1991 MAZDA MIATA sensor

1990-91 TORQUE SPECIFICATIONS (929)
Bearing Cap Bolts (1) 54-79 (73-107)
Differential Carrier Bearing Cap Bolts (2) 50-66 (73-107)
Differential Carrier Bearing Lock Tab13-19 (18-26)
Differential Case Front Hanger Nut65-77 (88-104)
Differential Case Rear Mounts54-69 (73-94)
Differential Ring Gear Bolts51-61 (69-83)
Drive Axle Inner CV Joint Nut40-47 (54-64)
Drive Pinion Lock Nut94-210 (127-285)
Drive Shaft Companion Flange36-43 (49-58)
Filler Plug29-40 (39-54)
Ring Gear Retaining Bolts51-61 (69-83)
Support Strut Mounting Bolt54-69 (73-94)
Wheel Lug Nuts65-87 (88-118)
(1)1990 Model.
(2)1991 Model.
ApplicationFt. Lbs. (N.m)
ABS Sensor-to-Hub Support Bolt12-17 (16-23)
Differential Carrier Bearing
Cap Bolts50-66 (68-90)
Lock Tabs13-18 (18-24)
Differential Carrier-to-Housing17-20 (23-27)
Differential Case
Front Hanger Nut69-86 (94-117)
Rear Mounts69-86 (94-117)
Drive Axle Inner CV Joint Nut40-47 (54-64)
Drive Pinion Lock Nut94-130 (127-176)
Drive Shaft Companion Flange Bolts36-43 (49-58)
Filler Plug29-40 (39-54)
Ring Gear Retaining Bolts51-61 (69-83)
Wheel Lug Nuts65-87 (88-118)

1991 Mazda MX-5 Miata
1990-91 DRIVE AXLES Differentials & Drive Axles - 929, B2200, B2600i, MX-5 Miata, MPV, Protege & RX-7
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CONTROL UNITS LOCATION
SENDING UNITS & SENSORS
SENDING UNITS & SENSORS LOCATION
MOTORS
MOTORS LOCATION
SOLENOIDS & SOLENOID VALVES
SOLENOIDS & SOLENOID VALVES LOCATION
ComponentLocation
ABS Control UnitBehind center of dash, near ECU.
Cruise Control UnitBehind left side of dash, above fuse block.
Engine Control Unit (ECU)Behind center of dash. See Fig. 2 .
Supplemental Safety Restraint (SRS)
ModuleBehind left side of dash. See Fig. 3 .
ComponentLocation
ABS Wheel SensorsOn each front & rear wheel hub
assembly.
Airflow MeterConnected to air filter housing. See Fig.
2 .
Atmospheric Pressure SensorBuilt-in ECU.
Brake Fluid Level SensorInside brake master cylinder.
Coolant Temperature SensorOn water outlet, at left rear of engine. See
Fig. 2
.
Cooling Fan ThermoswitchOn thermostat housing.
Crank Angle SensorOn right rear side of cylinder head. See
Fig. 2
.
Intake Air ThermosensorIn airflow sensor unit.
Oil Pressure SensorOn left side of engine near oil filter.
SRS Crash/Impact Sensors
FrontOn center, left and right front of
vehicle. See Fig. 3
.
CenterBehind center of dash. See Fig. 3 .
Throttle Position Sensor (TPS)Mounted on side of throttle body. See
Fig. 2
.
ComponentLocation
A/C-Heater Blower MotorBehind left side of dash.
Wiper MotorOn right side of firewall.

1991 Mazda MX-5 Miata
ELECTRICAL COMPONENT LOCATOR 1991 MAZDA ELECTRICAL COMPONENTS
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1. Raise and support vehicle. Remove wheel assembly. Remove axle lock nut. Remove cotter pin, and
disconnect tie rod from steering knuckle. Remove and wire aside brake caliper.
2. Separate lower control arm from ball joint. Remove bolt attaching ball joint to steering knuckle. Remove
bolts retaining steering knuckle to strut assembly. Separate hub and knuckle from drive shaft. Remove
wheel hub and rotor from knuckle. Remove bearings and oil seals.
Removal (MX-6 & 626)
1. Raise and support vehicle. Remove wheel assembly. Disconnect tie rod end from steering knuckle.
Disconnect stabilizer bar from lower control arm. Remove axle lock nut.
2. Disconnect brake line from strut assembly. Remove and wire aside brake caliper. Remove wheel speed
sensor. Remove bolt attaching ball joint to steering knuckle. Remove bolts attaching steering knuckle to
strut assembly. Remove steering knuckle.
3. Remove wheel hub from knuckle using Puller Set (49-G033-1A1). Remove snap ring. Remove wheel
bearing from steering knuckle using Remover (49-G033-106).
Removal (Protege, 323 & 929)
1. Raise and support vehicle. Remove wheel assembly. Remove axle lock nut. Remove cotter pin, and
disconnect tie rod from steering knuckle. Remove and wire aside brake caliper. Separate lower control
arm from ball joint. Remove bolts retaining steering knuckle to strut assembly.
2. On Protege and 323, separate hub and knuckle from drive shaft. Remove wheel hub and rotor from
knuckle. Place alignment marks on rotor and wheel hub. Separate and remove dust cover. Remove
bearings, oil seals, bearing outer races and spacer.
3. On 929, remove hub and rotor. Remove grease seal, sensor ring and circlip. Press bearing from hub
assembly. DO NOT reuse old bearing once pressed from hub.
Removal (RX7)
Raise and support vehicle. Remove wheel assembly. Remove and wire aside brake caliper. Remove grease cap,
cotter pin, nut lock and spindle nut. Remove washer and outer wheel bearing. Remove hub and rotor assembly.
Remove wheel speed sensor ring. Remove inner oil seal and wheel bearing.
Inspection (All Models)
Wash all disassembled parts before inspection. Check for damage, excessive wear and signs of bearing seizure.
Inspect steering knuckle and hub for cracks, scoring and rust. Check for damaged dust cover and poor fit with
steering knuckle.
Installation (All Models)
To install, reverse removal procedure. Adjust wheel bearing preload. See WHEEL BEARING under
ADJUSTMENTS & INSPECTION
. NOTE: If bearings need to be replaced on RX7, also replace hub.

1991 Mazda MX-5 Miata
SUSPENSION - FRONT 1990-91 SUSPENSION Front
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Lower Control Arm-To-Frame54-69 (73-93)
Lug Nuts65-87 (88-118)
Stabilizer Bar Bolts (Frame)13-19 (18-26)
Stabilizer Bar Link Bolts27-40 (36-54)
Shock Absorber Assembly-To-Body Nuts21-27 (29-36)
Shock Absorber Lower Bolt54-69 (73-93)
Shock Absorber Lock Nut23-34 (31-46)
Tie Rod-To-Knuckle Nut21-32 (29-44)
Upper Ball Joint-To-Knuckle Nut30-46 (41-62)
Upper Control Arm-To-Frame87-102 (118-138)
MPV
Ball Joint-To-Lower Control Arm Bolt (4WD)75-101 (102-137)
Ball Joint-To-Lower Control Arm Nut (4WD)94-127 (128-172)
Brake Caliper Bracket Bolts65-80 (88-108)
Drive Axle Lock Nut131-173 (177-235)
Lower Control Arm-To-Frame (2WD)94-108 (127-146)
Lower Control Arm-To-Frame (4WD)101-127 (137-172)
Lug Nuts65-87 (88-118)
Stabilizer Bar Bolts (Frame) (2WD)37-45 (50-61)
Stabilizer Bar Bolts (Frame) (4WD)14-19 (19-26)
Strut Assembly Lock Nut47-59 (64-80)
Strut Assembly-To-Body Nuts21-27 (29-36)
Strut Assembly-To-Knuckle Bolt69-86 (93-117)
Strut Rod Body Bushing Bolt61-76 (83-103)
Strut Rod-To-Body Nut108-127 (146-172)
Strut Rod-To-Lower Control Arm76-92 (103-125)
Tie Rod-To-Knuckle Nut44-58 (59-78)
MX-6 & 626
Ball Joint-To-Steering Knuckle Nut27-40 (36-54)
Brake Caliper Bracket Bolts58-72 (78-98)
Drive Axle Lock Nut173-235 (235-319)
Lower Control Arm-To-Frame58-78 (78-106)
Lug Nuts65-87 (88-118)
Stabilizer Bar Bolts (Frame)27-40 (36-54)
Strut Assembly Lock Nut47-59 (64-80)
Strut Assembly-To-Body Nuts34-46 (46-63)
Strut Assembly-To-Knuckle Bolt69-86 (93-117)
Tie Rod-To-Knuckle Nut31-42 (42-57)
Wheel Speed Sensor Bolt12-17 (16-23)
Protege & 323
Ball Joint-To-Lower Control Arm Nut69-86 (93-117)

1991 Mazda MX-5 Miata
SUSPENSION - FRONT 1990-91 SUSPENSION Front
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SUSPENSION - REAR
1991 SUSPENSION Rear
DESCRIPTION
Rear suspension consists of MacPherson-type struts, crossmember, upper and lower arms and stabilizer bar with
control link. Upper and lower arms attach to crossmember and knuckle. A stabilizer bar with control link is
mounted to lower arm and crossmember. Rear wheel alignment is adjusted by turning adjusting cams on lower
arm.
ADJUSTMENTS & INSPECTION
WHEEL ALIGNMENT SPECIFICATIONS & PROCEDURES
See WHEEL ALIGNMENT SPECIFICATIONS AND PROCEDURES article in the WHEEL ALIGNMENT
section.
WHEEL BEARING
Raise vehicle and support. Remove wheel assembly. Remove caliper assembly and wire aside. Remove brake
rotor. Attach dial indicator to axle hub and measure bearing play. Maximum bearing play is .002" (.05 mm). If
play exceeds specification, check rear axle lock nut torque or replace wheel bearing.
REMOVAL & INSTALLATION
WHEEL BEARING
Removal
1. Raise and support vehicle. Remove wheel assembly. Remove drive axle lock nut. Remove brake caliper
assembly, and wire aside. Remove screws and rotor. Disconnect ABS speed sensor. Remove knuckle
assembly from upper and lower arms.
2. Using a press, Installer (49-G030-727) and Puller (49-F026-103), remove hub from knuckle. Remove
snap ring from knuckle. Using a press, installer and Puller (49-0636-145), remove wheel bearing inner
race from hub. Remove wheel bearing outer race from knuckle using a press and Adapter (49-F027-005).
Inspection
Check wheel hub and knuckle for cracks and damage. Check dust cover for deformation. Check bearing for
excessive wear or seizure.
Installation
Press new wheel bearing into knuckle using Installer (49-F027-007) and Adapter (49-F027-009). Press hub into
knuckle using installer. To install, reverse removal procedure. Tighten drive axle lock nut to specification. Stake

1991 Mazda MX-5 Miata
SUSPENSION - REAR 1991 SUSPENSION Rear

1991 Mazda MX-5 Miata
SUSPENSION - REAR 1991 SUSPENSION Rear
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Sunday, July 05, 2009 2:09:35 PMPage 1 © 2005 Mitchell Repair Information Company, LLC.
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Installation
Inspect stabilizer bar and components for damage, cracks and deterioration. To install, reverse removal
procedure. Ensure bushing is aligned with White line on stabilizer. Ensure seam faces front of vehicle. Tighten
nuts and bolts to specification with vehicle resting on ground and suspension unloaded.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
ApplicationFt. Lbs. (N.m)
ABS Speed Sensor Harness Bracket Bolts12-17 (16-23)
Caliper Assembly-To-Knuckle Bolt36-51 (49-69)
Control Link-To-Lower Arm Nut27-40 (36-54)
Lower Arm-To-Crossmember Nuts54-70 (73-95)
Lower Arm-To-Knuckle Nut46-55 (63-75)
Rear Axle Nut159-217 (216-294)
Stabilizer Bar Brackets Bolts15-21 (20-28)
Stabilizer Bar-To-Control Link Bolt27-40 (36-54)
Strut Piston Rod Lock Nut23-34 (31-46)
Strut-To-Body Nuts22-27 (29-36)
Strut-To-Lower Arm Bolt54-69 (73-93)
Upper Arm-To-Crossmember Nuts34-49 (46-67)
Upper Arm-To-Knuckle Bolt34-49 (46-67)
Wheel Lug Nuts65-87 (88-118)

1991 Mazda MX-5 Miata
SUSPENSION - REAR 1991 SUSPENSION Rear
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Sunday, July 05, 2009 2:09:35 PMPage 5 © 2005 Mitchell Repair Information Company, LLC.