
| Rotor outer diameter x thickness | 257 x 22 (10.12 x 0.87) | 280 x 22 (11.02 x 0.87) | 305 x 22 (12.01 x 0.87) | |
| Rear brake | Brake model | LT20G | CL9HC | |
| Cylinder bore diameter/caliper bore diameter | 15.87 (5/8) type a 17.45 (11/16) type b | 33.96 (1 11/32) | ||
| Lining length x width x thickness | 219.4 x 35 x 4.5 (8.64 x 1.38 x 0.177) | 89.1 x 39.5 x 10 (3.508 x 1.555 x 0.39) | ||
| Drum inner diameter/Disc diameter x thickness | 203.2 (8) | 232 x 7 (9.13 x 0.28) | 232 x 7 (9.13 x 0.28) or 278 x 9 (10.94 x 0.35)* | |
| Master cylinder | Cylinder bore diameter | 23.81 (15/16) | ||
| Control valve | Valve model | Dual proportioning valve | ||
| Split point [kPa (kg/cm2 , psi)] x reducing ratio | 1,961 (20,284) x 0.2 | 2,942 (30,427) x 0.2 | ||
| Brake booster | Booster model | M215T | ||
| Diaphragm diameter | Primary: 230 (9.06) Secondary: 205 (8.07) |
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| Brake fluid | Recommended brake fluid | Refer to "RECOMMENDED FLUIDS AND LUBRICANTS ". | ||
| *: With Spec V brake package. | ||||
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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