TOPRAN 638 951 Brake Pad Wear Indicator

Compatible with AUDI Q7 (4MB, 4MG, 4MQ) , AUDI A4 B9 (8W2, 8WC) , AUDI A4 B9 Avant (8W5, 8WD) Show more info
Ensures timely replacement of brake pads for optimal safety. This indicator alerts you when your brake pads are worn.
2.54 EUR
inc. VAT 21%
In stock 96
Delivery 1 day (15.05.2026)
PN 638 951
Make TOPRAN

The TOPRAN 638 951 Brake Pad Wear Indicator is a crucial safety component designed to inform you when your brake pads have reached their wear limit. This indicator works by making contact with the brake disc once the pad material has worn down sufficiently. This contact generates an audible warning sound, typically a squealing or grinding noise, alerting the driver to the need for immediate brake pad replacement. Regularly checking and replacing brake pads is essential for maintaining effective braking performance and preventing damage to other braking system components, such as the brake discs. The TOPRAN wear indicator provides a reliable and straightforward method for monitoring pad wear. Ensure your vehicle's braking system remains in optimal condition with this high-quality wear indicator. It is designed for durability and accurate performance, contributing to your vehicle's overall safety.

  • Monitors brake pad wear level.
  • Provides an audible warning when pads need replacement.
  • Helps maintain optimal braking performance.
  • Prevents potential damage to brake discs.
  • Ensures vehicle safety.
  • Durable construction for reliable operation.
  • Direct fit for specific vehicle applications.
  • Easy to install.
Installation side
Front axle
Length [mm]
405
Wear sensor
Replace the warning contact together with the brake pads
Brake type
Disc brake mechanism
  • AUDI
    • Q7 (4MB, 4MG, 4MQ)
      • 3.0 TFSI quattro (245kW/333PS)
      • 3.0 TDI quattro (200kW/272PS)
      • 3.0 TDI quattro (183kW/249PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 2.0 TFSI quattro (185kW/252PS)
      • 3.0 TDI quattro (155kW/211PS)
      • 3.0 TDI e-tron quattro (275kW/374PS)
      • 3.0 TDI quattro (190kW/258PS)
      • SQ7 TDI quattro (320kW/435PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 45 TDI Mild Hybrid quattro (170kW/231PS)
      • 55 TFSI Mild Hybrid quattro (250kW/340PS)
      • 55 TFSI e quattro (280kW/381PS)
      • 60 TFSI e quattro (335kW/455PS)
      • SQ7 quattro (373kW/507PS)
      • 45 TDI quattro (183kW/249PS)
      • 45 TFSI quattro (195kW/265PS)
    • A4 B9 (8W2, 8WC)
      • 1.4 TFSI (110kW/150PS)
      • 2.0 TFSI (140kW/190PS)
      • 2.0 TFSI (185kW/252PS)
      • 2.0 TFSI quattro (185kW/252PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 2.0 TDI (110kW/150PS)
      • 3.0 TDI (160kW/218PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 3.0 TDI quattro (200kW/272PS)
      • 2.0 TDI (100kW/136PS)
      • 2.0 TFSI (183kW/249PS)
      • 2.0 TFSI quattro (183kW/249PS)
      • 2.0 TDI (90kW/122PS)
      • S4 TFSi quattro (260kW/354PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI quattro (120kW/163PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
      • 2.0 TFSI Mild Hybrid quattro (185kW/252PS) DDWA
      • 35 TFSI Mild Hybrid (110kW/150PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 50 TDI quattro (210kW/286PS)
      • 45 TDI quattro (170kW/231PS)
      • S4 TDI Mild Hybrid quattro (255kW/347PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 40 TFSI Mild Hybrid (150kW/204PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • S4 TDI Mild Hybrid quattro (251kW/341PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
    • A4 B9 Avant (8W5, 8WD)
      • 2.0 TFSI (140kW/190PS)
      • 2.0 TFSI quattro (185kW/252PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 2.0 TDI (110kW/150PS)
      • 3.0 TDI (160kW/218PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 3.0 TDI quattro (200kW/272PS)
      • 2.0 TFSI quattro (183kW/249PS)
      • 2.0 TDI (100kW/136PS)
      • 1.4 TFSI (110kW/150PS)
      • 2.0 TDI (90kW/122PS)
      • 2.0 TFSI (185kW/252PS)
      • 2.0 TFSI (183kW/249PS)
      • S4 quattro (260kW/354PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI quattro (120kW/163PS)
      • 2.0 TFSI g-tron (125kW/170PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
      • 2.0 TFSI Mild Hybrid quattro (185kW/252PS)
      • 35 TFSI Mild Hybrid (110kW/150PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 50 TDI quattro (210kW/286PS)
      • 45 TDI quattro (170kW/231PS)
      • 40 TFSI g-tron (125kW/170PS)
      • S4 TDI Mild Hybrid quattro (255kW/347PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
      • 40 TFSI Mild Hybrid (150kW/204PS)
      • S4 TDI Mild Hybrid quattro (251kW/341PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
    • A5 (F53, F5P)
      • 2.0 TFSI quattro (185kW/252PS)
      • S5 quattro (260kW/354PS)
      • 2.0 TDI (140kW/190PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 2.0 TFSI (185kW/252PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 2.0 TFSI (140kW/190PS)
      • 3.0 TDI (160kW/218PS)
      • 2.0 TFSI quattro (183kW/249PS)
      • 1.4 TFSI (110kW/150PS)
      • 3.0 TDI quattro (200kW/272PS)
      • 3.0 TDI quattro (210kW/286PS)
      • 2.0 TDI (110kW/150PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
      • 2.0 TFSI Mild Hybrid quattro (185kW/252PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 35 TFSI Mild Hybrid (110kW/150PS)
      • 45 TDI quattro (170kW/231PS)
      • S5 TDI Mild Hybrid quattro (255kW/347PS)
      • 35 TDI (120kW/163PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • S5 TDI Mild Hybrid quattro (251kW/341PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
    • A5 Sportback (F5A, F5F)
      • 2.0 TFSI (185kW/252PS)
      • 2.0 TFSI quattro (185kW/252PS)
      • S5 quattro (260kW/354PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 2.0 TFSI quattro (183kW/249PS)
      • 1.4 TFSI (110kW/150PS)
      • 3.0 TDI quattro (200kW/272PS)
      • 3.0 TDI (160kW/218PS)
      • 2.0 TFSI (140kW/190PS)
      • 2.0 TFSI g-tron (125kW/170PS)
      • 3.0 TDI quattro (210kW/286PS)
      • 2.0 TDI (110kW/150PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
      • 2.0 TFSI Mild Hybrid (185kW/252PS)
      • 2.0 TFSI Mild Hybrid quattro (185kW/252PS)
      • 35 TFSI Mild Hybrid (110kW/150PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 45 TDI quattro (170kW/231PS)
      • 40 TFSI g-tron (125kW/170PS)
      • S5 TDI Mild Hybrid quattro (255kW/347PS)
      • 35 TDI (120kW/163PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • S5 TDI Mild Hybrid quattro (251kW/341PS)
    • Q5 (FYB, FYG)
      • 2.0 TDI quattro (120kW/163PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 2.0 TFSI quattro (183kW/249PS)
      • 2.0 TFSI quattro (185kW/252PS)
      • 2.0 TDI (110kW/150PS)
      • SQ5 TFSI quattro (260kW/354PS)
      • 2.0 TDI (100kW/136PS)
      • 3.0 TDI quattro (210kW/286PS)
      • 35 TDI quattro (120kW/163PS)
      • 40 TDI quattro (140kW/190PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 45 TDI quattro (170kW/231PS)
      • SQ5 TDI Mild Hybrid quattro (255kW/347PS)
      • 50 TDI quattro (210kW/286PS)
      • 55 TFSI e quattro (270kW/367PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 50 TFSI e quattro (220kW/299PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • SQ5 TDI Mild Hybrid quattro (251kW/341PS)
      • 50 TFSI e quattro (220kW/299PS)
      • 35 TDI (120kW/163PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
      • 55 TFSi e quattro (270kW/367PS)
    • A5 Kabriolets (F57, F5E)
      • 2.0 TFSI quattro (185kW/252PS)
      • S5 quattro (260kW/354PS)
      • 2.0 TDI (140kW/190PS)
      • 3.0 TDI quattro (160kW/218PS)
      • 2.0 TFSI (185kW/252PS)
      • 2.0 TFSI (140kW/190PS)
      • 3.0 TDI (160kW/218PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 3.0 TDI quattro (210kW/286PS)
      • 2.0 TDI (110kW/150PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
      • 2.0 TFSI Mild Hybrid quattro (185kW/252PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 40 TDI quattro (140kW/190PS)
      • 50 TDI quattro (210kW/286PS)
      • 35 TDI (120kW/163PS)
      • 40 TFSI Mild Hybrid (150kW/204PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
      • 35 TFSI Mild Hybrid (110kW/150PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 30 TDI MILD HYBRID (100kW/136PS)
      • 40 TDI Mild Hybrid (150kW/204PS)
    • A8 D5 (4N2, 4N8, 4NC, 4NL)
      • 55 TFSI Mild Hybrid quattro (250kW/340PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 60 TFSI Mild Hybrid quattro (338kW/460PS)
      • 50 TFSI Mild Hybrid quattro (4N8) (210kW/286PS)
      • 45 TDI quattro (183kW/249PS)
      • 60 TFSI e quattro (330kW/449PS)
      • S8 Mild Hybrid quattro (420kW/571PS)
      • 60 TDI Mild Hybrid quattro (320kW/435PS)
      • 60 TFSI e quattro (340kW/462PS)
    • A7 Sportback (4KA)
      • 55 TFSI Mild Hybrid quattro (250kW/340PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 45 TDI Mild Hybrid quattro (170kW/231PS)
      • 40 TDI Mild Hybrid (150kW/204PS)
      • 45 TDI Mild Hybrid quattro (155kW/211PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 45 TFSI Mild hybrid quattro (180kW/245PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • S7 TDI Mild Hybrid quattro (257kW/349PS)
      • 45 TFSI Mild Hybrid (195kW/265PS)
      • 55 TFSI e quattro (270kW/367PS)
      • 45 TDI Mild Hybrid quattro (180kW/245PS)
      • S7 TDI Mild Hybrid quattro (253kW/344PS)
      • 50 TFSI e quattro (220kW/299PS)
      • 40 TFSI Mild Hybrid (140kW/190PS)
    • Q8 (4MN, 4MT)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 45 TDI Mild Hybrid quattro (170kW/231PS)
      • SQ8 TDI Mild Hybrid quattro (320kW/435PS)
      • 55 TFSI Mild Hybrid quattro (250kW/340PS)
      • SQ8 quattro (373kW/507PS)
      • 55 TFSI e quattro (280kW/381PS)
      • 60 TFSI e quattro (340kW/462PS)
    • A6 C8 (4A2)
      • 45 TDI Mild Hybrid quattro (170kW/231PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 55 TFSi Mild Hybrid quattro (250kW/340PS)
      • 40 TDI Mild Hybrid (150kW/204PS)
      • 45 TDI Mild Hybrid quattro (155kW/211PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • S6 TDI Mild Hybrid quattro (257kW/349PS)
      • 50 TFSI e quattro (220kW/299PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 45 TFSI Mild Hybrid (195kW/265PS)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 45 TDI Mild Hybrid quattro (180kW/245PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 50 TFSI e quattro (220kW/299PS)
      • S6 TDI Mild Hybrid quattro (253kW/344PS)
      • 45 TDI quattro (183kW/249PS)
      • 40 TDI (140kW/190PS)
    • A6 C8 Avant (4A5)
      • 45 TDI Mild Hybrid quattro (170kW/231PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 55 TFSI Mild Hybrid quattro (250kW/340PS)
      • 40 TDI Mild Hybrid (150kW/204PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 45 TDI Mild Hybrid quattro (155kW/211PS)
      • 45 TFSI Mild Hybrid quattro (180kW/245PS)
      • 45 TFSI Mild Hybrid (180kW/245PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • S6 TDI Mild Hybrid quattro (257kW/349PS)
      • 30 TDI Mild Hybrid (100kW/136PS)
      • 55 TFSI e quattro (270kW/367PS)
      • 45 TFSI Mild Hybrid (195kW/265PS)
      • 45 TDI Mild Hybrid quattro (180kW/245PS)
      • S6 TDI Mild Hybrid quattro (253kW/344PS)
      • 50 TFSi e quattro (220kW/299PS)
      • 45 TDI quattro (183kW/249PS)
    • Q5 Sportback (FYT)
      • 45 TFSI Mild Hybrid quattro (195kW/265PS)
      • 40 TDI Mild Hybrid quattro (150kW/204PS)
      • 50 TDI Mild Hybrid quattro (210kW/286PS)
      • 35 TDI Mild Hybrid (120kW/163PS)
      • SQ5 TDI Mild Hybrid quattro (251kW/341PS)
      • 50 TFSI e quattro (220kW/299PS)
      • 55 TFSI e quattro (270kW/367PS)
      • 40 TFSI Mild Hybrid quattro (150kW/204PS)
  • VW
    • TOUAREG (CR7, RC8)
      • 3.0 TDI 4motion (210kW/286PS)
      • 3.0 TDI 4motion (170kW/231PS)
      • 3.0 TDI 4motion (183kW/249PS)
      • 3.0 TSI 4motion (250kW/340PS)
      • 2.0 TFSi 4motion (183kW/249PS)
      • 4.0 V8 TDI 4motion (310kW/421PS)
      • 3.0 eHybrid 4motion (280kW/381PS)
      • 3.0 R 4motion (340kW/462PS)
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