Incazelo
Vehicle Fitment & Part Details
This rear brake caliper repair kit (SKU MAP-101046) services ATE-manufactured rear brake calipers with a 42 mm piston diameter, fitted as OE across a wide range of BMW, Mercedes-Benz, and Volvo passenger vehicles from the late 1990s through current production. The kit contains the rubber seals, dust boots, and small hardware needed to rebuild an existing caliper. The critical identifier is the caliper brand (ATE) and piston diameter (42 mm) - not the vehicle alone - because several of these platforms were supplied with either ATE or alternative brake systems (TRW, Lucas, Brembo) depending on production run. Always confirm your caliper is ATE and measure the piston diameter before ordering.
Key Details
- SKU
- MAP-101046
- Component
- Brake Caliper Repair Kit (seal kit)
- Position
- Rear
- Piston Diameter
- 42 mm
- Brake System
- ATE (caliper must be ATE-branded)
- Lead OE
- BMW 34 21 6 765 212 / Mercedes-Benz A 000 421 99 86
Key Benefits
- Services the ATE 42 mm rear caliper fitted as OE to BMW 1, 3, 5, 6, X1, X3, X5, Mercedes-Benz CLS, E-Class, GL, GLK, M-Class, R-Class, S-Class, SL, and Volvo S60/S70/S80/V70/XC70 across production years 1997-present.
- Repair kit approach is significantly cheaper than caliper replacement when the caliper body and piston are undamaged - only the rubber seals need replacing.
- Cross-referenced to 3 BMW OE numbers and 2 Mercedes-Benz OE numbers covering the full production run.
What's Included
- Piston seal (square-section hydraulic seal that fits in the caliper bore)
- Dust boot (flexible outer boot that seals the piston-to-caliper gap against dirt and water)
- Bleeder screw dust cap
- Supporting small-parts seals and O-rings as per kit specification
What's NOT Included
- Caliper piston - if your piston is corroded, scored, or seized, order a piston separately or replace the complete caliper
- Caliper body - if the caliper bore is corroded, pitted, or damaged, a repair kit will not seal reliably - replace the complete caliper
- Brake pads, brake rotors/discs, caliper bracket hardware - these are not part of a seal kit
- Brake fluid - you will need DOT 4 or DOT 4 LV brake fluid (BMW and Mercedes-Benz specify DOT 4 LV for most applications)
OEM Reference Numbers
- BMW: 34 21 6 765 212, 34 21 1 164 186, 34 21 6 750 163
- Mercedes-Benz: A 000 421 99 86, 000 421 99 86
Note: Mercedes-Benz uses both the full part number with "A" prefix (A 000 421 99 86) and the numeric-only form (000 421 99 86) across their catalogue - these refer to the same part.
Product Specifications
| Specification | Value |
|---|---|
| Kit Type | Brake Caliper Seal Repair Kit (rear) |
| Piston Diameter | 42 mm |
| Brake System Brand | ATE (Alfred Teves / Continental) |
| Axle | Rear |
| Coverage | Services one caliper per kit (order 2 kits for both rear calipers) |
Vehicle Fitment - Platform Summary
This kit covers ATE 42 mm rear calipers across approximately 500+ individual engine variants on the platforms listed below. Rather than listing every engine code separately, fitment is grouped by vehicle platform - if your vehicle appears in this table AND your caliper is an ATE 42 mm unit, this kit fits.
View Full Platform Coverage (40 platforms)
| Make | Model / Platform | Chassis | Years | Coverage |
|---|---|---|---|---|
| BMW | 1 Series Hatch | E81 | 09/2006-12/2011 | All 116i, 118i, 118d, 120i, 120d, 123d, 130i variants |
| BMW | 1 Series Hatch | E87 | 06/2004-06/2011 | All 116i, 118i, 118d, 120i, 120d, 123d, 130i variants |
| BMW | 1 Series Coupe | E82 | 10/2007-10/2013 | All 118d, 120i, 120d, 123d, 125i variants |
| BMW | 1 Series Convertible | E88 | 12/2007-12/2013 | All 118i, 118d, 120i, 120d, 123d, 125i variants |
| BMW | 3 Series Sedan / Coupe / Touring / Convertible | E46 | 10/1999-08/2006 | 325i, 330i, 330Ci, 330d, 330Cd, M3 (petrol 2.5/3.0/3.2 + diesel 3.0) |
| BMW | 3 Series Sedan | E90 | 12/2004-12/2011 | All 316i, 316d, 318i, 318d, 320i, 320d, 320si, 323i, 325i, 325xi, 328i, 330i, 330xi (petrol + diesel) |
| BMW | 3 Series Touring | E91 | 12/2004-06/2012 | All 316i, 316d, 318i, 318d, 320i, 320d, 323i, 325i, 325xi (petrol + diesel) |
| BMW | 3 Series Coupe | E92 | 06/2006-12/2013 | All 316i, 318i, 320i, 320d, 323i, 325i, 325xi (petrol + diesel) |
| BMW | 3 Series Convertible | E93 | 09/2006-12/2013 | All 318i, 320i, 320d, 323i, 325i (petrol + diesel) |
| BMW | 5 Series / Touring | E39 | 10/1998-06/2004 | 520i, 523i, 525i, 528i, 530i, 540i, M5; 520d, 525d, 525tds, 530d |
| BMW | 5 Series Sedan | E60 | 07/2003-03/2010 | All 520i, 523i, 525i, 528i, 530i, 530xi; 520d, 525d, 525xd, 530d, 530xd (petrol + diesel) |
| BMW | 5 Series Touring | E61 | 03/2004-12/2010 | All 520i, 523i, 525i, 525xi, 530i, 530xi; 520d, 525d, 525xd, 530d, 530xd (petrol + diesel) |
| BMW | 5 Series Sedan (current) | G60 / G90 / G68 | 07/2023- | 520i, 520d, 523d (Mild-Hybrid) and 530e Plug-in Hybrid variants |
| BMW | 5 Series Touring (current) | G61 / G99 | 03/2024- | 520i MHEV, 520d, 520d xDrive, 530e Plug-in Hybrid variants |
| BMW | 6 Series Coupe / Convertible | E63 / E64 | 09/2004-08/2010 | 630i 3.0 V6 petrol variants |
| BMW | X1 | E84 | 10/2009-06/2015 | All sDrive 16i/16d/18i/18d/20i/20d, xDrive 18d/20i/20d/23d/25i/25d/28i |
| BMW | X3 | E83 | 01/2004-12/2011 | 2.0i, 2.0d, 2.0sd, 2.5i, 2.5si, 3.0i, 3.0si, 3.0d, 3.0sd, xDrive 18d/20d/25i/30d/30i/35d |
| BMW | X3 (current) | G45 | 08/2024- | 1.6 sDrive 20, xDrive 20, xDrive 20d, xDrive 30e variants |
| BMW | X5 | E53 | 01/2000-10/2006 | 3.0i, 4.4i, 4.6is, 4.8is petrol; 3.0d diesel |
| Mercedes-Benz | CLS | C219 | 10/2004-12/2010 | CLS 280, 300, 320 CDI, 350, 350 CDI, 500 petrol/diesel variants |
| Mercedes-Benz | CLS | C218 | 01/2011-12/2017 | CLS 220d, 250d, 350, 350 CDI, 400, 500 petrol/diesel/4-matic variants |
| Mercedes-Benz | CLS Shooting Brake | X218 | 10/2012-12/2017 | CLS 220d, 250d, 350, 350 CDI, 400, 500 estate variants |
| Mercedes-Benz | E-Class Sedan | W211 | 03/2002-12/2008 | E 200 CDI through E 500, E 220 CDI, E 270 CDI, E 280 CDI, E 320 CDI, E 350, E 500 variants |
| Mercedes-Benz | E-Class Estate | S211 | 03/2003-07/2009 | E 200 through E 500 T, petrol and diesel estate variants |
| Mercedes-Benz | E-Class Platform/Chassis | VF211 | 03/2003-07/2009 | E 270 CDI, E 280 CDI (long-wheelbase / special body builds) |
| Mercedes-Benz | E-Class Sedan | W212 | 01/2009-12/2016 | E 180, E 200 through E 500, E 220d / CDI, E 250d, E 300 BlueTEC, E 350 CDI, E 400, E 500, hybrid variants |
| Mercedes-Benz | E-Class Estate | S212 | 08/2009-12/2016 | E 200 through E 500, E 220d / CDI, E 250d, E 350 CDI, E 400, E 500, hybrid estate variants |
| Mercedes-Benz | GL-Class | X164 | 09/2006-12/2012 | GL 320 CDI, 350 CDI, 420 CDI, 450 CDI, 450, 500 4-matic variants |
| Mercedes-Benz | GLK-Class | X204 | 06/2008-12/2015 | GLK 200, 220 CDI, 250, 250 CDI, 280, 300, 320 CDI, 350, 350 CDI (all petrol + diesel variants) |
| Mercedes-Benz | M-Class | W164 | 07/2005-12/2011 | ML 300 CDI, 320 CDI, 420 CDI, 450 CDI, 500 4-matic variants |
| Mercedes-Benz | R-Class | W251 / V251 | 01/2006-12/2014 | R 280 CDI, 300 CDI, 320 CDI, 350 CDI, R 280, 300, 350, 500 4-matic variants |
| Mercedes-Benz | S-Class Sedan | W220 / V220 | 10/1998-08/2005 | S 280, 320 CDI, 350, 400 CDI, 430, 500 (short and long wheelbase) |
| Mercedes-Benz | S-Class Sedan | W221 / V221 | 10/2005-12/2013 | S 250 CDI, 280, 300, 320 CDI, 350, 350 CDI, 350 BlueTEC, 400 Hybrid, 420 CDI, 450, 500, 600 variants |
| Mercedes-Benz | CL-Class Coupe | C215 | 03/1999-03/2006 | CL 500 petrol variant |
| Mercedes-Benz | CL-Class Coupe | C216 | 06/2006-12/2013 | CL 500 and 500 4-matic petrol variants |
| Mercedes-Benz | SL Roadster | R230 | 03/2003-01/2012 | SL 280, 300, 350, 500 petrol variants |
| Volvo | S60 I | 384 | 07/2000-04/2010 | 2.0T, 2.4, 2.4T, 2.5T, T5, R 2.5T, D5, 2.4D petrol + diesel variants |
| Volvo | S70 | 874 | 01/1997-11/2000 | 2.0 petrol variant |
| Volvo | S80 I | 184 | 06/1998-07/2006 | 2.0, 2.0T, 2.4, 2.4T, 2.5T, 2.9, 3.0, T5, T6, D5, 2.4D, 2.5 TDI variants |
| Volvo | V70 II | 285 | 11/1999-12/2008 | 2.0T, 2.3, 2.4, 2.4T, 2.5T, T5, D5, 2.4D, 2.5 TDI estate variants |
| Volvo | XC70 I Cross Country | 295 | 09/2002-08/2007 | 2.5T XC AWD, D5 XC AWD, D5 AWD variants |
Fitment Notes
- Caliper brand verification is essential before ordering. This kit fits ONLY ATE-branded calipers. Several vehicles in this fitment list were supplied with either ATE, TRW/Lucas, or Brembo rear calipers depending on production run, factory trim level, and region. A TRW or Brembo caliper needs a different repair kit.
- Identify your caliper: look for "ATE" stamped or cast on the caliper body, typically on the outboard face visible through the wheel spokes. ATE calipers often have their logo (stylised "ATE" text) cast into the housing.
- Measure your piston diameter with a vernier caliper if in doubt. This kit fits 42 mm pistons only. A 38 mm or 44 mm piston needs a different kit.
- One kit services one caliper. Order 2 kits to rebuild both rear calipers - best practice when one caliper is showing seal failure.
- CNG, LPG, and Flexifuel variants have been excluded from the fitment summary as they are not common in the South African market. The rear caliper hardware on those variants is typically identical to the standard petrol/diesel sibling.
Using a repair kit designed for the wrong caliper brand will result in immediate brake failure. This kit is designed specifically for ATE calipers with a 42 mm piston. Before ordering:
- Identify the caliper brand by inspecting your existing rear caliper. ATE calipers are typically marked "ATE" in the casting. Other brands on these platforms include TRW (or Lucas-TRW) and Brembo, which use differently sized seals and DIFFERENT repair kits.
- Measure the piston diameter with a vernier caliper. This kit is for 42 mm pistons only. Other common rear caliper piston sizes on BMW / Mercedes / Volvo include 38 mm, 40 mm, and 44 mm.
- Check both sides. Occasionally a vehicle has been fitted with mismatched calipers after a previous repair - verify both left and right rear calipers are ATE 42 mm before ordering two kits.
- If in doubt, don't order. A wrong-brand or wrong-size repair kit will leak under brake pressure and can cause brake failure. Contact us with a photograph of your caliper for assistance before ordering.
- Brake work is safety-critical. If you are not experienced with hydraulic brake repair, have this work done by a qualified workshop. Incorrect installation can cause brake failure.
- Repair kits are suitable only when the caliper body, bore, and piston are in good condition. If the caliper bore is corroded, pitted, or scored, or if the piston shows rust, scoring, or seizure, REPLACE THE COMPLETE CALIPER rather than fitting a seal kit - a seal kit cannot compensate for a damaged caliper body.
- Thoroughly clean the caliper bore and piston before reassembly. Use brake-specific cleaner only - do not use petroleum-based solvents which will damage rubber seals.
- Lubricate new seals only with the supplied seal grease or a brake-system-approved silicone grease (e.g., ATE-branded caliper grease). Do not use petroleum-based grease - it will attack and destroy the rubber seals within weeks.
- Use only DOT 4 or DOT 4 LV brake fluid (whichever the vehicle manufacturer specifies). Do NOT mix DOT 3, DOT 4, DOT 5, and DOT 5.1 fluids - some combinations attack rubber seals and some have different boiling points.
- Bleed the brake system thoroughly after installation. Any air in the caliper prevents firm pedal feel and reduces braking performance.
- After fitting, road-test the vehicle at low speed in a safe area to verify brake operation before driving on public roads. Perform several controlled stops from 40-60 km/h to confirm firm, straight-line braking before highway use.
- Inspect brake pads, brake discs/rotors, and flexible brake lines at the same time - these often need service alongside caliper work, and the labour to replace them is minimal while the caliper is already apart.
- Torque caliper mounting bolts to BMW / Mercedes-Benz / Volvo workshop specification. Using wrong torque values can warp the caliper or cause bolt failure under brake load.
Installation / Use / Maintenance Tips
- Work on one caliper at a time to avoid mixing up left and right hardware. If doing both sides, complete one fully before starting the other.
- Clamp off or cap the brake hose when the caliper is disconnected - prevents excessive brake fluid loss and air ingress into the rest of the system.
- Use compressed air CAREFULLY to push the piston out of the caliper. Place a block of wood between the piston and caliper body to catch the piston as it extends - a piston popping out under full air pressure can cause injury.
- Examine the piston and bore carefully after cleaning. Any scoring, pitting, or corrosion means the caliper cannot be reliably rebuilt with a seal kit - replace the complete caliper.
- Fit the new piston seal (square-section) into its groove in the caliper bore. Fit the new dust boot to the caliper body first, then feed the piston through the boot before inserting into the bore.
- Reconnect the brake hose and caliper to the mounting bracket. Torque mounting bolts to manufacturer specification.
- Bleed the rebuilt caliper using the bleeder screw. Use a two-person or one-person bleeding technique appropriate for your brake system (BMW and Mercedes often require sequence-specific bleeding - consult the workshop manual).
- Check brake fluid level in the reservoir and top up with the correct DOT fluid. Do not over-fill.
- Apply the parking brake, start the engine, and pump the brake pedal several times to seat the new seals and verify firm pedal feel before moving the vehicle.
- Perform a low-speed test drive (under 40 km/h) in a safe area to verify brakes operate correctly and the vehicle tracks straight under braking. Only proceed to normal driving once the brakes are confirmed to work properly.
Common Questions
Will this kit fit my BMW/Mercedes/Volvo?
The kit fits provided (1) your rear caliper is an ATE-branded unit, (2) the piston diameter measures 42 mm, and (3) your vehicle platform appears in the fitment table. All three conditions must be met. If any is uncertain, contact us for verification before ordering.
How do I know if I have ATE calipers?
Inspect your rear caliper (typically visible between the wheel spokes). ATE calipers are marked "ATE" in the casting, often on the outboard or top face of the caliper body. Other common brands on these vehicles include TRW (or Lucas-TRW) and Brembo, which are marked with their own logos. If you can't tell, send us a photograph of your caliper.
Can I rebuild my caliper if it's rusty inside?
A mild surface haze on the piston or bore can be cleaned and rebuilt with a new seal kit. But if there is deep pitting, scoring, or significant corrosion on the piston or in the caliper bore, a repair kit will not seal reliably - replace the complete caliper instead. The cost difference is worth it for brake system reliability.
What's included in the kit?
Piston seal (the square-section hydraulic seal that sits in the caliper bore), dust boot (the flexible outer boot between the piston and caliper), bleeder screw dust cap, and supporting small-parts seals as per kit specification. The caliper piston, caliper body, pads, and discs are NOT included.
Do I need one kit or two?
One kit per caliper. Order 2 kits to rebuild both rear calipers - best practice when one side is showing seal failure, as the other side is likely at a similar wear stage.
Is it worth rebuilding or should I just replace the whole caliper?
Rebuilding with a seal kit is significantly cheaper than caliper replacement, and is the right choice when the caliper body and piston are in good condition. Replace the complete caliper if: the piston is seized, the caliper bore is corroded or pitted, the caliper mounting bracket is damaged, or the caliper has been leaking brake fluid for an extended period (which often indicates bore corrosion).
What brake fluid should I use?
BMW and Mercedes-Benz typically specify DOT 4 LV (low-viscosity) for modern applications. Volvo specifies DOT 4. Check your vehicle owner's manual or service guide for the exact specification. Do not mix DOT fluid types - flush the system and refill with the correct specification if you are unsure what's currently fitted.
How difficult is this to do?
Caliper rebuilding is a moderate-to-advanced DIY job requiring brake bleeding experience, appropriate tools (including a way to push the piston out cleanly), and an understanding of brake safety. If you have not worked on hydraulic brakes before, have a qualified workshop do this job - brake failure from incorrect installation can cause serious injury or death.
Why is "rear" specified - is there a front kit too?
Yes. Front and rear calipers on these vehicles typically have different piston sizes and use different repair kits. This SKU is for the REAR caliper only. Contact us for the matching front caliper repair kit if you need one.
Important: Product information, kit contents and compatibility are provided as a guide and may contain errors or omissions. Please verify that this part and any included components are correct for your vehicle before installation. For full details see our Website Disclaimer (Errors & Omissions).